Questions Asked on
February 9, 2014

  1. Science

    What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor

    asked by Steve
  2. math

    Brett made a scale drawing of a rectangular room in his house. The actual length of the room is 12 4/5 ft. The scale used to make the drawing was 1/4 in.=1 ft. What is the length, in inches, of the room on the drawing?

    asked by Miki
  3. physics

    A cue ball initially moving at 2.6 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s final speed is 1.3 m/s.Find the cue ball’s angle θ with respect to its original line of motion. Consider this to be

    asked by Anonymous
  4. Physics

    Oasis B is a distance d = 7.0 km east of oasis A, along the x axis shown in the figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 22 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 34

    asked by Robin
  5. MATH?!!?

    a store sells ladders. . the retail price was a 40m percent markup over the manufacturer price. .a month later, the store reduced the retail price of the ladder by 25 percent What percent markup is the new retail price over the manufacturer price?

    asked by Abi
  6. Physics

    A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y axis points vertically upward. The acceleration of gravity is 9.8 m/s^2. a.Neglecting air

    asked by Fabricus
  7. English

    Read the conversation at a peer review for Ben’s short story. “It seems your central character has a really cool power: being able to hear what others are thinking,” Tom said. “Actually, I think it was more of a jinx,” replied Ben. “Being able

    asked by kimberly
  8. math!!!!

    One lap around the track is equal to 1/8 of a mile. A horse ran a distance of 9 laps in 2 minutes and 30 seconds. What was the horse's average speed in miles per minute?

    asked by Lidia
  9. Organic Chemistry

    Why is crotyl chloride more reactive than 1-Chlorobutane under SN2 conditions

    asked by Anonymous
  10. Geometry

    A ladder leaning against a house makes an angle of 60 degrees with the ground. The foot of the ladder is 7 ft from the house. How long is the ladder?

    asked by Evra
  11. Precalculus

    A drinking glass 5 inches tall has a 2.5 inch diameter base. Its sides slope outward at a 4 degree angle. What is the diameter of the top of the glass?

    asked by eliguti
  12. science

    Which type of mechanical energy do the following contain? Kinetic Energy, Potential Energy, or Both A Car traveling at 100 mph along a flat road - KE A rubber band that has been stretched - PE A bowling ball rolling down a lane - both A piano lifted to a

    asked by cee
  13. Physics

    If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 5 meters per second, how high can it jump above water?

    asked by Alex
  14. Chemistry HELP

    Complete combustion of 3.30 g of a hydrocarbon produced 10.2 g of CO2 and 4.68 g of H2O. What is the empirical formula for the hydrocarbon? I did the calculation and the ratio comes out to C: 1 H: 2.24 So I thought the answer is CH2 but apparently its

    asked by Alz
  15. MATH

    john mixed 3/4 liter of yellow paint with 1 1/4 liters of red paint to make 2 liters of orange paint. . He needed more orange paint. . To make a new batch of orange paint, he used exactly 1 liter of red paint. Using the same ratio, how many liters of

    asked by Miki
  16. CHEMISTRY

    6. The H atom and the Be3+ ion each have one electron. Does the Bohr model predict their spectra accurately? Would you expect their line spectra to be identical? Explain.

    asked by Sajeth
  17. Science

    which is a chemical property of aluminum a- melting point is 660c b- boiling point is 2519c c- does not dissolve in water d- reacts with oxygen My answer is D

    asked by Steve
  18. CHEMISTRY

    4. The human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0 x 10-17 J of energy to trigger a series of impulses that eventually reach the brain. (a) How many photons of red light (700.0 nm) are needed? (b) How

    asked by Sutheshan
  19. economic

    10. Suppose, unfortunately , your mathematics and economics professors have decide to give tests 2 day from now and you can spend only a total of 12 hours studying for exams .After some thought, you conclude that dividend your study time equally between

    asked by thiti
  20. physical science

    Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.

    asked by sky
  21. economic

    Suppose, unfortunately , your mathematics and economics professors have decide to give tests 2 day from now and you can spend only a total of 12 hours studying for exams .After some thought, you conclude that dividend your study time equally between each

    asked by thiti
  22. Physics

    You are driving through town at 12m/s when suddenly a ball rolls out aim front of you. You apply the brakes and begin decelerating at 4ms^2. How long does it take you to stop? The answer I got is -3 is that possible!!!!??! I'm not sure what doing wrong.

    asked by Mya
  23. math

    Gina is adding a lace border to a circular pillow. The radius of the pillow is 8 inches, and she needs to decide how much lace to buy. Which length represents the least amount she can buy? 1) 26 inches 2) 51 inches 3) 101 inches 4) 202 inches p=2pir p=2pi8

    asked by B8
  24. Physics

    Police find skid marks 60 m long on a road showing where a car made an emergency stop. Assuming that the deceleration was -10m/s2, how fast was the car going?

    asked by Jeff
  25. statistics

    Find the probability that among six randomly selected people, exactly four of them have brown eyes. Assume that 40% of the population has brown eyes

    asked by mike
  26. phys

    An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s^2 west for 3 seconds. During this time the object travels a distance of:

    asked by jay
  27. economic

    6. The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a) Plot the production possibility data. What is the opportunity cost of the first

    asked by thiti
  28. chemistry

    What [Ag1+] is required to start precipitation of AgOH from a saturated solution of Mg(OH)2? Ksp = 2.4 ✕ 10-8 for AgOH and Ksp = 2.6 ✕ 10-11 for Mg(OH)2

    asked by Danielle
  29. Algebra 1 (Reiny!)

    A piece of 8.5-by-11-inch cardboard has identical squares cut from its corners. It is then folded into a box with no lid. The volume of the box in cubic inches is 4c^3 - 39c^2 + 93.5c, where c is the side length of the missing squares in inches. a. What is

    asked by Anonymous
  30. Algebra 1

    A company buys a sweater for $14 and marks it up 90%. It later discounts the sweater 25%. A. Find the original selling price of the sweater. B. How much was the discount? C. Found the sale price after the discount. D. The company's profit on the sweater

    asked by Jynessa
  31. Physics

    You're driving down the highway at 20m/s when you see a dog you don't want to crush it 35 m in front of you. Your reaction time before stepping on the brakes is 0.5s, and acceleration created by your brakes is 10 m/s^2 what was the distance travelled

    asked by Mya
  32. math;)

    a kitchen is shaped like a rectangle with dimensions of 11 1/2 ft. by 9 1/2 ft. the floor of the room is made of square tiles with a side length of 1.2 ft. What is the number of tiles that will cover the kitchen floor?

    asked by May
  33. statistics

    The height of an adult male is known to be normally distributed with a mean of 69 inches and a standard deviation of 2.5 inches. The height of the doorway is 74 inches. What proportion of adult males will not fit under the door?

    asked by judy
  34. math

    A student has 4 English books,3 math books,and 5 history books.In how many ways can these books be arranged on a shelf if the books in same subjects must be kept together?

    asked by mehwish
  35. Science

    what has a definite shape and volume a- solid b- liquid c- gas d- molecule My answer is A

    asked by Steve
  36. chemistry

    1.)Calculate the number of moles in 3.50 x 10^21 atoms of silver. Show all work. 2.) Calculate the number of atoms in 2.58 mol antimony. Show all work 3.) Determine the mass of 1.45 mol FePO4. Show all work. 4.) Calculate the number of mol in 6.75 g of

    asked by Raina
  37. Chemisty

    An excess of aqueous AgNO3 reacts with 43 mL of 5 M K2CrO4(aq)to form a precipitate. what is it? What mass of precipitate is formed? answer in g

    asked by Anonymous
  38. Physics

    You're driving down the highway at 20m/s when you see a dog you don't want to crush it 35 m in front of you. Your reaction time before stepping on the brakes is 0.5s, and acceleration created by your brakes is 10 m/s^2 what was the distance travelled

    asked by Mya
  39. algebra

    Jose has 6 more dimes than quarters. He has $1.65 total. How many coins of each type does he have?

    asked by frankie
  40. O CHem

    Why is crotyl chloride more reactive than 1-Chlorobutane under SN2 conditions

    asked by Anonymous
  41. physical science

    If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.

    asked by sky
  42. Social Studies

    What is the most likely result of incomes not rising as quickly as inflation? A. People are able to buy fewer goods and services. B. The unemployment rate rises as more people look for jobs. C. Many people decide to leave the labor force. D. Consumers buy

    asked by Anonymous
  43. physics 1

    Only two forces act on an object (mass=4.00 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.

    asked by Anonymous
  44. economic

    Draw a production possibilities curve for a hypothetical economy producing capital good and consumer goods. Suppose a major technological breakthrough occurs I the capital goods industry and the new technology is widely adopted only in this industry. Draw

    asked by thiti
  45. chemistry

    In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO DrBob222 you said you would choose the answer d and I should know how to figure this out. I

    asked by Lisa
  46. Physics

    suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it

    asked by Juanita
  47. Social Studies

    How are interest rates and wages similar? A. Both rise due to inflation B. Both are types of prices B

    asked by Anonymous
  48. Chemistry

    The Haber process is used to synthesize ammonia from hydrogen and nitrogen. How much hydrogen is required to produce 42.8 kg of ammonia?

    asked by Jesus
  49. Geometry

    Maria is making a stained glass window in the form of a kite. The width of the window must be 15 in., and she only has enough stained glass to cover 60 in. What should the height of the window be? A. 4 in. B. 6 in. C. 8 in. D. 12 in.

    asked by anon
  50. science/physics

    If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

    asked by CC
  51. Geometry

    Andrea has a yard shaped like parallelogram ABCD. The garden area, parallelogram EFGB, has an area of 105 ft. If Andrea wants to sod the rest of her yard, how many square feet of sod should she order? A. 765 ft B. 840 ft C. 945 ft D. 1,515 ft

    asked by anon
  52. Chem

    What gas law explains why hot water diffused the food coloring faster than the cold water?

    asked by McKenna Louise
  53. Chemistry

    Hi I was hoping to get some help on this. It's review for my chemistry text on Monday and I would be grateful if someone could help me out. My teacher has been out for two weeks but we still have to know this material. 1. The following data was collected

    asked by Matt
  54. Chemistry

    Find the mass of carbon dioxide that can be produced from 0.01 mols of calcium carbonate

    asked by D.M.I st EUGENE UNIVERSITY
  55. intermediate algebra

    A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 10% per year. If the interest earned in the first year is $650, how much did she invest in each account?

    asked by zerick
  56. chemistry

    the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: a. TlTe b. Tl3Te2 c. Tl2Te3 d. Tl2Te

    asked by Lisa
  57. Physics

    Three vectors are given by a= 0i+0j+4.0k , b= 3.0i+ -3.0j+-1.0k and c=1.0i+2.0j+-1.0k. Find (a) a(bxc) and (b)a(b+c)

    asked by Robin
  58. Physics

    A sand bag is dropped out of a balloon traveling upward at speed of 2.3m/s. A kiddo drops a bag at the instant the balloon is 34m above the ground. How long does it take the sand bag to hit the ground? I got -2.41s why?

    asked by Sally
  59. physics

    A man is in a boat out away from shore. Th mass of the man, the boat and everything in it is 210 kg. The boat is not moving. The man throws and anchor with a mass of 26 kg straight out from the boat with a speed of 6.6 m/s. What is the resulting speed of

    asked by jim
  60. math

    rewritten as a power of 2 with a rational exponent, the expression 4*squared root of 2 would equal which of the following. 1) 2 so 2 is just 2 2)2^2 which would =4 3) 2^5/2 this =5.65 4)2^5 this=32 4*square root of two=5.65 so I believe the answer is 3. Is

    asked by B8
  61. Math

    The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be in the top 10 % of students

    asked by Ashley
  62. Algebra 2

    Can someone please explain how to do this problem? Woodrow wins a tic-tac-toe game 65% of the time when he chooses the first square and 32% of the time when his opponent chooses the first square. The player who plays first is chosen by a coin toss. What is

    asked by Jane
  63. Chemistry

    a chemist wants to make 5.5L of a .3M Cacl2 solution. What mass of CaCl2 should the chemist use?

    asked by Charessa
  64. Maths

    Covert 200g cake flour to kilogram

    asked by Okgethilwe
  65. Physics

    A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return.

    asked by Alma
  66. Chemistry

    6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates

    asked by Lisa
  67. Physics

    A vector with a magnitude of 17.6 m is directed at angle θ = 43o counterclockwise from the +x axis. What are the components (a) ax and (b) ay of the vector? A second coordinate system is inclined by angle θ' = 20o with respect to the first. What are the

    asked by Robin
  68. Social Studies

    Which of these goods or services is paid for with federal taxes? A. community roads B. military bases C. public universities D. police protection

    asked by Anonymous
  69. chemistry

    Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.30mm .

    asked by Anonymous
  70. Physics

    A motorist drives north for 33.0 minutes at 77.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.80 h. a) What is his total displacement in km? b) What is his average velocity km/h?

    asked by Meg
  71. Mathe

    The number has two digits. Both of the digits are even.the digit in the tens place is greater that the digit in the unit (or ones) place.the units (or ones digit) is not in the three times table. The tens digit is not double the ones digit. The sum of the

    asked by John
  72. algebra

    a scarf was cut into 6 pieces, each with a length greater than 5 inches. How long could the original scarf have been?

    asked by eddie
  73. math

    Help please >.< The Hotel Lakewell has 450 rooms. Currently the hotel is filled . The daily rental is $ 750 per room. For every $ 4 increase in rent the demand for rooms decreases by 7 rooms. Let x = the number of $ 4 increases that can be made. - What

    asked by Clara
  74. Physics

    A particle moves according to the equation x= (10 m/s^2)t^2 where x is in meters and t is in seconds. a. Find the average velocity for the time interval from t1= 2.38 s to t2= 4.3 s. Answer in units of m/s. b. Find the average velocity for the time

    asked by Layla
  75. Science

    Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH

    asked by Oladimeji Taofeek
  76. economic

    The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a.)Plot the production possibility data. What is the opportunity cost of the first

    asked by thiti
  77. math

    One weekend, there were 95 pizzas ordered for the sophomore dorm. That weekend 19 customers ordered their pizza with just pepperoni, 17 customers ordered their pizza with just sausage, 18 ordered theirs with just onions, 15 ordered theirs with pepperoni

    asked by joe
  78. Algebra 1

    A television is on sale for $300. If the sale price is 30% less than the regular price, what is the regular price?

    asked by Jynessa
  79. Algebra 2

    Can someone please check my answers? Find the probability of drawing the given cards from a standard !@#$%^& of 52 cards (a) with replacement and (b) without replacement. 1.A red card, then a black card a. 1/4 b. 13/51 2.A ten, then the ace of hearts a.

    asked by Jane
  80. physics

    a stone is thrown vertically upward with a speed of 10.5 m/s from the edge of a cliff 76.0 m high. how much later does it reach the bottom of cliff? what is its speed just before hitting? what total distance did it travel

    asked by jo
  81. physical science

    A horizontal force of 100 N is required to push a box across the floor at a constant velocity. a) Show that the net force acting on the box is zero. b) Show that the friction force that acts on the box is 100 N.

    asked by sky
  82. AP Chemistry- Equilibrium

    If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.

    asked by Danielle
  83. Physics

    A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return.

    asked by Alma
  84. math

    In a survey of 25 college students, it was found that 9 were taking an English class, 14 were taking a math class, and 8 were taking both English and math. How many students were taking a math class only

    asked by joe
  85. Physics

    For the vectors with a = 3.3 and b = 2.2, what are (a) the z component of AxB, (b) the z component of AxC, and (c) the z component of BxC?

    asked by Robin
  86. physics 2 for college

    a jet propelled motorcycle start from rest moves in a straightline with constant acceleration and covers a distance of 64m in 4seconds.?

    asked by Jayson
  87. physics

    A balistic pendulum is made from a block of wood with a mass of 2.78 kg. A bullet with a mass of 39 g is shot into the block causing it to rise 29.1 cm. What was the speed of the bullet?

    asked by dean
  88. Math Mixture Word Problem

    How much water must be added to 1 liter of a 5% saline to get a 2% saline solution

    asked by Anonymous
  89. English

    Which verb should I use and why? Either the wild dogs or the baboon makes or make that howling sound. I think since dogs is plural it should be make?

    asked by Kelly
  90. math

    A bag of buttons contains 3 red, 4 orange, 7 green and 10 blue battens. How many orange buttons should be added so that makes up 1/4 of the total? (Remember, if you add more orange buttons, your total buttons will also increase.) Pla help due tomorrow

    asked by anne
  91. chemistry

    A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution

    asked by Mary
  92. INF 103

    Digital literacy is a skill that is important for: utilizing computers effectively. counting numbers reading digits. hacking computer information.

    asked by Annie
  93. Math

    A bag of buttons contains 3 red, 4 orange, 7 green and 10 blue battens. How many orange buttons should be added so that makes up 1/4 of the total? (Remember, if you add more orange buttons, your total buttons will also increase.)

    asked by Nandani
  94. Algebra

    Find the slope or pitch of the roof. I need both the slope and pitch. 13ft | |__13.8ft The pitch of the roof is__% (round to the nearest percent as needed)

    asked by Student5
  95. chemistry

    the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: Please show. thank you

    asked by Lisa
  96. Science

    Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH

    asked by Oladimeji Taofeek
  97. chemistry

    In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO

    asked by Lisa
  98. Physics

    Can an object with constant acceleration reverse it's direction of travel? I think it's yes because when a ball is thrown in the air it has a constant acceleration of gravity and the acceleration continues when it reverses it's direction. Am I right??

    asked by Kevin
  99. physics

    A block of wood with a mass of 4.62 kg sits on the edge of a table that is 0.99 m tall. A bullet with a mass of 70.5 g traveling with a speed of 450 m/s is shot into the block and is lodged in it. Assuming that no energy is lost to friction, how far from

    asked by dean
  100. Visual Basic...Please help!

    Design and develop a simple system that computes the Depreciation cost of the item (D). Takes as input the purchase Price of an item (P), its expected number of years of Service (S), and Yearly depreciation for the item (Y). Use the formula D= P-(S/Y).

    asked by Jnr John
  101. Calc

    The temperature of a chemical reaction, t seconds after the reaction starts, is given by: T(t)= 20+5.25t^.75 degrees F , What is the average temperature during the whole process, if the reaction lasts for 4 minutes and 16 seconds ?

    asked by Rebekah
  102. chemistry

    With a halogen X, a metal M forms ionic compounds MX, MX2 and MX3. The lattice energies of the compounds are -1340, -3840 and -7020 kJ/mol, respectively. The ionization energies of the metal are 360 (for M+), 1236 (M2+) and 2990 (M3+) kJ/mol and the

    asked by Minttu
  103. English

    Hello. I will appreciate it if you help me with a few questions. 1) Is it possible to say "protesters gathered ON the square" or is it IN or AT? 2) Is it necessary to use the article in the context: a) 'Pope Francis blessed (the?) pilgrims in St Peter's

    asked by Nalmi
  104. physics

    Buffy is rolling along in her 11.1 kg wagon at 4.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.5 m/s relative to the ground. This causes her wagon to go speeding forward at 13.03 m/s relative to the

    asked by jim
  105. Physics

    You buy yourself a new Lamborghini which can accelerate from 0 to 62 mph in 2.5 seconds. 1.) what is the magnitude of the car's acceleration in SI units? 2.)the latest figures on speeding related car accident fatalities show 32788 deaths per year in the

    asked by Juanita
  106. Physics

    suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it

    asked by Juanita
  107. phyical science

    A 250 g yo-yo is swung on the end of a 50 cm string at a constant speed of 4 m/s. The centripetal force acting on the yo-yo is

    asked by Anonymous
  108. algebra & trigonometry

    A person wants to purchase two types of items, A and B, from a shop. She has $200 to spend, and she has to purchase at least 10 items. If the price of one unit of each A and B is $10 and $30, respectively, represent this problem graphically.

    asked by daniel
  109. math

    how to solve linear functions f(x)= 2x if x greater than or equal to -1 x-1 if x less than -1

    asked by sheri
  110. physics

    A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.840 m/s at an angle of 36.0° above the table, and it lands on the magazine 0.0710 s after leaving the table. Ignore air resistance. How thick

    asked by evy
  111. Physics

    In the sum A+B=C, vector A has a magnitude of 10.2 m and is angled 48.0° counterclockwise from the +x direction, and vector C has a magnitude of 15.0 m and is angled 22.0° counterclockwise from the -x direction. What are (a) the magnitude and (b) the

    asked by Robin
  112. Physics

    A calorimeter with specific heat of 490x10^2J/kg^1K^1 has a mass of 2.00x10^-1kg that contains 3.00x10^-1kg of liquid water at 40C. If 5.00x10^-2kg of ice at 0C is dropped into the water. Find the final temperature of the mixture where the ice has melted

    asked by Tsunayoshi
  113. English

    What is parallelism, please?

    asked by Albert
  114. physics

    passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the

    asked by nandeve
  115. Maths

    Calculate the simple interest on R3 500 invested at 6% per annum for 3 years

    asked by David
  116. Physics

    a vector with a magnitude of 17.6 m is directed at angle θ = 43o counterclockwise from the +x axis. What are the components (a) ax and (b) ay of the vector? A second coordinate system is inclined by angle θ' = 20o with respect to the first. What are the

    asked by Robin
  117. Harriet Tubman Charter School Bronx NY10456

    Which needs regrouping to add? A. 47+3 B. 32+7 C. 15+4 D. 11+8

    asked by Mateen Olowo
  118. Circuit and electronics

    Here we analyze the time response of the circuit in Figure 3 which contains capacitive and resistive elements and a voltage source, VS. The voltage source is switched between two nodes in the circuit, and we observe the voltage response across C1. All

    asked by Anonymous
  119. physics/science

    If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

    asked by CC
  120. math

    $8000 is shared between 3 schools in the ratio of 2:3:5, how much will each school get?

    asked by Derek
  121. physics

    Buffy is rolling along in her 12.7 kg wagon at 3.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.2 m/s relative to the ground. This causes her wagon to go speeding forward at 9.51 m/s relative to the

    asked by dean
  122. English

    1. Should I use a question mark or a period? I can't go today so would it work tomorrow( ) 2. Is this correct? I did WELL on the test. NOT I did GOOD on the test. WELL=ADVERB OR ADJECTIVE GOOD=ADJECTIVE

    asked by Anonymous
  123. math

    the seismic waves of a magnitude 6 earthquake are 10 squared times as great as a magnitude 4 earthquake. The seismic waves of a magnitude 4 earthquake are 10 times as great as a magnitude 3 earthquake. How many times as great are the seismic waves of a

    asked by nicey
  124. Pre Algebra

    Hi, does anybody know what a quadrilateral in which opposite sides are congruent and parallel is? It's on a crossword puzzle on my math homework and is thirteen letters long and from the beginning the seventh letter is an E. Thanks so much to anyone who

    asked by Halle
  125. Chemistry

    iron has three main naturally occuring isotopes which can be investigated using a mass spectrometer. The first stage in the operation of the mass spectrometer is vaporization. The iron is then oxidized. Explain why the iron is oxidized. Explain why a very

    asked by Anonymous
  126. physics

    A person riding in the back of a pickup truck traveling at 60km/h on a straight, level road throws a ball with a speed of 10km/h relative to the truck in the direction of the truck's motion.What is the velocity of the ball relative to a stationary observer

    asked by beti
  127. physics

    If the vertical initial speed of the ball is 4.0m/s as the cannon moves horizontally at a speed of 0.70m/s , how far from the launch point does the ball fall back into the cannon? What would happen if the cannon were accelerating?

    asked by beti
  128. algebra & trigonometry

    A patient is not allowed to have more than 300 milligrams of cholesterol per day from a diet of eggs and meat. Each egg provides 150 milligrams of cholesterol. Each ounce of meat provides 100 milligrams of cholesterol. Write an inequality that describes

    asked by daniel
  129. algebra & trigonometry

    A school wants to purchase some round tables and some rectangular tables. The costs of one round table and one rectangular table are $20 and $25, respectively. The school wants to spend at most $1,000. Represent this problem for the purchase of x round

    asked by daniel
  130. Chem

    How many grams of CS2 can be prepared by heating 11.0 moles of S2 with excess carbon in 5.20 L reaction vessel held at 900 kelvin until equilibrium is attained?

    asked by Mer
  131. history

    What are three impacts of sit-ins?

    asked by Anonymous
  132. Strayer

    Choose two dimensions, describe them, and explain the relationship between your chosen dimensions. Provide at least two examples to support your explanation.

    asked by Annette
  133. Algebra

    Find all x-values such that f(x)=-4 x=__? What is the range? a)y|-oo

    asked by Student5
  134. Research and Statistics

    Explain how to accept and reject the null? How to identify the null and alternative hypothesis for t-tests in both statistical and experimental hypothesis?

    asked by Tiffany
  135. finance

    the target capital structure for QM industries is 45% common stock, 5% preferred stock and 50% debt. If the cost of common equity for the firm is 18.9%, the cost of preferred stock is 10.7% and the before tax cost of debt is 7.7% and the firm's tax rate is

    asked by rebecca
  136. physics

    What is the maximum amplitude of the resultant waves at the position of 2 . 7 m along the x -axis?

    asked by Anonymous
  137. Math

    Lou and Jan each ate 1/4 of an apple. Is there more than , less than , or exactly 1/2 of the apple left ? Explain. I don't know

    asked by Nawaf
  138. Math

    A rocket engine, 2.39 cross 10−5watts/cm2

    asked by Anonymous
  139. government

    Congress represents the larger public interest by (Points : 1)

    asked by Andy
  140. chemistry

    empirical formula of a barium hydroxide hydrate if a sample consists of 3.70 g of barium hydroxide and 2.64 g water.

    asked by Farrukh Khawaja
  141. Algebra 2

    an equilateral triangle has an inscribed circle with a radius of sqrt b+27 ft. if the area of the triangle is 48*sqrt b+6 feet squared. what are the two possible value of perimeter for this triangle?

    asked by Sujay
  142. Physics

    A ball thrown straight up at ground level passes a height of 115.7 m in 5.6 s. The acceleration of gravity is 9.8 m/s^2. What was its initial speed? Answer in units of m/s.

    asked by Fabricus
  143. Algebra

    The graph shows data from a recent satellite internet connection. The cost was 90 cents at 10 minutes, and 180 at 20 minutes. The connection service billed at a rate of how many cents per minute?

    asked by Student5
  144. algebra 1 help please ASAP

    Divide and simplify. 1. 2y^2 - 7y + 3/2y^2 + 3y - 2 divided by 6y^2 - 5y + 1/3y^2 + 5y -2 2. x^2 + 13x + 12/x + 2 divided by (x + 1) Please explain! Thanks!

    asked by Sadie
  145. math

    Richard is flying a kite at an angle elevation of 52 degrees. he is 5 ft tall. If richard is standing 100 ft from the point on the ground directly below the kite, compute the length of the kite string.

    asked by tor
  146. math

    20 tickets for 960 what is price of each ticket

    asked by michaela
  147. algebra & trigonometry

    A person wants to purchase two types of items, A and B, from a shop. She has $200 to spend, and she has to purchase at least 10 items. If the price of one unit of each A and B is $10 and $30, respectively, represent this problem graphically. Thanks

    asked by daniel
  148. algebra

    the current in an electrical conductor varies inversely as the resistance of the conductor. If the current is 12 ampere when the resistance is 240 ohms, what is the current when the resistance is 540 ohms

    asked by stacy
  149. algebra & trigonometry

    Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase.

    asked by daniel
  150. algebra

    seventeen greater than a number is 151 find the number the number is

    asked by patty
  151. Math

    A bag of buttons contains 3 red, 4 orange, 7 green and 10 blue battens. How many orange buttons should be added so that makes up 1/4 of the total? (Remember, if you add more orange buttons, your total buttons will also increase.)

    asked by Anonymous
  152. Finance

    Steve's ski shop has a net income of $389,000 with total sales of $2.5 million. Currently, the shop has debt of $500,000, equity of $800,000; receivables are 1.5 percent of sale, and Average total assets of $2,000,000. What is the Return on Equity? (Use

    asked by Andrew
  153. algebra

    x^3+4a+5a^2x^6 ascending order

    asked by will
  154. math

    Solve the set of linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 sove for a

    asked by kay
  155. java programing

    Write a program to determine maximum number among three non-equal numbers

    asked by valin
  156. Calc

    Consider the following: f(x)= the intergral of ((3-xe^x)/x )dx If the integration constant, C , is zero, then the value of f (1) is ????

    asked by Rebekah
  157. English

    How can I direct a key scene in Macbeth?

    asked by Tommy
  158. AP Chemistry- Equilibrium

    If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.

    asked by Danielle
  159. Alg 2

    check for extraneous solutions. 0, 7^4 2^4, inside the equation x^5/6 = 9x^7/12 - 14x^1/3

    asked by luciano
  160. Math

    17x-5-12x

    asked by Anonymous
  161. Alg 2

    sixthroot x^5 = 9 * twelfthroot x^7 - 14*thirdroot x

    asked by luciano
  162. Algebra 1

    A television is on sale for $300. If the sale price is 30% less than the regular price, what is the regular price?

    asked by Jynessa
  163. ENG1511

    How to write an argument essay.

    asked by Malibongwe
  164. economics business studies maths literacy

    which carrer can i choose

    asked by mashabela oupa
  165. Data apps and healthcare statistics

    what are the categories of information systems, examples of each and their roles in the healthcare delivery

    asked by amanda
  166. chemistry

    where can I use Group I and II anions in the field of medicine especially as a medtech student?

    asked by el
  167. Eng1511

    Paraphrase the sentence,"To cut a long story short one day idecided to be a man

    asked by Costance
  168. SCI207

    Net- zero refers to a building or installation that produces less energy less than consumes, considered to be energy reliant. True or false

    asked by Christy
  169. English art

    Please, critique this critique: Very dramatic interactions in a world novel to me, with canine preening for competitive exhibition, following the emotions of the lead characters is exciting. This is no "Dog story", and Lassie wouldn't be noticed in the

    asked by Albert
  170. physic

    Pere walked 4km east and 6km south.find the resultant displacement

    asked by Anonymous
  171. physic

    Pere walked 4km east and 6km south.find the resultant displacement

    asked by oye
  172. physic

    Pere walked 4km east and 6km south.find the resultant displacement

    asked by oye
  173. Physics

    A plane flies 407 km east from city A to city B in 44.0 min and then 871 km south from city B to city C in 1.90 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d)

    asked by Robin
  174. Physics

    A train at a constant 41.0 km/h moves east for 28 min, then in a direction 53.0° east of due north for 15.0 min, and then west for 64.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of

    asked by Robin
  175. math

    The only way to get to Ship Island is to take the ferry which is free for babies (2 and under), $17 for children (3-10 years old), $25 for seniors (62 and older), and $27 for everyone else. Debbie paid $115 for 6 people in her family to go to the island

    asked by John
  176. english

    need a help on writing a poster .

    asked by goodman
  177. Maths

    Please help me to understand transposing equations. In this example I need to find y x^2=y^2-r^2/y^2 Thank you for your help

    asked by Melody
  178. Is there a trick to dividing numbers ending in 0

    Is there a trick to dividing numbers ending in 0, like 204/1700?

    asked by Anonymous
  179. Chemistry

    A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg

    asked by Anonymous
  180. Chemistry

    A sample of argon has a pressure of 1.021 atm at a temperature of 89.4 degC. Assuming that the volume is constant, at what temperature will the gas have a pressure of 1016.56 mmHg

    asked by Anonymous
  181. physics

    You have a coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of -0.25. The other end of this coil is wrapped around a core with 15 turns. How many turns must a second coil wrapped around

    asked by Anonymous
  182. synonyms

    What is another word for playing the victim?

    asked by /////keysha////
  183. Math Help

    Please help me solve these two problems and check my answer :) 1. 3x-5+x+2 My answer- X= 17/3 2. 5/6x+1/4= -9/4 my answer- X= -2

    asked by Unknown
  184. math

    If an IV drop has 15 parts per 1,000 ml, how many parts would there be in 430 ml?

    asked by Anonymous
  185. chemistry

    50.0ml of an aqueous solution of 2.50M H3PO4 are mixed with 75.0 ml of an aqueous solution of 4.00 M Ca(OH)2. The resulting precipitate is washed and isolated using filtration. What mass of Ca3(PO4)2 is obtained?

    asked by tricia
  186. algebra & trigonometry

    Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase. Thanks

    asked by daniel
  187. algebra & trigonometry

    At a grocery store, the number of customers arriving per hour is shown by the function f(x) = 2x + 1. Find the number of customers that arrived in the 6th hour. Thanks

    asked by daniel
  188. algebra & trigonometry

    The profit of an organization is calculated by the function P(x) = x2 – 4000x + 7800000, where x is the number of units sold. If the net profit is 3800000, find the number of items sold. Thanks

    asked by daniel
  189. Math :-)

    Explain why knowing the height is needed when finding the perimeter of a right triangle.

    asked by anon
  190. physics

    f the vertical initial speed of the ball is 4.0m/s as the cannon moves horizontally at a speed of 0.70m/s , how far from the launch point does the ball fall back into the cannon? What would happen if the cannon were accelerating?

    asked by beti
  191. math

    differnce btween eight times a number twice the number is 18

    asked by jen
  192. math

    lemon juice is 10 squared times as acidic as tomato juice . Tomato juice is 10 cubed times as acidic as egg white. How many times as acidic is lemon juice as egg whites? write as a monomial. how do I solve this

    asked by nicey
  193. ball state

    Write the equation of the line passing through points (3, -2) and (6, 4).

    asked by Anonymous
  194. math

    The profit in dollars in producing x- items of some commodity is given by the equation P = - 40 x^2 + 1000 x - 5250 . How many items should be produced to maximize the profit? What is the maximum profit?

    asked by Lucy
  195. algebra & trigonometry

    The sum of three whole numbers is 7. The second number is 1 more than the twice of the third number. The sum of first and third number is 3 less than the second number. Find all the three numbers. Thanks

    asked by daniel
  196. algebra & trigonometry

    The sum of three whole numbers is 7. The second number is 1 more than the twice of the third number. The sum of first and third number is 3 less than the second number. Find all the three numbers. Thanks

    asked by daniel
  197. MATH HELP!!!!!!!!

    | 3 2 7 | x1 | | 46 | | -2 1 4 | x2 | = | 12 | | 6 -5 8 | x3 | | 60 | (b). Solve the system using the inverse of the coefficient matrix. (x1, x2, x3) = (________)

    asked by Dee
  198. English

    Can you check these? Neither the tourists nor their guide has/have time to photograph the gazelle? I think has because guide is singular. Neither my spaniel nor my neighbor's terriers do/ does tricks. I think do because terriers is plural.

    asked by Kelly
  199. PreCalc

    stacey is standing 5 miles west of the control tower at an airport. A plane took off traveling directly north of the control tower at a rate of 180 mph along the ground at a constant angle of 15 degrees. A)after 12 minutes, what is the angel between Stacey

    asked by Maddy