Questions Asked on
October 6, 2010

  1. 8th grade

    what do you call someone who cant turn pancakes?

    asked by ben
  2. Math

    Betsy, a recent retiree, requires $6,000 per year in extra income. She has $60,000 to invest and can invest in B-rated bonds paying 13% per year or in a certificate of deposit (CD) paying 3% per year. How much money should be invested in each to realize

    asked by Lisa
  3. science physics

    Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. If they are initially d = 7.5 km apart, how long will it be before they reach each other?

    asked by julie
  4. Gen Chem 1

    A tanker truck carrying 2.01×10^3kg of concentrated sulfuric acid solution tips over and spills its load. The sulfuic acid is 95.0% H2SO4 by mass and has a density of 1.84g/L. Sodium Carbonate (Na2CO3)is used to neutralize the the sulfuric acid spill. How

    asked by Rachel
  5. Chemistry

    CO+H2O CO2+H2 kp=0.0611 atm @2000K A reaction mixture initially contains a CO partial pressure of 1334 torr and H2O partial pressure of 1778 torr at 2000K. Whats the partial pressure of CO2 and H2? I got 381 torr for both, but its not correct.

    asked by Anonymous
  6. Physics

    An object is being acted upon by three forces and moves with a constant velocity. One force is 60N along the x-axis, the second force is 75N along a direction making a counterclockwise angle of 150 degrees with the x-axis. What is the direction of the

    asked by Amanda
  7. Chemistry

    I found the following procedure to prepare starch indicator solution on a website:- To prepare starch indicator solution, add 1 gram of starch (either corn or potato) into 10 mL of distilled water, shake well, and pour into 100 mL of boiling, distilled

    asked by annie
  8. chemistry

    part B. would you expect the emissions to vary if metal flourides were used rather than metal chlorides?

    asked by JC
  9. math

    points a,b,c,and d lie on a straight line in the given order. AC = 25 cm and BD = 46 cm. The ratio of length CD to AB is 5/2. Find the length of line segment BC in cm. sorry miss the CD part

    asked by jani
  10. Physics

    For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target

    asked by Steven
  11. Science

    A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of this gas?

    asked by Wyeth
  12. Physics

    A 20 g mass is attached to a 120 cm long string. The tension in the string is measured to be .200N. What is the angle. l\ l \ l \ l \ l o l Sorry crappy picture, but the circle is the mass and the diagonal lines represent the string the mass is attached

    asked by Amanda
  13. math

    my number is a multiple of 5, but doesnt end in 5, the prime factorization of my number is a string three numbers, two of the numbers in the prime factorization are the same, my number is bigger than the seventh square number

    asked by Anonymous
  14. US History

    The question is "How might Juan Cabrillo's explorations affect later settlements in CA?" In the book there's only a little sentence talking about him.. "Cabrillo sailed 1,200 miles along the coast of what is now California. Cabrillo failed to find wealth,

    asked by katherine
  15. ap chemistry

    A mixture contains only NaCl and Fe(NO3)3. A .456 gram sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is dried and filtered, and its mass is determined to be .107 g. The mass

    asked by kelly
  16. Chemistry

    Solutions of silver nitrate and sodium chromate are mixed. What is the net ionic equation? I got: 2Ag(aq) + CrO4-2(aq) -> Ag2CrO4(s) is that right?

    asked by Sara
  17. chemistry/thermochem

    The bond enthalpy of F2(g) is 156.9 kJ/mol. Calculate ÄH°f for F(g). 1 kJ/mol

    asked by myles
  18. Physics

    An airplane flies due north at 250 km/h relative to the air. There is a wind blowing at 60 km/h to the northeast relative to the ground. What are the plane's speed and direction relative to the ground?

    asked by Preston
  19. Physics

    A merry-go-round is at rest before a child pushes it so that it rotates with a constant angular acceleration for 38.0 s. When the child stops pushing, the merry-go-round is rotating at 1.20 rad/s. How many revolutions did the child make around the

    asked by Gracie
  20. chem

    Po-218 is an alpha emitter with a half-life of 3.0 minutes. If a sample contains 56 mg of Po-218, how many alpha emissions would occur in 6.0 minutes? I got 2.4e20 but it said it was wrong. I did what my teacher showed us to do. My work: 86(i got this by

    asked by sara
  21. physics

    An airplane has a velocity of 400 km/h relative to the wind. At the same time, a wind blows northward with a speed of 75 km/h relative to earth. Find the direction that the airplane must head in order to move in an easterly direction relative to earth.

    asked by adz
  22. 3rd grade

    sketch and label all possible rectangles with a perimeter of 30cm and sides whose lengths are whole numbers

    asked by Bruna
  23. math

    could you use only the millions period to order 462,409,524, 463,409,524 and 463,562,391

    asked by Amari
  24. physics

    A particle that hangs from a spring oscillates with an angular frequency ω. The spring-particle system is suspended from the ceiling of an elevator car and hangs motionless (relative to the elevator car) as the car descends at a constant speed v. The car

    asked by flame
  25. Physics

    A circus performer juggling while standing on a platform 15.0-m high tosses a ball directly upward into the air at a speed of 2.0 m/s. If it leaves his hand 0.5 m above the platform, what is the ball's maximum altitude? If the juggler misses the ball, at

    asked by Sammie
  26. chemistry

    the molar mass of a newly synthesized jluorocarbon was measured in a gas microbalance, This device consists of a gkass bulb forming one end of a beam, the whole surrouned by a closed container. The beam is pivoted and the balance point is attained by

    asked by jack
  27. chemistry

    Calculate the heat released when 3.10 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride

    asked by Tits magee
  28. physics

    Romeo is tossing pebbles at Juliet's window and wants the pebbles to hit the window gently, with only a horizontal component to their velocity, as they hit the window. He is standing at the edge of a rose garden 4.5m below her window and 5.0m from the base

    asked by Cristina
  29. Chemistry

    I did a lab for Organic Chemistry I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol. I also did a

    asked by Omar
  30. Writeacher, Please Help

    The teacher said we had to include quotes from the story, so I included them and describes Katherine in every way I could. I describes her being ambarrased, selfish, etc. I don't know what else to add, could you please offer some help, thanks. In the

    asked by Sara
  31. Biochemistry

    Calculate the free energy of hydrolysis of ATP, ADP, Pi concentrations are 3.4, 1.3, and 4.8 mM respectively. (ATP hydrolysis has delta G= - kJ/mol)

    asked by Help Pleasssssssse!!!
  32. chemistry

    calculate the amount of solid NH4Cl to add to 50 mL of 1 M ammonia to form a mixture that has a pH of 9 assume no volume change in the solution

    asked by maycee
  33. chemistry

    Calculate the heat released when 3.10 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride. 1 kJ

    asked by mylles
  34. science

    how do you find the electronegativity of Ethanol (C2H5OH)?

    asked by gabrielle
  35. Science

    A horse with a force of 50 N pulls a cart of wood a distance of 10 m. Calculate the amount of work done.

    asked by George perez
  36. Physics

    The 3.42 kg physics book shown is connected by a string to a 518.0 g coffee cup. The book is given a push up the slope and released with a speed of 2.73 m/s. The coefficients of friction are μs = 0.490 and μk = 0.185. What is the acceleration of the book

    asked by Rishi
  37. Calculus

    A kicker is setting up for a field goal. The goal is 120 feet away and 10 feet high. The kicker can give an initial speed of 75 ft/s to the ball. What range of angles of elevation are possible to kick the ball so it passes over the goal?

    asked by Dean
  38. math

    A firefighter stood on the middle rungs of a ladder ,spraying water on a burning house. He then climbed up 6 rungs before the heat of the flames caused him to come down 10 rungs.After some minutes he was able to climb 18 rungs to the very top of ladder

    asked by Thanh
  39. AP Chemistry

    how do you balance a redox equation like: Bi(NO3)3 + Al + NaOH = Bi + NH3 + NaAlO2 ??

    asked by Nicole
  40. Physics

    The 3.42 kg physics book shown is connected by a string to a 518.0 g coffee cup. The book is given a push up the slope and released with a speed of 2.73 m/s. The coefficients of friction are μs = 0.490 and μk = 0.185. What is the acceleration of the book

    asked by Rishi
  41. physics

    a train moving at a constant speed of 100km/h travels east for 40 minutes..then 30 degree east of north for 20 minutes...and finally west for 30 minutes..what's the trains average velocity for the trip at which direction?

    asked by Anonymous
  42. Physics

    The 3.42 kg physics book shown is connected by a string to a 518.0 g coffee cup. The book is given a push up the slope and released with a speed of 2.73 m/s. The coefficients of friction are μs = 0.490 and μk = 0.185. What is the acceleration of the book

    asked by Rishi
  43. Chem

    What is the correct net ionic equation for the following set of reactants? Ba(OH)2(aq)+H2SO4(aq)---->2H2O(l)+BaSO4 I keep getting the answer as 2OH^- + 2H^+ ----> 2H2O(l) but it counts it wrong.

    asked by Kaylee
  44. chemistry

    Determine the mass in grams of 2.56*10^24 atoms in Li

    asked by Aundrea
  45. Chemistry

    An enzymatic hydrolysis of fructose was allowed to proceed to equilibrium at 25 degrees C. The original concentration of fructose-1-p was .2 M, but when the system had reached equlibrium the concentration of fructose 1-p was only 6.52 * 10 -5 M. Calculate

    asked by Confused
  46. Chem

    Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate. I know the equation is AgNO3(aq)+NaCl(aq)---->NaNO3(aq)+AgCl(s) Is Ag^+(aq)+ Cl^-(aq)--->AgCl(s) right?

    asked by Kaylee
  47. math

    The population of bacteria in one cubic centimeter of the blood of a sick person has been modeled by the function P(t) = 115 t(0.88^t) where t is the time, in days, since the person became ill. Estimate how fast the population is changing 14 days after the

    asked by lin
  48. physics

    A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 26 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward

    asked by ZAC
  49. Math 2nd grade

    It is greater than 7 tens and less than 8 tens. the number has 4 ones. write the number word

    asked by Rita
  50. Chemistry

    How would I determine the electronegativity of Ethanol?

    asked by Jennifer
  51. Physics

    A boat is rowed directly upriver at a speed of 2.4 m/s relative to the water. Viewers on the shore see that the boat is moving at only 0.6 m/s relative to the shore (heading upriver). What is the speed of the river?

    asked by Preston
  52. 2nd grade

    question: I have fewer ones than tens. The value of my tens is 30. What two numbers can I be?

    asked by tammy
  53. chemistry

    calculate the volume of .1M HCl that is required to react with 50 mL of .1M ammonia to form a mixture that has pH 9

    asked by maycee
  54. chem

    How many grams of CH3COOH are needed to make 4.2 liters of aqueous solution of pH=3.4?Be sure to back correct from equilibrium molecular acid molarity to starting molecular acid molarity.

    asked by meg
  55. Math

    Mrs. Jones had some white paint and some green paint, and a bunch of wooden cubes. Her class decided to paint the cubes by making each face either solid white or green. Juan painted his cube with all 6 faces white - Julie painted her cube solid green.

    asked by Mia
  56. STUDY UNIT: INTERPRETING WHAT YOU READ

    Except for a few pigeons, Central Park was deserted. Mist hung above the chilled grass. Patches of old snow, scattered here and there, looked like white puddles. The sun hung just above the horizon, casting red and orange streaks across low-hanging clouds.

    asked by leyla
  57. Physics

    An airplane flies due north at 145 km/h with respect to the air. There is a wind blowing at 65 km/h to the east relative to the ground. What is the plane's speed relative to the ground?

    asked by Preston
  58. Statistics

    The weight of a product is normally distributed with a standard deviation of .8 ounces. What should the average weight be if the production manager wants no more than 5% of the products to weigh more than 5.3 ounces?

    asked by Beverley
  59. chemistry

    calculate the amount of solid NH4Cl to add to 50 mL of 1 M to form a mixture that has a pH of 9 assume no volume change in the solution

    asked by maycee
  60. Physics

    A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the

    asked by Emily
  61. algebra

    If the area of a square is 9x2-12xy+4y2, what is the perimeter of the square in terms of x and y. *its 9x squared and 4y squared i have several problems like this on my homework if you show me how to do this one im sure i could figure out the rest

    asked by Emily
  62. Physics

    A speedboat starts from rest and accelerates at +1.94 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.515 m/s2. Following this, the boat accelerates at -1.58 m/s2 for 8.00 s. What is the

    asked by Bala
  63. history

    Where were the Jews of the Diaspora living? The Jews were living in Egypt, and other lans bordering the Mediterranean Sea. Do you think this ansewr is what my teacher is looking for? I read the chapter!

    asked by Reed
  64. Physics..help please

    A 715 N man stands in the middle of a frozen pond of radius 10.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward

    asked by jake
  65. chemistry

    Suppose you put 50mL of water in the can instead of 100mL and heated it to 40 degrees instead of 20 degrees. In what ways, if any, would this afect the results of the experiment? What would happen if you used 200mL of water and heated it only 10 degrees?

    asked by Dan
  66. Statics for Engineers

    Knowing that the coefficient of static friction between the collar and the rod is 0.35, determine the range of values of P for which equilibrium is maintained when theta = 50 degrees and M = 20 Nm. From 9th edition Beer, Johnston Vector Mechanics for

    asked by Laine
  67. chemistry

    the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.

    asked by Confused
  68. Social Studies

    Please check my answers!!! 1. According to the Anti-Federalists, too strong of a national government meant a. eventual encroachment upon the sovereignty of the states. b. that a new Constitutional convention would have to convene every few years. c. that a

    asked by kenji
  69. Chemistry

    Solutions of silver nitrate and sodium chromate are mixed. What is the net ionic equation? I got: 2Ag(aq) + CrO4-2(aq) -> Ag2CrO4(s) is that right?

    asked by Sara
  70. math

    a model of a bridge is 1 meter long and is 2.5% of the actual size of the bridge. How long is the actual bridge? i tired to do 1 x 2.5% but its 2.5 so i don't think that is correct. help please?

    asked by courtney
  71. Physics

    One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

    asked by Andrea
  72. physics

    how much heat is required to change 400g of ice at -20c into steam at 120c

    asked by steve
  73. Physics - work done

    A variable force F acts through a displacement d. The magnitude of the force is proportional to the displacement, so F=kd, where k is constant. a) Sketch a graph of this force against position up to position x. b) According to the equation, what is the

    asked by Shaila
  74. bus stats

    60% of households have internet, what is the probability that 3 randomly selected households will have internet?

    asked by Michelle
  75. geography

    Heyyyyy, Where was the eroded material from the Canadian shield deposited and what did this material become? THANKS SO MUCH TO ALL!! :)

    asked by I NEED HELP NOW!!:)
  76. chemistry

    A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate)

    asked by Anonymous
  77. chemistry

    How many grams of HCOOH are needed to make 3.7 liters of aqueous solution of pH=3.5?

    asked by nick
  78. Physics..help please

    A rifle with a weight of 35 N fires a 4.0 g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. ___m/s (b) If a 700 N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle. ___m/s

    asked by jake
  79. Intermediate Algebra(Math)

    Mixed nuts. Oh Nuts! sells pistachio kernels for $6.50 per pound and almonds for $8.00 per pound. How much of each type should be used to make a 50-lb mixture that sells for $7.40 per pound? So far I have, this: 6.50x + 8 (50 - x) = 7.50 (50) 6.50x + 400 -

    asked by Lyri
  80. Chemistry 12

    Hello fellow comrades, I was assigned the sulphur clock reaction lab and I'm a tad bit confused by it. Anyway, here's the lab procedure: 1. take 5 test tubes, labeled a,b,c,d and e. accurately measure out 10.0 ml of .20M sodium thiosulphate in test tube A

    asked by TaeYeon
  81. Science

    How sediments,fossil, and ice core record Earth's geologic history? It record Earth's geologic history by giving scientist an idea of when certain climates or events happen.(Is this a good answer?) Thanks

    asked by Shadow
  82. chemistry

    Calculate the mass percent composition of iron for the second one of these iron ores. fe2o3 fe3o4

    asked by royalty
  83. Intermediate Algebra (Math)

    Mixed nuts. Oh Nuts! sells pistachio kernels for $6.50 per pound and almonds for $8.00 per pound. How much of each type should be used to make a 50-lb mixture that sells for $7.40 per pound? So far I have, this: 6.50x + 8 (50 - x) = 7.40 (50) 6.50x + 400 -

    asked by Lyri
  84. Math

    Sheila's age is two years more than twice Nicole's age. The sum of their ages is the same as Steven's age. If Steven's age is ten years less than five times Nicole's age, ,find the age of each. Write a verbal model!

    asked by jj
  85. math

    Place six coins on the table in the arrangement shown in the first row below... Start like this...head tales head tales head tales Your task is to produce the second arrangement shown by flipping coins according to thsi rule: you must flip two adjacent

    asked by Katherine
  86. calculus

    a woman on a dock is using a rope to pull in a canoe. the rope is pulled at the rate of 2 ft/sec, 3ft above the point level with the connection of the rope to the canoe. How fast is the canoe approaching the dock when the length of the rope from her hands

    asked by Joshie
  87. chemistry

    Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all

    asked by Missy
  88. CHEM 111-O2

    C57H104O6(l)+O2(g) CO2(g)+H20(g) THE COEFFICIENTS OF PEANUT COMBUSTION

    asked by KILO
  89. calculus

    Try to find the value of a such that the function f(x)=asinx+ (1/3) sin3x gets its extremum points at the point x= (π / 3). Decide if it is maximum or minimum, and find it.

    asked by baby
  90. APC Chemistry

    Please correct me if any wrong info is given Volume(cm3)Area (cm2)Thickness (cm) .20 cm3 100 cm2 0.02 cm .28 cm3 122 cm2 0.002 cm .24 cm3 144 cm2 0.016 cm .41 cm3 225 cm2 0.0182 cm If you had used a very crude balance that allowed only one significant

    asked by Anonymous
  91. physics

    At a construction site a pipe wrench struck the ground with a speed of 45 m/s. (a) From what height was it inadvertently dropped? (b) How long was it falling?

    asked by monnie
  92. physics

    an electric sign weighing 200 newtons is supported by two slanting cables. each cable is attached to the same point of the sign and makes a 45 degree angle with the horizontal. what is the component of the force exerted by the sign along each of its

    asked by Christina
  93. physics

    A skier is gliding along at on horizontal, frictionless snow. He suddenly starts down a incline. His speed at the bottom is . What is the length of the incline? How long does it take him to reach the bottom?

    asked by Alex
  94. algebra

    A triangle has side lengths of 5 inches, 12 inches, and 15 inches. Every dimension is multiplied by 1/5 to form a new triangle. How is the ratio of the perimeters related to the ratio of corresponding sides?

    asked by Anonymous
  95. calculus

    gas is pumped into a spherical balloon at the rate of 1 cubic feet per minute. How fast is the diameter of the balloon increasing when the balloo0n contains 36 cubic feet of gas?

    asked by Joshie
  96. Physics

    An arrow is launched vertically upward from a crossbow at 98.2 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneous

    asked by jake
  97. analogies

    dollar:cent;meter:_________

    asked by jaylen
  98. chemistry

    If the initial pressure of H2S(g) is 7.404 atm, calculate the % decomposition of H2S(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1132 °C is 0.0265. The initial pressure of the reaction products is 0

    asked by Anonymous
  99. Physics - gravitational potential energy

    When developing the equation for gravitational potential energy, why is it necessary to assume that the mass is rising at a constant speed?

    asked by Shaila
  100. Physics

    You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when

    asked by Emily
  101. Physics

    A golf club contacts a ball for 0.15 s at angle to horizontal and the ball strikes ground distance from fairway. Initial speed 25 m/s and angle of projection is 15 degrees Calculate time between 1.ball leaving club and when it first touches ground 2.range

    asked by LynAnne
  102. physics

    A block of mass 39 kg lies on an inclined plane, as shown. The horizontal and vertical supports for the plane have lengths of 36 m and 15 m, respectively, and the coefficient of kinetic friction between the plane and the block is 0.3. The magnitude of the

    asked by christine
  103. Chemistry

    Phenylcarbinol is used in nasal sprays as a preseriative. A solution of 0.52g of the compound in 25.0g of water has a melting point of -0.36C. What is the molar mass of phenylcarbinol?

    asked by Tara
  104. Math

    Determine whether the following statements are always,sometime, or never true.Explain 1.Three points determine a plane. 2.The intersection of two planes can be a point. 1.Never true, the three points must be noncollinear. 2.Never true, the intersection of

    asked by Shadow
  105. Physics

    A bag of sand dropped by a would-be assassin from the roof of a building just misses Tough Tony, a gangster 2-m tall. The missile traverses the height of Tough Tony in 0.22 s, landing with a thud at his feet. How high was the building? Ignore friction.

    asked by Connie
  106. I NEED HELP REALLY BAD!

    ok so your sister buys a pencil as .39 cents. And a notebook (1) for 1.19$. the total cost was 3.92$. how many pencils did she buy? show work, but i don't know how. our teacher help us with word prblems.

    asked by May
  107. economics

    explain how the wage can adjust to balance the supply and demand for labor while simultaneously equaling the value of the marginal product of labor

    asked by chris
  108. chemistry

    why should you never mix bleach with any cleaner or other household product which may contain acid?

    asked by Anonymous
  109. physics

    A boy walks a total distance of 210 km due North. His starting position is at 20 km and his final position is 34 km. If it takes him 3 hours and 20 minutes to make his trip, what is his velocity? What is his speed?

    asked by Justin
  110. physics

    A descending elevator of mass 670 kg is uniformly decelerated to rest over a distance of6 m by a cable in which the tension is 8683 N.The acceleration due to gravity is 9.8 m/s2.Calculate the speed vi of the elevator at the beginning of the 6 m descent.

    asked by christine
  111. chem

    why do different compound have different colours in their visible emissions?

    asked by JC
  112. college

    A 26 loudspeaker is suspended 3.0 below the ceiling by two cables that are each 40 from vertical. What is the tension in the cables? help please!

    asked by Lance
  113. geometry

    Emma is installing a new tile floor. Each tile measures 12 inches by 12 inches. The room in which she is installing the tiles measures 14 feet by 10 feet. If each tile costs $1.25, how much will it cost Emma to complete her project?

    asked by keisha
  114. Chemistry

    A sample of natural gas at STP is 78% CH4 and 22% C2H6 by volume. How many moles of each gas are present in 1.60L of the mixture? Assume ideal gas behavior

    asked by Missy
  115. health

    Which organization would you call if you were involved in a natural disaster?

    asked by jazz
  116. Physics

    Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 85.0 m and the coefficient of friction is 0.38?

    asked by Preston
  117. Chemistry

    I need help calculating the partial pressure of H2 using the following information 0.028 g Mg with excess HCl which produced 31.0 mL of H2 gas. The gas was collected by water displacement in a 22 degrees Celsius water bath. The pressure was 746 mmHg.

    asked by Amanda
  118. Chemistry

    How many milliliters of 0.230 M Na2S2O3 solution are needed to titrate 2.349 g of I2 according to the equation below? I2(aq)+2S2O3^2-(aq)->S4O6^2-(aq)+2I^1-(aq)

    asked by Drew
  119. chemistry

    the boiling point of water at 735mmHg is 99.073 degrees celcius. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000 degrees celcius? Kb for water = 0.510 K Kg mol-1

    asked by Kell
  120. physics

    A 1.50 multiplied by 103 kg car starts from rest and accelerates uniformly to 19.9 m/s in 11.6 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. 1 W (b) Find the instantaneous

    asked by bk
  121. physics

    If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? answer in m/s.

    asked by confused
  122. Algebra

    Help please-I'm doing something wrong- Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with -0.38 + 0.5 and -0.38 - 0.5 But it's not right when I go to put it back in. Could you please show the

    asked by Sandra
  123. Management (open to everyone)

    My ideas are after the question. Please add to them or comment. Assume that you represent the top administrators of a large university with 15,000 students. Over the past three years there have been an increasing number of applicants to the school.

    asked by Mical
  124. PHYSICS ---HELP!

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by Leila
  125. Physics

    An ideal gas in a rigid container (constant volume) has its pressure cut in half slowly. In the process, 265 kJ of heat left the gas. (a) How much work was done during the process? (b) What was the change in internal energy of the gas during this process?

    asked by Andrea
  126. Physics-Just a clarification

    I have a question? What does hf = hi+Vivertical stand for? I haven't seen hf or hi or Vivertical yet in class-I just started a few weeks ago. Bob Pursley answered a question but I don't know what the abbreviations mean. Thank you for the direction-

    asked by LynAnne
  127. Physics

    A weight of 50.0 N is hung from the center of a stretched horizontal wire 10.0 meters long. It causes the wire to say 1.00m at its center. What is the force exerted by each half of the wire in supporting the weight?

    asked by Christina
  128. chemistry

    From data below, calculate the total heat (J) needed to convert 0.298 mol of gaseous ethanol (C2H6O) at 401°C and 1 atm to liquid ethanol at 25.0°C and 1 atm.

    asked by myles
  129. physics

    One kilogram of water vapor at 200 kPa fills one side of a partitioned chamber. The right side is twice the volume of the left and is initially evacuated. Determine the pressure of the water after the partition has been removed and enough heat has been

    asked by sandhya
  130. Physics

    Water flows approx. 0 over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

    asked by Rick
  131. calculus

    For the function f(x)= (√1−x) / ( √1+x) find: a. the regions of increase and decrease, b. the regions of concave up/down and where f(x)
has an inflection point. c. The "regions" should be open intervals or the empty set ϕ

    asked by baby
  132. Algebra

    Write the polynomial function as a product of linear factors. 6x^4-7x^3-10x^2+17x-6

    asked by Roger
  133. Physics

    I have 3 different questions. 1) Calculate the coefficient of kinetic friction if it takes a force of 64 Newtons to keep a 54 kilogram box of books sliding across any icy surface at a uniform speed. 2) A car weighing 14,000 Newtons rests on a 20.0 degree

    asked by Dorothy
  134. Chemistry

    If you had one gallon of concentrated hydrochloric acid (12 N) and added water to make dilute hydrochloric acid (6 N), how much dilute hydrochloric acid would you have?

    asked by Jeff
  135. calculus

    If f(x) = sec x, find f''(π/4).

    asked by Sasha
  136. Physics

    You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when

    asked by Emily
  137. algebra

    the number of boys is ten less than double the number of girls, if the total number of students is 38 how many boys and girls are in the class

    asked by Anonymous
  138. Projectile Motion Physics

    An Arrow directed at a stationary target is shot at an angle of E25N. The arrow hits the intended target at the same height from which it is launched, 3.0s later. Determine the distance from the archer to the target.

    asked by Jason
  139. eakin elementary

    If the 80o angle is in standard position, find two positive coterminal angles and two negative coterminal angles.

    asked by tj
  140. physics

    A bag of sand dropped by a would-be assassin from the roof of a building just misses Tough Tony, a gangster 2-m tall. The missile traverses the height of Tough Tony in 0.22 s, landing with a thud at his feet. How high was the building? Ignore friction.

    asked by alexa
  141. Geometry

    If the measures of two complementary angles are in the ratio 1:5, the measure of the larger angle is: A)75 B)144 C)150 D)72

    asked by Troy
  142. math

    points a,b,c,and d lie on a straight line in the given order. AC = 25 cm and BD = 46 cm. The ratio of length AB is 5/2. Find the length of line segment BC in cm

    asked by jani
  143. Biochemistry

    ATP hydrolysis at pH 7.0 is accompanied by release of a hydrogen ion to the medium. if delta G note for this reactionis -30.5 kJ/mol, what is the free energy change for the same reaction with all component, including H+ at a standard state

    asked by Help Pleasssssssse!!!
  144. chemistry

    How many grams of HCOOH are needed to make 3.7 liters of aqueous solution of pH=3.5? I have followed the steps for a similar problem posted;I found x to 3.16e-4 mol/L but I'm having trouble converting it to grams.

    asked by nick
  145. phy

    A ball is thrown from the window of a high-rise building with an initial velocity of 6.1 m/s at an angle of 32 deg. below the horizontal. The bill strikes the ground 4.4 seconds after being thrown. Find the height from which the ball was thrown.

    asked by Anonymous
  146. Com/155

    Imagine you are expected to write a three-page paper. Design an organizational and time management plan to complete this paper. Keep in mind the paper requirements are to select a topic, write a thesis, write supporting material, and include a minimum of

    asked by Anonymous
  147. Physics

    A powerboat heads due northwest at 11 m/s relative to the water across a river that flows due north at 5.9 m/s. What is the velocity (both magnitude and direction) of the motorboat relative to the shore?

    asked by Preston
  148. calculus

    an 8ft 2 by 4 is leaning against a 10ft wall. THe lower end of the 2 by 4 is pulled away from the wall at the rate of 1ft/sec. How fast is the top of the 2 by 4 moving toward the ground (a) when it is 5 ft from the ground and (b) when it is 4 ft from the

    asked by Joshie
  149. physics

    One kilogram of water vapor at 200 kPa fills one side of a partitioned chamber. The right side is twice the volume of the left and is initially evacuated. Determine the pressure of the water after the partition has been removed and enough heat has been

    asked by sandhya
  150. Psycology

    Please help me to discuss various discipline which psycology is related to.

    asked by Femi Pesto.
  151. chemistry

    A reaction is first order and it takes 324 minutes for the reaction to be 50.0% complete. How long will it take for the reaction to be 85.0% complete at the same temperature? The answer is 887 minutes but I have no idea how he got that? help

    asked by csb
  152. math

    Question part Points Submissions 1 2 3 0/1 0/1 0/1 0/2 0/2 0/2 Total 0/3 Find three consecutive even integers such that four times the middle integer is equal to the sum of the first and third integers.

    asked by Anonymous
  153. Physics

    For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target

    asked by Steven
  154. AP Chemistry

    How do I calculate orbital hybridization?

    asked by Ana
  155. chemistry

    when doing a flame test: the hydrated salt is overheated and the anhydrous salt thermally decompose, one product being a gas; will the reported value of x be too high, too low on the unaffected?

    asked by Alix
  156. calculus

    Show that the function f(x)=4x^3−15x^2+9x+8 satisfies the three hypotheses of Rolle’s theorem on the interval [0,3]. Then find the values of c on the interval [0,3] that are guaranteed by Rolle’s theorem. Give your answer as a set of values, e.g.,

    asked by esma
  157. physics

    A 3.0 m long, 2.2 kg rope is suspended from the ceiling. Graph the tension in the rope as a function of position along the rope, starting from the bottom.

    asked by Anonymous
  158. Physics

    A) Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, and the gravitational constant G. B) What is the density of the sun ? (The sun's radius is 6.96×108 m). Notice how it compares with the

    asked by Jordan
  159. calculus

    find h'(2) given that f(2) = -3, g(2) = 4, f'(2)= -2 and g'(2)= 7. A. h(x) = 5f(x) - 4g(x) B. h(x) = f(x)g(x) C. h(x) = f(x)/g(x) D. h(x) = g(x)/ 1+ f(x)

    asked by Sasha
  160. Math(Please check answers)

    These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of

    asked by Hannah
  161. minum value

    Find the minimum value for the slope of the tangent to the curve of f(x)=x5+x3-2x

    asked by nazaliah
  162. Math

    I need help in solving this: Problem #1 For f(x)=-6x3+10 find f(4) and f(-4) Problem #2 For g(x)=20-5x2 find f(1) and f(-1)

    asked by Anonymous
  163. college

    200- to 300-word response addressing the following questions: o What everyday changes, if any, might you make to increase the amount of energy expended in your day-to-day activities? o What types and amounts of exercise would work best for you? o Can the

    asked by sandberg
  164. biology

    why is the process of mitosis and meiosis both important to living organism?

    asked by susan marshall
  165. Statistics

    How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?

    asked by Theresa
  166. i need to make my own proverb

    for english class i have to come up with my own proverb. So. i have this idea in my head but im not sure how to say it. The meaning of the proverb is like "you have to work to get things done" so right now i have "A feild never plowed itself" But.. that

    asked by Anonymous
  167. Algebra

    Mixed nuts. Oh Nuts! sells pistachio kernels for $6.50 per pound and almonds for $8.00 per pound. How much of each type should be used to make a 50-lb mixture that sells for $7.40 per pound?

    asked by Lyri
  168. ochem

    A student dissolved 30 mg of a crude unknown in 2 ml of 95% ethanol at room temperature. After chilling in an ice bath and washing crystal with small amount of ice-cold ethanol, she recovered 5mg. Why was the recovery so low?

    asked by Anonymous
  169. math 5th grade

    (17-A)SQUARED=2209 SOLVE FOR A

    asked by kim
  170. chemistry

    the boiling point of diphenyl ether is 259 degrees C. It dissolves many nonpolar compounds but it is a poor solvent for crystallization.Why?

    asked by Anonymous
  171. algebra

    If 8x+16=48 then what does x equal?

    asked by Aubrey
  172. statistics

    Assuming that the population variances are equal for Male and Female GPA’s, test the following sample data to see if Male and Female PhD candidate GPA’s (Means) are equal. Conduct a two-tail hypothesis test at á =.01 to determine whether the sample

    asked by Anonymous
  173. Spanish

    Use the correct form of the verb gustar and the appropriate indirect object pronoun to complete the following dialogue between a babysitter and a difficult child. Cultura ************************************** Shakira Isabel Mebarak Ripoll is a Colombian

    asked by Christopher
  174. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

    asked by Alyssa
  175. Writing Sentences and Paragraphs

    Background You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must describe

    asked by Hyuna
  176. linear algebra

    these equation are certain to have the solution x=y=0 for which values of c is there a whole line of solutions? cx+2y=0 2x+ay=0

    asked by chad
  177. biology

    names and defines the levels of organization that an ecologist studies identifies the level that you would choose to study if you were an ecologist; 3) describes the method or methods you would use to study this level; and 4) gives a reason for your choice

    asked by Anonymous
  178. CHEM 111-O2

    C57H104O6(l)+O2(g) CO2(g)+H20(g)

    asked by KILO
  179. math

    A population of primates in a certain jungle is doubling each year. Describe how the population increases in size as a function of time. Give some example values for this population over time. Is this a linear or exponential relationship?

    asked by Anonymous
  180. calculus

    Specify the region over which the following function f(x) is increasing and the region where it is decreasing. f(x)= √-x Your answer should be either open intervals or the empty set ϕ.

    asked by ana.
  181. geometry

    Solve for the value of y and the measures of angles 1 and 3. m angle 1=(10y+2) m angle 3=(12y-8)

    asked by sarah
  182. physics

    A man lifts a 2.7 kg stone vertically with his hand at a constant upward acceleration of 1.2 m/s2. What is the magnitude of the total force of the stone on the man's hand?

    asked by Kacy
  183. calculus

    Given f(x)= (2x^2 −5x+2) / ( 3x^2 −10x+3) a. find the derivative f
′
(x)
, b. determine the open intervals of increase of f(x)
 c. determine the open intervals of decrease of f(x)
 d. determine the local maximum. Give your answer as (x,y)

    asked by baby
  184. calculus

    Given that x3-axy+3ay2=3a3 Find the equations for the tangent and normal lines at point (a,a)

    asked by mei peng
  185. US History

    Need help with this-- Americans remain an extremely mobile people, with most families moving several times in their lifetime. Write an essay in which you describe at least two similarities and two differences between American migration today and migration

    asked by mysterychicken
  186. College Physics

    The drawing shows a version of the loop-the-loop trick for a small car. If the car is given an initial speed of 4.5 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times?

    asked by Dawn
  187. posting again! please help!! physics

    A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to

    asked by michelle
  188. Physics

    A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race?

    asked by Bala
  189. Physics

    If the force of friction is constant, prove that the stopping distance of a car on a level road varies directly with the square of the initial speed.

    asked by Shaila
  190. math

    Please need help on this Create an equation of a nonlinear function and provide two inputs for your classmates to evaluate. f(x)=10²+5 find f(2) and f(-2)

    asked by Anonymous
  191. algebra

    Elliot is 5 times as old as Sid. Ten years from now, Elliot will be at least 3 times as old as Sid will be then. At least how old is each person now?

    asked by Emily
  192. english

    What is the adverb and then what is the adjective the adverb modifies in this sentence. In spite of her defeat, she was not sad at all? Is is not sad?

    asked by hunter
  193. Physics

    Consider an inefficient engine which draws 200 J of heat from a hot reservoir at 100oC, converts 48 J to work, and rejects 152 J to a cold reservoir at 0oC. Theoretically, how much maximum work can be produced if the efficiency of the engine is maximized?

    asked by Andrea
  194. Chemistry

    How many milliliters of 8.40×10^2M Ba(OH)2(aq) are required to titrate 48.65mL of 5.26×10^2M HNO3?

    asked by Kaylee
  195. english

    List words that give you trouble when writing. If you don’t have any, list words that challenge your spelling ability.

    asked by Anonymous
  196. CHEMISTRY

    I am having trouble understanding how to come up with the products for single replacement reactions. Can any one check my work and tell me what i am doing, and also point out if i am missing any rules. 1. KI + Cl2 ---> 2. Fe + HCl ---> 3. Zn + HNO3 --->

    asked by Help asap!! plz
  197. french

    unscramble please to form sentences ne/passe/elles/ce/s'est/pas/qui/savent

    asked by rona
  198. history

    What books are collected in the Hebrew? The Torah, the Prophets, and Writings that were added later. Is this accurate?

    asked by Reed
  199. English

    Can you please check if everything is OK in the following sentences? Thank you. 1) About fifty miles from Kurtz’s station they saw a hut. When they got nearer to it, they found a massage on the firewood urging them to approach cautiously. Marlow also

    asked by Franco
  200. Statistics

    # Statistics - bobpursley, Wednesday, October 6, 2010 at 4:30pm second applet. Set mean to zero, std deviation to .8 oz check below enter shaded area .05 Notice the answer comes up 1.31 ounces. So the mean must be 5.3+1.31=6.61 Put that in for the mean,

    asked by Beverley
  201. statistics

    How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?

    asked by Theresa llamas
  202. Math(Please help)

    For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there.

    asked by Hannah
  203. physics

    If a person does 80 J of work in moving a 30 \rm{kg} box over a 13 m distance on a horizontal surface, what is the minimum force required?

    asked by Jon
  204. Chemistry

    The water from a hydrated magnesium salt is driven off by heat in a closed system. If the steam generated exerts a pressure of 24.8 atm in a 2.00L container at 120 degrees C, determine the number of moles of H2O driven from the compound.

    asked by Missy
  205. SOCIAL STUDY

    I'M A TRIANGLE MY PERIMETER IS 96 CENTIMETERS THE SIDES ARE 34 CENTIMETERS AND 25 CENTMETERS LONG HOW LONG IS IS MY THIRD SIDE

    asked by LANAH
  206. ENGLISH!!

    What should i write about for the topic: responsibility for watching over your little brother....also explain the various ways you kept him safe...etc. and how you felt responsible for that person. Please give me lots of ideas about what to write for that

    asked by Happy Face-PLZ HELP!!
  207. Algebra

    What is the inverse of y = 4x - 2? Is it y = 1/4x - 1/2 If that is wrong, can you direct me towards the right answer or how to find it Thank you

    asked by Ricky
  208. Physics

    You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. You are 133 m from the intersection when

    asked by Emily
  209. economics

    P 2 3 4 5 6 7 8 9 10 11 12 13 14 QD 400 380 360 340 320 300 280 260 240 220 200 180 160 QS 40 80 120 160 200 240 280 320 360 400 440 480 520 Suppose the quota is lifted and a price ceiling of 11 is imposed. Find the new market price. How much will be

    asked by Mike
  210. MATHS

    How many minutes before 12 noon is it, if one hour ago it was three times as many minutes after 8 am? Thank you

    asked by DONNA
  211. physics

    Find the center of mass of the three mass system given that m1 1.90 kg and m2 1.30 kg Specify relative to the center of the left mass "1.00 kg "

    asked by ami
  212. Math

    Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is

    asked by Hannah
  213. Math

    For f(x) = 2x-3 and g(x)= 2x^2 find, a) (f + g)(x) = My answer is 2x^2 + 2x - 3. Is this correct? b) (f - g)(x) How would you do this? c) (f X g)(2) I do not know what to do since the 2 is there. Determine whether the graph of the following equation is

    asked by Hannah
  214. math

    In an equilateral triangle, if the lengths of the three sides are 5x − 2, 6x − 10, and 4x + c, what are the values of x and c?

    asked by hhguyghu
  215. language arts

    First write one noun of each type below.then write as sentence using the nouns. underline all the nouns in your sentence. common and concrete__________________________________________________________. proper and concrete___________________. please help me

    asked by anonymous
  216. geometry

    The perimeter is 68. Find x,an,BC,AC.if ab is 2x+7,bc is 3x+5, and ac is 5x-4

    asked by chance
  217. Chemistry - Help

    fill in the blanks __________ is matter that has 2 or more different atoms put together.

    asked by Anonymous
  218. math

    if 5 times a number is increase by 5, the result is 30.find the number. A)30 B)7 C)5 D)20

    asked by Anonymous
  219. 6th grade

    A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of this gas?

    asked by Wyeth
  220. finance

    Return on operating assets = 25% Operating asset turnover = 5 times Operating assets = $20 million Degree of operating leverage = 4 times

    asked by Anonymous
  221. Chemistry

    What volume of 0.5 N nitric acid would be required to completely neutralize 300 ml of 1.0 N sodium hydroxide?

    asked by Jeff
  222. Chemistry

    When titrating an acid with a base, a dilute solution of the base is used. When titrating a base with an acid, a dilute solution of acid is used. Why are these titrations done with dilute solutions?

    asked by Jeff
  223. Algebra

    Can someone pleas give me an example of a nonlinear function with 2 inputs? I have to provide 5 problems for class and have no idea where to begin or how to set up the problem.

    asked by Sam
  224. Calculus

    What is the domain and range of the following function? f(x)= - sqrt(-lnx+2) For the domain, I got 0

    asked by Jon
  225. analogy

    month:week:_______:month moon:lunar:sun:_________ snow:cold_______:sweet

    asked by jaylen
  226. French

    I've been given an article and some questions to answer. One of them is: "Au paragraphe deux que veulent dire les mots... a) enjeux b) nouvelle" I can't figure out what the question is asking me to do with those two words.

    asked by Stuck
  227. physis

    if someone dropped a 2.13 kg cannon ball from the 57.3 m tower of pisa, how much did gravity do on the ball

    asked by mini
  228. chemistry

    wHAT IS THE MOLALITY OF A SOLUTION MADE BY DISSOLVING 43.3 GRAMS OF SODIUM CHLORIDE?

    asked by bErNaDeTtE
  229. chemistry

    What is the relative mass ratio of 11.31g of pb and 6.64g of au when pb has 3 mols and au and 2?

    asked by Anonymous
  230. algebra

    evaluate the fraction 3x+5x-6x+2x/x if x=6

    asked by dessiree
  231. AP World History

    I am suppose to write a DBQ tomorrow on the Hans and Romans. My prompt states: analyze the Han and Roman attitudes towards Imperial Power and the State.

    asked by Ashley
  232. Maths

    How must $59 be shared between Michael and Matthew so that Michael’s share is $4 less than twice Matthew’s share?

    asked by Jannie
  233. chemistry

    60.5 grams of iron at an initial temperature of 87.5 degrees celsius are added to 125 grams of water at an initial temperature of 26.7 degrees celsius. calculate the final temperature of the mixture.

    asked by alexja
  234. calculations

    convert the following times from seconds to minutes... 510 sec. 270 sec. 450 sec.

    asked by Anonymous
  235. Composition

    When writing a paragraph there should be a topic sentence and supporting points what would be the readers reactions if there was not?

    asked by Anonymous
  236. Math

    Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is

    asked by Hannah
  237. french

    unscramble please to form sentences ne/passe/elles/ce/s'est/pas/qui/savent. Enfans/demande/moins de/il/aux/bruit/a/faire/de. Mois/ca/nous/des/en contact/que/fait/sommes. Pas/ils/de/ont/paniquer/lui/dit/ne. Rien/n'/a/autre/y/faire/il/d'/a

    asked by rona
  238. English

    I forgot to include these other sentences. I really hope you can have a look at them, too. 1) The jungle had awakened his desires and he didn’t have enough strength to resist them. 2)They met a Russian who traded ivory. He looked like a harlequin in his

    asked by Franco
  239. history

    Who are the Balkans and what relationship do they have with Russia or Germany or WWI?

    asked by Barbie
  240. 5th grade math

    MAKE A SET OF 12 NUMBERS WITH THE FOLLOWING LANDMARKS MAX: 8 RANGE: 6 MODE: 6 MEDIAN: 5

    asked by spencer
  241. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

    asked by Alyssa
  242. algebra 1

    5p+9c+p for c

    asked by John
  243. health

    What are the limitstions of what an organizational chart communicates

    asked by Nancy
  244. Statistics

    Hi Bob, Thanks for the direction. I got so far with it on my own and became stuck. I did as you said but still have one question. Would the answer to the question be 1.31 ounces or 6.61 ounces? I feel the answer is 1.31. Thanks * Statistics - bobpursley,

    asked by Beverley
  245. math

    LPG (liquedfied petroleum gas) is stored in highly insulated spherical vessels in most oil refineries. If the inside diameter of one of these tanks is 11.4ft, find it's volume. Report your answer to the nearest one-tenth of a gal use (pie)=3.14, and 1

    asked by Anonymous
  246. PHYSICS ---HELP!

    Water flows approx. 0 over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

    asked by Leila
  247. Writing Sentences and Paragraphs

    ASSIGNMENT: Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she

    asked by Hyuna
  248. Math(Please check)

    Find the center (h,k) and radius of the following circle. x^2 + y^2 - 6x - 2y + 1 = 0 My answer is center= (-3,-1) and radius of 1. Am I correct?

    asked by Hannah
  249. Algebra

    We just started this topic and I'm confused about these exponents. Simplify [ 11d^2e^5/33d^4e^2]^2 Could you explain the steps Thanks

    asked by DeAnne
  250. geometry

    How do you use the distance formula to see if the segments on a cordinte plane are congruent?

    asked by Roberto
  251. Physics

    A golf club contacts a ball for 0.15 s at angle to horizontal and the ball strikes ground distance from fairway. Initaila speed 25 m/s and angle of projection is 15 degrees Calculate time between ball leaving club and when it first touches ground range of

    asked by LynAnne
  252. Biology

    Can someone please explain how enzymes work? I need to know the parts of one too.

    asked by Ashley
  253. Chemistry 1151

    i have been trying for a few hours now to solve this, but i missed tis day in class and my mind wont wrap around the concept. can someoneplease help?? How many moles of Neon are in a 25mL container at STP?

    asked by Sydney
  254. math models

    What is the classification for this polynomial? 4g^2h^4j^2+3g^6h^8 A. monomial B. binomial C. trinomial

    asked by jackie
  255. algebra

    when dealing with corresponding proportional sides how do you figure out the following: a rectangle with 6.5m on side and 3.7m on base and the other rectangle is 4.0m base and e on side?

    asked by mary
  256. com/155

    Review pp. 517–520. Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives. What is the most effective way to determine

    asked by jackie henton
  257. calculus

    Suppose the function f(x)=2x^3+ax^2+bx has a critical point at x=−1, for which f(−1)=−2. What is a, b?

    asked by ana.
  258. calculus

    Specify the region over which the following function f(x) is increasing and the region where it is decreasing. f(x)=(1) / |x|. Give your answer in open intervals.

    asked by john
  259. PHYSIC

    If a blue car drives 10km/h across the deck of an ocean liner that is traveling at 90km/h, what is the blue car's speed relative to the surface of the water when it drives toward the front of the ocean liner?

    asked by ANA
  260. calculus

    find an equation of the tangent line to the curve y = x √x that is parallel to the line y = 1 + 3x.

    asked by Sasha
  261. General Psychology

    what is the process of repeating information to oneself to keep it in short-term memory

    asked by Rhonda
  262. History

    What would "stock market speculation" mean This is regarding the Great Depression

    asked by Amy
  263. College physics

    The motor of a ski boat generates an average power of 7.30 104 W when the boat is moving at a constant speed of 10 m/s. When the boat is pulling a skier at the same speed, the engine must generate an average power of 8.40 104 W. What is the tension in the

    asked by Sarah
  264. physics

    pitcher throws a ball for 1.98m. the balls mass is .145kg. what is the force on the ball by the pitcher?

    asked by lee
  265. french

    complete the following sentences withthe appropriate articles. le,la,l;,les est-ce que tuas------disques? -----etudiante parle avec le professeur

    asked by v
  266. statistics

    what percent of all students had scores less than 820

    asked by laparis
  267. Psycology

    Identify and explain various discipline psycology is related to.

    asked by Femi Pesto.
  268. algebra

    if 10+5y=77 then what is y?

    asked by Aubrey
  269. biology

    when would and organism need to undergo the process of mitosis and meiosis?

    asked by susan marshall
  270. Algebra-please check

    What is the solution for absolute value of -1 + x = 5 I think the two solutions are x = 6 and x = (-4)

    asked by Tanya
  271. calculus

    Find the rate of change of the distance between the origin and a moving point on the graph y = x^2 + 8 if dx/dt = 8 centimeters per second.

    asked by ale
  272. Math

    The House of Representatives has 435 members. If a committee has a prime number of members, and that number is a factor of 435, then how many members can be on the committee?

    asked by Natalie
  273. Math

    These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of

    asked by Hannah
  274. physics

    an engine block of mass 275kg rest on a plane which is inclined at 13 degrees to the horizontal.if the plane can be tilted to a maximum angle of 21 degrees before the engine block slide due to its weight.calculate the minimum force parallel to the plane

    asked by charles
  275. Math

    hi guys! I was wondering how to do x6-18x2+8 divided by factor x2-4 I normally use synethetic division what else easier method should i use?

    asked by Sabrina
  276. 6th grade, science

    Think about the energy you use every day (running, eating, ...) Where have you seen heat energy being lost? Activity.... Heat lost through

    asked by Victor
  277. management

    how can organizations allocate scarce resources

    asked by patiance
  278. algebra

    is this right? 2/3+3k/4=71/12 y=12/8

    asked by Aubrey
  279. English 1

    I have to write an essasy about "The Man to Send Rain Cloids" and "The Rules of the Game". In my essay I have to identify 3 examples of cultural differences creating conflict. For each of the 3 examples, I have to point out how it helped to create an

    asked by Anonymous
  280. physics

    A spring with a spring-constant 2.2 N/cm is compressed 28 cm and released. The 4 kg mass skids down the frictional incline of heigh 43 cm and inclined at a 22 degrees angle (g = 9.8 m/s^2) The path is frictionless except for a distance of 0.9 m along the

    asked by Mimi
  281. math

    mary's ARt GAllery sells picture for $50each. She pay 20 for print and pay the sales clerk 10% as a commission. she has 5000 of monthly fixed cost as well. how many picture mary need to sell to break even.

    asked by Marha Encarncion
  282. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

    asked by Alyssa
  283. precalculus

    what is 15x^3-22x^2+8x

    asked by ariyonia
  284. English-Writeacher

    Writeacher, I tried to make my composition more sophisticated by adding varied different words instead of repetetive ones. Can you please have a look at this. I really need this by 2:00 pm. I'll appreciate all the help you can give me, thanks.

    asked by Sara
  285. math

    If you already know the mean and all her test scores but one, how can you find the missing tes score?

    asked by India
  286. math

    How do I make a math factor tree using the number 115 and make it look like a tree for real?

    asked by lanette
  287. Chemistry

    Is CaCl2 a solid or is it soluble? I know Ca is is insoluble...

    asked by Mike
  288. sci245

    hi. please help. i need to do a presentation for weathering and erosion and i am not sure what the graphical representation means. does this mean photos or graphs? please help.

    asked by amy
  289. social studies

    whats the effect on climate for these listed below?: sun and location wind water mountain

    asked by me
  290. science

    what are centrioles

    asked by Anonymous
  291. Bio

    Given an allele frequency of o.91 for a hypothetical red allele (bead), the percentage of blue alleles residing in the heterozygotes would be? a) 89% b) 90% c) 91% d) 92% e)93% i don't even know how to approach this question

    asked by kim
  292. math 115

    dID IU do this right not sure and I thank you for helping ahead of time... 1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that

    asked by Donna
  293. biology

    names and defines the levels of organization that an ecologist studies

    asked by Anonymous
  294. science

    is a rock a compound, element, or solid?

    asked by rachel
  295. algebra

    write fur dfferent numbers for which both of there statement are true the range is 8 the mean and median are the same number

    asked by Anonymous
  296. Algebra

    How do you solve 2x^2 - 20 = 3x Thank you

    asked by Annie
  297. Science

    can u please help me unscramble "IRITONCF" and "LCRNEAU"

    asked by Nikki
  298. chemistry

    What are the three chemical reasons for the large negative energy of hydrolysis of phosphoric acid anhydride linkage for compounds such at ATP, ADP, AND pyrophosphate?

    asked by nikki
  299. algebra

    An equivalent expression of h+zx

    asked by Melvin
  300. English

    I tried to correct the wrong sentences myself. Please, tell me if everything is ok. 1) Then, Marlow went into the broken-down hut and found an old book about seamanship with notes written in code. 2) He came to Africa with the intention of civilizating the

    asked by Franco
  301. algebra

    If n x 2 = 28, then what does n equal

    asked by allicia
  302. Consumer affairs and business

    ”.Reflect on how you would work with a client to advise them on the importance of insurance to manage risk. How would you address their reluctance to spend money on premiums when they may never file a claim? Refer to course content in your reflection (If

    asked by troy
  303. Math

    What are good examples of functions with horizontal asymptotes of 5?

    asked by John
  304. Chemistry 1151

    How many oles of Neon are in a 25mL container at STP?

    asked by Sydney
  305. chem-follow up question to previous post

    how do you calculate the molar mass?

    asked by sara
  306. calculus

    Given the function g(x)= (3x) / (2+5x^2 ) find its region of increase and decrease. Give open intervals.

    asked by ana.
  307. Math-Algebra-Please check

    What is the solution of 3 times the absolute value of x + 5

    asked by Tanya
  308. algebra

    What is the answer to 7(d+5d) - 16d

    asked by Jacob
  309. geography

    was the china's one child policy successful? need opinions thank you

    asked by chelsea
  310. Algebra1

    What is the answer to 8-(-n)=1? I have tried to figure this out, and I can't.

    asked by janet
  311. English

    Can anyone here tell me any of the stories you used to tell your kids of your past lifes? I need to write one for English, and my mom doesn't want to tell me one. I just need examples.. or maybe you guys can give me a story I can use? ^.^ Just a story you

    asked by Allyson
  312. geometry

    In the figure below, B is the midpoint of , AB = 5x + 2, and AC = 12x – 2. What is the value of BC?

    asked by Kayla
  313. algebra

    1/6h=9

    asked by emma
  314. physics

    what force is being applied to a meteor with a mass of 500 kg as it travels at a constant velocity of 5000 meters per second?

    asked by judith
  315. math

    A 270 in pipe is cut into twp pieces. One piece is twice eight time the length of the other. Find the lengths of the pieces.

    asked by Daniel
  316. math

    3 3/4 YD= ? in A)60 B)45 C)120 D)135 i think it is d

    asked by Anonymous
  317. Education Theory and Practice

    Name and discuss factors that describe teaching as a profession.

    asked by Ebenhard
  318. assessment of learning

    When to use an identification type of test? Steps or guidelines in making an identification type of test. Thanks.

    asked by klarmaesen
  319. biology

    what would happen if Meiosis did not occur?

    asked by susan marshall
  320. chemistry

    If 2.10 kJ of heat is needed to raise the temperature of a sample of metal from 10.°C to 28°C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 34°C to 57°C?

    asked by ruby
  321. chem

    My liquid boiled at 96.29 F. It is odorless and transparent. It could be water with salt. Cant be sugar inside becuse that would cause water to boil above 212F/100C. Water boils at 212F. What is my liquid?

    asked by Cherry Joy
  322. social studies

    how would you describe the location of each of the 5 regions

    asked by ayiana
  323. Math

    Jared obtained a simple interest loan for 1200 at a credit union at an annual interest rate o f 5.5%. if Jared paid $1430 to repay the loan, for how many months, was the money borrowed ? ( can you please tell me the steps. thanks )

    asked by thommini
  324. Chemistry

    Is CaCl2 a solid or is it soluble? I know Ca is is insoluble...

    asked by Mike
  325. math

    thank you so much reny! but i was wonndering how can you factor x8-2x6+x5+x4-x3+x+1 by x3+1 THANK YOU SOOO MUCH!

    asked by Sabrina
  326. algebra

    m=-3 passing through p(3.5)

    asked by james
  327. english

    What is the complete and simple subjects for the sentence Some people like to take classes to learn new things.

    asked by Anonymous
  328. Science

    what activity does the cytoplasm do for the diatom

    asked by Teri
  329. physical ed sports

    name the six positions on a volleyball court IN SERVING ORDER(1st-6th)beginning with the first player serve.

    asked by Kim
  330. social studies

    what is the defenition of grids?

    asked by hippie
  331. chemistry

    Can thermodynamic quantity, delta G, be used to predict the speed of a reaction in a living organism? Why and why not?

    asked by nikki
  332. college statistics

    In Chapter 5, Exercise 9, we studied the variability of crime rates and police expenditures in the eastern and Midwestern United States. We’ve now been asked to investigate the hypothesis that the number of crimes is related to police expenditures per

    asked by jason
  333. Math 116

    Is this correct so far...I just want to know if I am doing this.. b) The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000.

    asked by Donna
  334. Algebra-Can you please check this Reiny

    Can you check this: x^-3y^2/x^2y^-4 I think the answer is y^6/x^5 Thanks for explaining the other problem

    asked by DeAnne
  335. management

    With increasing globalization, how can organizations allocate scarce resources? where should I look for information?

    asked by patiance
  336. science

    I am trying to figure out how to teach young students, say 3rd/4th grade the six steps of the scientific method in a simplified way they would understand...Any ideas?? Any examples/and /or sites?? Thanks, jarrad

    asked by Jarrad
  337. psychology

    Did you ever have a "déjà vu" experience?do you think they really happen to people? How do you explain such experiences? What do you think of the idea of "déjà vu"?

    asked by keisha
  338. Chemistry 1151

    what is the pressure of a 0.85 Liter sample of Helium with a mass of 0.070 grams when it is at 5 degrees Celcius?

    asked by Sydney
  339. Math

    What are 12 numbers with these landmarks maximum 8 range 6 mode 6 median 5

    asked by noneofyourbeeswax
  340. math models

    What is the classification for this polynomial? 4g^2h^4j^2+3g^6h^8 A. monomial B. binomial C. trinomial

    asked by jackie
  341. calculus

    Find the minimum of the function f(x)= x^2 – ((54 ) / (x) ).

    asked by john
  342. com/155

    I received my first major credit card at the early age of eighteen. I was positively not ready for that responsibility. Shopping carelessly was not a wise decision. Within six month's, my credit was suffering tremendously. I had already reached my credit

    asked by jackie henton
  343. Science

    A boy walks a total distance of 210 km due North. His starting position is at 20 km and his final position is 34 km. If it takes him 3 hours and 20 minutes to make this trip, what is his total velocity? What is his speed?

    asked by Martha
  344. Algebra

    The profit from selling x pieces of handmade jewelry can be modeled by the equation P(x)=-x^2+130x-3000. What is the range of profitable orders (P(x)>0)?

    asked by Roger
  345. Algebra 115

    Is this correct so far...I just want to know if I am doing this.. b) The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $3,300,000.

    asked by Donna
  346. English

    Can you please tell me if the following sentences are correct? 1) What happened to Robinson on his second voyage to Africa? 2) How did he manage to set himself free? Thank you.

    asked by Franco
  347. minum distance

    Find the minimum distance from the point (3,0) to y=(x)^1/2

    asked by selina
  348. Science

    whats the cause of someone bleeding from their face without a cut, bruise, pimple, nothing, the person is just bleeding constantly, why?

    asked by alanaR.
  349. math 117

    Living in or near a metropolitan area has some advantages. Entertainment opportunities are almost endless in a major city. Events occur almost every night, from sporting events to the symphony. Tickets to these events are not available long and can often

    asked by Tina
  350. social studies

    how has equal oppurtunity helped our economy?

    asked by misy
  351. math

    6+y=17

    asked by emma
  352. science

    what force is being applied to a meteor with a mass of 500 kg as it travels at a constant velocity of 5000 meters per second?

    asked by judith
  353. Geography

    How do the shores of Long Island differ from each other. The South Shore and he North Shore

    asked by Dylan
  354. french

    do you use le,la,l',les for this question? Ou,est-------- ordinateur?

    asked by valerie
  355. math 115

    I am stuck with this problem can some let me know how to work this problem please help me The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are

    asked by Donna
  356. Science

    What are the different forms of the same gene referred to as?

    asked by Jim
  357. math 115

    I am stuck with this problem can some let me know how to work this problem please help me The representative tells you that floor plan #1 sells for $300,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are

    asked by Donna
  358. algebra

    if you buy 10 pizzas and cheese pizzas cost $11, write equation giving the cost "C" in dollars as a function of the number "P" of cheese pizzas you buy

    asked by Don
  359. math

    if 15 students perfer strawberry ice cream, how many students are in norman's class

    asked by kyla
  360. math

    the lappans buy 3 large sandwich wraps to serve at a picnic. Nine people in all will be at the picnic. show 3 different ways to cut the sandwiches so that each person gets an equal share. Help please!!!

    asked by Jackie
  361. science

    is the following definition of smog correct: Smog is a mixture of smoke and fog or a noxious mixture of air pollutants that can often be seen as a haze in the air.

    asked by Beauty
  362. English

    Write a note on the characterstic features of 'Hamlet' by william shakespeare.

    asked by Anonymous
  363. social studies

    what are the texas subsections?

    asked by Anonymous
  364. psych

    what are the psychoanalytic models? How have these models been used to explain human behavior? Which models do you feel is the most effective explaining human behavior and why?

    asked by diana
  365. 12th grade

    deductive reasoning

    asked by kerri
  366. math

    how to factor 9x8-745x4+1296 by 9x4-16?? Thankyou!!

    asked by Sabrina
  367. chem

    what formula do you use to determine mass percent of water?

    asked by dude
  368. math

    If 250,148,571 is the total population what percent is 136,800,000?

    asked by zane
  369. math

    659 x 1357=1357 x n n=

    asked by emma
  370. math

    how can i drop an egg 4 feet without breaking it

    asked by isabel
  371. science

    how much force is excerted by a 25kg rock rolling down a hill at 3 meters per second per second?

    asked by judith
  372. math

    20xy=? I do not get this at all! Please HELP!

    asked by renee
  373. English

    I checked my sentences once more. I included the last sentences for you to correct. Thank you. 1) The natives loved him because he had the guns and they hadn't seen anything like them before. 2)He was looked up to by the natives because of his guns. 3)The

    asked by Franco
  374. 6th grade

    I NEED EXAMPLES OF ARCHIPELAGO

    asked by alex