# Questions Asked onOctober 6, 2010

1. ## 8th grade

what do you call someone who cant turn pancakes?

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

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?

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

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.

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

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

8. ## chemistry

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

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

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

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?

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

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

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,

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

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?

17. ## chemistry/thermochem

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

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?

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

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

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.

22. ## 3rd grade

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

23. ## math

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

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

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

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

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

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

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

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

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

34. ## science

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

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

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?

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

39. ## AP Chemistry

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

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

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?

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

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.

44. ## chemistry

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

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

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?

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

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

49. ## Math 2nd grade

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

50. ## Chemistry

How would I determine the electronegativity of Ethanol?

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?

52. ## 2nd grade

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

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

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.

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.

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.

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?

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?

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

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

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

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

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!

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

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?

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

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.

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

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?

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?

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

72. ## physics

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

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

74. ## bus stats

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

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)

77. ## chemistry

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

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

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!

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

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

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

88. ## CHEM 111-O2

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

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.

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

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?

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

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?

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?

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?

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

97. ## analogies

dollar:cent;meter:_________

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

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?

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

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

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

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?

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

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.

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.

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

108. ## chemistry

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

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?

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.

111. ## chem

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

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!

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?

169. ## math 5th grade

(17-A)SQUARED=2209 SOLVE FOR A

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?

171. ## algebra

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

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

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

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?

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

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

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

178. ## CHEM 111-O2

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

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?

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.

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)

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?

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)

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

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?

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

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?

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.

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)

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?

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?

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?

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?

195. ## english

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

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

198. ## history

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

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

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,

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

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.

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?

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.

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

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

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

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

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

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 "

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

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

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?

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

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

217. ## Chemistry - Help

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

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

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?

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?

283. ## precalculus

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

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.

285. ## math

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

286. ## math

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

287. ## Chemistry

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

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.

289. ## social studies

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

290. ## science

what are centrioles

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

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

293. ## biology

names and defines the levels of organization that an ecologist studies

294. ## science

is a rock a compound, element, or solid?

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

296. ## Algebra

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

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?

299. ## algebra

An equivalent expression of h+zx

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

301. ## algebra

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

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

303. ## Math

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

304. ## Chemistry 1151

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

305. ## chem-follow up question to previous post

how do you calculate the molar mass?

306. ## calculus

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

307. ## Math-Algebra-Please check

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

308. ## algebra

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

309. ## geography

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

310. ## Algebra1

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

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

312. ## geometry

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

1/6h=9

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?

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.

316. ## math

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

317. ## Education Theory and Practice

Name and discuss factors that describe teaching as a profession.

318. ## assessment of learning

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

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?

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

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

335. ## management

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

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

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"?

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?

339. ## Math

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

340. ## math models

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

341. ## calculus

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

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?

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)?

359. ## math

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

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!!!

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.

362. ## English

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

363. ## social studies

what are the texas subsections?

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?

365. ## 12th grade

deductive reasoning

366. ## math

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

367. ## chem

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

368. ## math

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

369. ## math

659 x 1357=1357 x n n=

370. ## math

how can i drop an egg 4 feet without breaking it

371. ## science

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

372. ## math

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