Questions Asked on
March 14, 2014

  1. Calculus

    Find four other forms of the point (4, 105°) Two of the four must include a negative r value.

    asked by Alexis
  2. pragati

    in the given figure ABCD is a trapezium in which AD parallel to BC. Angle ABC= 90degree. AD=16cm, AC=41cm and BC=40cm.find the area of the trapezium.

    asked by harsh
  3. Physics

    A 295kg box is pulled at a constant speed by the little engine. The box moves a distance of 2.8 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?)

    asked by Anonymous
  4. p

    Stan the strongman lifts a 524 kg dumbbell from the floor to 1.69 meters above the floor at a constant velocity. How much energy does it take Stan to lift the dumbbell?

    asked by Anonymous
  5. math

    Three boys are sharing a cake. Joey ate 2/5 of the cake, Billy ate 1/3 of it, and Matt ate the remaining piece. What is the ratio of Joey's piece to Billy's piece to Matt's piece?

    asked by Dana
  6. Writing Skills Writing Assignment

    I am trying to complete a 750 to 1000 word essay but I completely have no clue what to write about and my writing skills is a bit lacking. It needs to be about a personal experience. I have more info if needed.This is the final paper result. Your final

    asked by Jen
  7. Algebra

    At a concession stand three hot and 4 hamburgers cost 13.50; 4 hot dogs and 3 numbers cost 12.75. Find the cost one hot dog and the cost of one hamburger

    asked by Shauna
  8. Algebra

    1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise

    asked by Math Help? Please
  9. Math

    For what value of a, would the system have an infinite number of solutions? 2x-y=5 8x-47=2a A) 2 B) 4 C)5 D)10 E)20

    asked by HELP PLEASE
  10. Chemistry

    How many grams of I2 are present in a solution if 39.85mL of 0.160M Na2S2O3 solution is needed to titrate the I2 Solution

    asked by Jackie
  11. physics

    Croquet ball A moving at 8.0m/s makes a head on collision with ball B of equal mass and initially at rest. Immediately after the collision ball B moves forward at 7.1m/s . What fraction of the initial kinetic energy is lost in the collision?

    asked by Ina
  12. statistics

    Which two scales of measurement always require nonparametric procedures and why?

    asked by Anonymous
  13. math

    Compute Mike's estimated tax payment for the fourth quarter. He is self-employed and he expects to earn $20,640 this year. His estimated income tax rate is 18%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare

    asked by Anonymous
  14. math

    How much combined tax should be withheld from the paycheck of a single employee earning $3,185 per month and claiming zero withholding allowances?

    asked by Anonymous
  15. math

    Thomas Rendell's company pays him a straight 6% commission with a $1,350 drawing account each month. If his sales last month totaled $152,480, how much commission is owed to Thomas?

    asked by Anonymous
  16. math

    Solve the following problem using 6.2%, up to $106,800, for social security tax and 1.45%, no wage limit, for Medicare tax. Kristy Dunaway has biweekly gross earnings of $1,750. What are her total social security and Medicare tax withholdings for a whole

    asked by Anonymous
  17. math

    Jerry King is a server in a restaurant that pays a salary of $22 per day. He also averages tips of 18% of his total gross food orders. Last week he worked 6 days and had total food orders of $2,766.50. What was his total gross pay for the week?

    asked by Anonymous
  18. math

    Solve for the base, rounding answer to hundredths if necessary: 76 is .2% of ______.

    asked by Anonymous
  19. math

    Ace Formalwear buys tuxedos from a supplier and has an invoice amount of $27,700. The terms of the sale are 3/20, n/30. If Ace sends a partial payment of $7,400 on the discount date, what is the net amount still due?

    asked by Anonymous
  20. math

    On August 18, Sullivan Company received an invoice in the amount of $6,700, having terms of sale of 4/15 EOM. What is the discount date?

    asked by Anonymous
  21. Physic A Level

    A lift cable which is 50m long ,is made from high tensile steel of Young Modulus 2.0x 10^11 Pa. the cable is made from 100 wires each of radius 2.0mm . Calculate the extra extension in the cable when 10 passengers pile into the lift ,the total mass of the

    asked by Laila
  22. physics

    An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2

    asked by A
  23. physics

    What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) g(R−h)R g(R−h)2R2 2 The instrument used for experimental determination of the value of the universal gravitational

    asked by A
  24. physics

    A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 24.2kg and the mass of the boat is 33.2kg . Calculate the velocity of the boat immediately after, assuming it was initially at rest.

    asked by Edward
  25. Math

    A firm is evaluating two machines. The first costs $250,000 and will require annual maintenance of $30,000 per year for 10 years. At the end of 10 years, the salvage value will be $75,000. The second machine costs $400,000 and will require $225,000 at the

    asked by MathHelp
  26. Physics

    A freight train has a mass of 4.78 * 10^7 kg. the locomotive provides a force of 1.3 * 10^6 N and the brakes provide a force of -3.2 * 10^3 N. 1. How long will it take for the train to accelerate to it's maximum speed of 15 m/s? 2. The train accidentally

    asked by Michelle
  27. Physics

    A traffic light is hanging from two cables tilted at 37 and 42 degrees. If it has a mass of 2.3 kg find the tension in each cable.

    asked by Michelle
  28. English

    I need to make this into two paragraphs and make it a little longer. I am drawing a blank. Can someone please help me. My study habits consist of reading aloud, note taking and last minute cramming. The reading aloud and note taking have always worked well

    asked by Michelle
  29. math

    Jungle Jim owes three debts: $500 due in one year plus interest at 6% compounded semi-annually, $2000 due in two years, $1000 due in three years plus interest at 5% compounded monthly. He wishes to discharge these debts by paying $500 now and two equal but

    asked by MathHelp
  30. quantitative techniques

    solve this using gaussian elimination x+5y=7 -x-7y=-5

    asked by shumirai
  31. chemistry

    A radioactive sample contains 2.45 g of an isotope with a half-life of 3.8 days. How much of the isotope in grams will remain after 11.4 days?

    asked by Jacques
  32. Physics

    A rope is wound round a fixed cylinder of radius r so as to make n complete turns . Show that if one end of the rope is held by a force f, a force f e^2(pi)nu must be applied to the other end to produce slipping,where u is the coeff. of friction between

    asked by Ayat
  33. Physics

    A stream of water flows through a small hole at depth h = 10 cm in a tank holding water to height H =40 cm. At what distance x (in cm) does the stream strike the floor? (Neglect air resistance).

    asked by yana
  34. science

    What happened to the proportions of the two phenotypes as the F1 generation grew from 10 to 100 offspring? Why?

    asked by biology123
  35. science

    If Mendel had only looked at a single cross that produced 10 offspring to determine the pattern of inheritance of seed shape in pea plants, what might he have inferred?

    asked by cell123
  36. science

    How can two parents with only one round allele between them (1 out of 4 alleles) produce an F1 generation in which 50% of individuals have round seeds? What appears to be the inheritance pattern for seed shape?

    asked by parent123
  37. please check(Social studies)

    1.A 2.A 3.B 4.D 5.C 1. Which circumstance had the most direct impact on european colonization of caribbean south america A. The slave trade in africa B. the fur trade in europe C. piracy in the caribbean sea D. rumors of gold in EL Dorado 2. How did global

    asked by bonn
  38. Physics

    Stan the strongman lifts a 524 kg dumbbell from the floor to 1.69 meters above the floor at a constant velocity. How much energy does it take Stan to lift the dumbbell?

    asked by please help
  39. physics-impulse

    A tennis ball of mass m = 0.068kg and speed v = 21m/s strikes a wall at a 45∘ angle and rebounds with the same speed at 45 What is the magnitude of the impulse given to the ball?

    asked by Edward
  40. Physics

    A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?

    asked by Anonymous
  41. physics

    A 15.7 kg block is at rest on a ramp, whose angle is 12.1 degrees from the horizontal. How much Normal Force is acting on the block?

    asked by Anonymous
  42. math

    select the values of ^xthat are the solutions to inequality 0>x^2+5x-2

    asked by EMILYS MOM
  43. math

    slove for ^x in the equation X^2 -3x-18=0

    asked by EMILYS MOM
  44. math

    select the approximate values of x that are solutions to f(x)=0, f(x)=-8x^2+2x+4

    asked by WINSTON
  45. math

    select the approximate values of x that are solutions to f(x)=0 where f(x)-5x^2+8+5

    asked by WINSTON
  46. chemistry

    Calculate the molarity if a Ba(OH)2 solution if a 37.25ml portion of this solution is neutralized by 45.00mL of 1.500M HCl. You will need the balanced reaction

    asked by Anonymous
  47. Mathematics

    Old MacDonald has to pack 60 chickens into 32 cages. If each cage can hold at most 3 chickens, what is the minimum number of cages that will have at least 2 chickens?

    asked by Hari
  48. Economics

    The South African government is not providing enough welfare of subsidies to the poor and underpriviledged. -What are welfare payments or consumer subsidies? -What is the South African govornment providing and to whom? -What are the costs and consequences

    asked by Sphesihle Mthethwa
  49. chemistry

    In standardizing a potassium hydroxide solution, a student finds that 32.60mL of the base solution is needed to titrate 0.5045 grams of KHP to a phenolphthalein end point. In another titration, 26.63mL of this same base solution is needed to titrate

    asked by Anonymous
  50. algebra

    Graph the set of data {(1,7),(-2,1),(3,13),(-4,-3),(0,5)} Answers are Y=0,9x+8.6 Y=2/5x=-2 Y 5/2x+5 Y=5 Thanks

    asked by snow
  51. social studies(updated answers)

    2.C 3.D 4.A 2. How did global trade most contribute to the colonization of south america? A. competition over shipping lanes B. need for raw materials to make goods C. desire for new trading partners D. resistance to government control of commerce 3. what

    asked by bonn
  52. Grade 10 English

    We need to read the story The Stone Carvers I need help with finding important quote s in chapter 1 to 2

    asked by Anonymous
  53. I need help (Physics)

    A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?

    asked by Help please
  54. History 12

    What does lenin have to do with Tsarism, World War 1, March revolution and the provisional government, November Revolution, the civil war, War Communism, national Economic Policy, Trotsky, Stalin, and the Comintern?

    asked by Crystal
  55. Math

    The data in the table are linear. Use the table to find the slope. x 2 4 6 8 y 1 -2 -5 -8 A. 3/2 B. -3/2 C. -2/3 D. 2/3

    asked by Anonymous
  56. physics

    A chemist is working with a 4.50 mol sample of an ideal gas. The internal energy of the sample is known to be 14,900 J. What is the average kinetic energy of each gas molecule?

    asked by Anonymous
  57. human bio please help

    Skeletal muscles contract when their (A)__________ shorten, using the energy source ATP. A rise in the concentration of (B)__________ ions causes muscle contraction.

    asked by Ann
  58. Physics

    A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that

    asked by Anonymous
  59. chemistry

    Five liters of air at -50.0°C are warmed to 100.0°C. What is the new volume if the pressure remains constant?

    asked by Anonymous
  60. Physics

    A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that

    asked by Anonymous1
  61. Algebra

    1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an

    asked by Math Help? Please
  62. Algebra

    1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise

    asked by Math Help? Please
  63. phys

    A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is

    asked by q.
  64. Biology

    What is the basic unit of information in a DNA molecule? In an RNA molecule? In a polypeptide?

    asked by Anonymous
  65. personal finance

    Chloe has a $2,500 credit limit on her credit card and has charged $1,295.19 to her account. There is a 1.5% finance charge on the $1,295.19. How much must Chloe pay to clear her account?

    asked by maria
  66. Physics

    A car starts from rest and moves with uniform acceleration of 0.3 meter per second. After 30 second, find the velocity of the car and distance covered?

    asked by M.Tariq
  67. Chemistry

    A student has 600.0 mL of a 0.30M solution of HNO3. How much water must she add in order to make it a 0.15 M solution? Be careful how this question is answered.

    asked by Katie
  68. social studies(updated answers)

    2.B 3.C 2. How did global trade most contribute to the colonization of south america? A. competition over shipping lanes B. need for raw materials to make goods C. desire for new trading partners D. resistance to government control of commerce 3. what

    asked by bonn
  69. algebra

    A 5mile cab ride costs$7.20 a 9 mile cab ride costs $11.60 find a linear equation that models a relationship between cost c and distance d? Answers are C =1.44 d +4.40 C=1.10 c +4.40 C=1.29 d+1.70 C=1.10 d +1.70 Thanks

    asked by snow
  70. Social studies

    Four major candidates ran in the 1824 election, all under the "Democratic-Republican" name. One of the candidates, Andrew Jackson, was already famous. In the 1780s, he earned the right to practice law and served in various offices of the state government,

    asked by Jessie
  71. English

    The burning of trees adds carbon dioxide to the air OR the burning of trees add carbon dioxide to the air?

    asked by Anonymous
  72. Physics

    A skater with an initial speed of 5.90 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.125. Find the

    asked by Elle
  73. Precalculus

    1. Here is the frequency table for this distribution (the frequency histogram is not shown): Since I cannot make a table on this forum,the format will be like this: Time(minutes)and Number of telephone calls. 0

    asked by Anonymous
  74. Chemistry

    how many grams of bromine will be present in a sample that molar mass of 70.0 g/mol and occupies a 2.00L container at 117 kPa and 35.1C

    asked by Bernardo
  75. Chemistry

    Uranium 235 problem that exits

    asked by HIna
  76. AP Biology

    The one-pod condition (P) is dominant to the three pod condition (p). Normal leaf (L) is dominant to wrinkled leaf(l). Determine the genotypes for the two parents for all possible matings producing the following: 150 one pod normal, 147 one pod wrinkled,

    asked by Luis
  77. history

    "Such is the Old Town of Manchester, and on re-reading my description, I am forced to admit that instead of being exaggerated, it is far from black enough to convey a true impression of the filth, ruin, and uninhabitableness, the defiance of all

    asked by maya
  78. Chemistry

    How much water can be produced from the complete reaction of 3.64 L of oxygen gas, at STP, with hydrogen gas? Answer in units of g

    asked by Linda
  79. urgent (physics)

    A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that

    asked by help
  80. Probability

    Question #1 50 students total. 12 students travelled by car only 7 students travelled by bus only 5 students travelled by car and walked,but did not use a bus 10 students travelled by bus and walked,but did not use a car 3 students used all three forms of

    asked by Anonymous
  81. Absorption spectra of pigments

    On the graph light absorption in % vs wavelength, how come the color of chlorophyll is green? Since this is an absorption spectra, isn't it supposed to absorb blue and red and not green? Rather, it reflects green??? How would the graph be different if it

    asked by Anonymous
  82. Chem

    The density of ethanoic anhydride is 1.092 g/mL. Use this value, and the amount that you used in the laboratory to show that ethanoic anhydride is in excess for your preparation of ASA?, 2.5ml of ethanoic anhydride was used.

    asked by Dan
  83. Chemistry

    Determine the rate constant for the following second-order reaction: A=C+2D given that the initial concentration of A is .3 M and that the concentration of C increase to .01 M in 200 seconds. Express the result in terms of the rate law for the loss of A.

    asked by Anonymous
  84. Physics

    Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring X and its spring constant K.

    asked by Tim
  85. Chemistry

    In a bomb calorimeter, a 6.50 g sample of octane (C8H18) is combusted. The combustion enthalpy for octane is -5.45 MJ per mol C8H18. The temperature change of the calorimeter is 16.5 oC. What is the heat capacity of the calorimeter?

    asked by Mary
  86. Chemistry

    When the rate of the reaction 2NO+O2=2NO2 was studied, the rate was found to double when the O2 concentration alone was doubled but to quadruple when the NO concentration alone was doubled. Which of the following mechanisms accounts for these observations?

    asked by Anonymous
  87. algebra

    Your research the average cost of whole milk for several years to look trends the table show your data what is the equation for a line that best fits how much would you expect to pay for a gallon of milk in the year 2023? Year 1998, 2000, 2002, 2004,

    asked by snow
  88. Physics

    The acceleration of a particle moving only on a horizontal xy plane is given by a=5ti+6tj, where a is in meters per second-squared and t is in seconds. At t=0, the position vector r=(19.0m)i+(39.0m)j locates the particle, which then has the velocity vector

    asked by Stacey
  89. English 3

    When Thomas Paine writes about reconciliation he is referring to

    asked by Anonymous
  90. Physics

    A particle leaves the origin with an initial velocity v=(3.68i) m/s and a constant acceleration a=(-3.33i-3.72j)m/s^2. When the particle reaches its maximum x coordinate, what are (a) its velocity, (b) its position vector?

    asked by Stacey
  91. Calculus Help and Check

    Find dy/dx by implicit differentiation. x^5(x + y) = y^2(9x − y) this is what i've got so far but I don't think it is the right answer. y'= 9y^2-6x^5-5x^3y/x^5+9y^2-18xy

    asked by Tanya
  92. Business

    What does stagnant and inflation means

    asked by Darius
  93. Phi

    The social contract approach to political theory

    asked by Dale
  94. English proposal

    I am going to post my proposal here so can someone please edit it? When I post it can you quickly copy and paste into a document and delete my post from here so it won't be public?

    asked by Mohammad
  95. Business

    Stagflation refers to an economy that is what, but which has what?

    asked by Darius
  96. Business

    Economists have created terms to describe what? What is called depression? The largest depression in the twentieth century was the what? and how long did it last? In 1933 being the worst year how many workers were out of work?

    asked by Darius
  97. algebra

    Want to learn how to do a scatter plot it is about home in Texas average temperature from January to August and electricity bills from January to August Thanks

    asked by snow
  98. statistic

    You draw one card from a shuffled standard deck or cards (cards are in four suits-red diamonds, red heart, black clubs and black spades-and are numbered 2,3,4,5,6,7,8,9,10, J,O,K,A). A.What is the probability of drawing a red card B.What is the probability

    asked by Helen
  99. Statistic

    In a survey of students at a local high school, 30% of the students said they liked tater tots and 15% of the students said they like French fries. If every one of the students who said they like French fries also said they like tater tots, what proportion

    asked by Helen
  100. math

    A G.P has 6 terms. If the 3rd and 4th term are 28 and -56 respectively find common ratio, first term and the sum of the G.P.

    asked by princewill favour
  101. Math

    In the Math Virtually Everywhere project you completed for this module, you learned all about cell phone plans. The best cell phone plan for a customer can vary based on how much they plan to talk. The plan that is the best deal for one customer may not be

    asked by Nick
  102. Happy Pi Day

    http://www.cnn.com/2014/03/14/tech/innovation/pi-day-math-celebrations/

    asked by Ms. Sue
  103. Science on dissolving

    Some medicines are more effective if they dissolve slowly. How could you design a pill that would take longer to dissolve?

    asked by Harmony Ann
  104. chem

    at a certain temperature, .700 mol of SO3 is place in a 4.50-L container. 2SO3(g)--2SO2(g)+O2(g) At equilibrium, .140 mol of O2 is present. Calculate Kc

    asked by Jill
  105. Chemistry

    Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron (|||) hydroxide (Fe(OH)3) d.) copper (Cu)

    asked by Kelsi
  106. French Pronunciation

    Is été pronounced like eh-ti or like eh-tay?

    asked by Anonymous
  107. Calculus

    Find equations of both the tangent lines to the ellipse x^2 + 4y^2 = 36 that pass through the point (12, 3). smaller slope y= larger slope y=

    asked by Tim
  108. math

    i put 4000.00 in savings. at end of 3 years the account earned 960.00 in simple interest at what simple interest rate did the account grow? please show me the work.

    asked by mark
  109. Math

    Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4

    asked by jacob
  110. Math, Please Help!

    Ned divided a given number by 3 and then added 2. If he should have multiplied the number by 3 and then subtracted 2, which of the following two steps can he do next to get the correct answer? Subtract 4 and then multiply by 9. Subtract 12 and then

    asked by Toni
  111. Chemistry, please help!!!

    I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question? Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron (|||)

    asked by Kelsi
  112. French Pronunciation

    Are danse, danses, and dansent pronounced the same way?

    asked by Anonymous
  113. technology

    Need help on the question below. I have read all about all 3 laws but still don't understand if this would be 1st or 2nd law. "A ball is rolling in a straight line on a hardwood floor. A cat hits it from the right, so the ball rolls left. Which Law of

    asked by Brandi
  114. Probability

    Question #1 50 students total. 12 students travelled by car only 7 students travelled by bus only 5 students travelled by car and walked,but did not use a bus 10 students travelled by bus and walked,but did not use a car 3 students used all three forms of

    asked by Anonymous
  115. Physics

    A mountain climber dangles his water bottle and feels the bottle makes an angle of 25 degrees with respect to the vertical line. If his acceleration takes 18 seconds, calculate the speed of the climber.

    asked by Bert
  116. exceptionall children

    transactional relationship exist in families because .my answer is b. children and adults influence each others behavior

    asked by sabrina
  117. THIS IS FOR MATH AND SCIENCE TUTORS

    HAPPY PI DAY! A mathematician, a physicist, and an engineer are all given identicalrubber balls and told to find the volume. They are given anything theywant to measure it, and have all the time they need. The mathematician pulls out a measuring tape and

    asked by Anonymous
  118. Physics

    Two cars are parked on a street. A third car hits the back of the second car and causes all of the cars to move. (Ignore the distance between the cars). Calculate: (a)The acceleration of the whole system; (b)the net force on each car; (c)the contact force

    asked by Bert
  119. English

    What is the difference between "brightest people" and "brightest of people?"

    asked by Anonymous
  120. chemistry 101

    How many grams of bromine are in 1.57 grams of phosphorus tribromide?

    asked by steve
  121. College History

    How do I find the answer to the question below? Salonica is today a provincial city in a small country. For centuries it was the second city of a major empire. Little or nothing is now left of that heritage. What is it about the past of this city, however,

    asked by Amy
  122. algebra

    9x+y=11

    asked by robert
  123. research

    How is the Spivak and Sharp (2008) study a replication of the prior study by Bales and colleagues (2005)?

    asked by todd
  124. Science

    ____ bacteria carry out the conversion of gaseous nitrogen to a biologically useful form of nitrogen. My answer is "nitrogen-fixing" (This is fill in the blank)

    asked by Amy
  125. Math

    At an office, the manager earns 40% more than a first year employee. The employee earns what fraction of the manager earnings? (a) 1/4 (b) 3/4 (c) 5/7 (d) 4/5

    asked by Pat
  126. Money

    Sarah and Billy are waiters at Jill's Grill. During the night shift, Sarah makes $86.00 in tips, while Billy makes $102.00. What percentage of Billy tips did Sarah make? (a) 82% (b) 84% (c) 86% (d) 88%

    asked by Pat
  127. physics

    A force of 15 N (delivered by a cue) acts on a billiard ball for 0.01 s. Find the magnitude of the a. acceleration of the ball b. final speed of the ball c. distance over which the cue was in contact with the ball

    asked by Swastika
  128. math

    There is a 5 to 4 ratio of women to men at the game. If there are 360 women , how many men are at the game (a) 256 (b) 275 (c) 288 (d) 305

    asked by Pat
  129. physics

    When rolling along the felt on the billiard table, the ball experiences a frictional force of 0.2 N. a. What is the deceleration of the ball on the felt? b. How far will the ball roll before stopping? c. Explain this in terms of Newtons first law of

    asked by Swastika
  130. physics

    A 10^4 kg train moving at 20m/s stops in a distance of 500m. Calculate the force applied by the train's braking system.

    asked by Swastika
  131. math

    Three pumps begin draining a 7500-gallon pool. At the same time, two pumps begin to drain a 4800-gallon pool. Assuming that all pumps drain at the same time., how many gallons are left in the larger pool when the smaller pool finished being drained? (a)

    asked by Pat
  132. physics

    A 60 kg of sprinter accelerates from rest at 2.5 m?s^2 East for 4s. What force is acting and what is the final speed?

    asked by Swastika
  133. physics

    A jet fighter with mass 5000 kg accelerates from 360 km/hr in 10b s. Compute the minimum thrust required by the jet's engines.

    asked by Swastika
  134. physics

    A five kg box is pulled along a frictionless surface by a string just capable of suspending a 15 kg mass at rest. What is the maximum acceleration that can be given to the box?

    asked by Swastika
  135. physics

    A 200 kg piano is suspended by a rope from a high building. (Assume the mass of the rope is zero). a. What is the weight of the piano? b. What is the tension of the rope? c. The piano is now hoisted up with an initial acceleration of 1 m/s. What is the

    asked by Swastika
  136. physics

    Describe the difference between the quantities, mass and weight. Give a description of two distinctly different ways in which object's weight can be altered.

    asked by Swastika
  137. physics

    Calculate the force needed to accelerate a 1 kg ball by 3 m/s: a. in space along way from the earth. b. on the ground in a direction horizontal to the ground. c. on the earth vertically upward.

    asked by Swastika
  138. physics

    An astronaut shoots you in space given that the bullet is weightless, could it injure you?

    asked by Swastika
  139. physics

    A 70 kg man stands on an accurate spring scale inside the elevator. Given that the lift can accelerate and decelerate at 2.2 m/s^2, Compute the man's maximum and minimum weight.

    asked by Swastika
  140. kinridg

    there are 120 skittle in a bag there are 15 skittle left. how many half-live have passed

    asked by rahel
  141. physics

    Two cars approach an ice-covered intersection. One car, of mass 1.26 103 kg, is initially traveling north at 10.6 m/s. The other car, of mass 1.66 103 kg, is initially traveling east at 10.6 m/s. The cars reach the intersection at the same instant,

    asked by Anonymous
  142. physics

    A missile of mass 1.20 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.05 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane?

    asked by Anonymous
  143. chem.

    A certain reaction has an activation energy of 66.58 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 289 K

    asked by Anonymous
  144. Chemistry

    I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question? Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron (|||)

    asked by Anonomous
  145. Science (Chemistry)

    . Complete all the following for the reaction (NH4)2S + Cd(NO3)2 --> CdS(s) + NH4NO3 1. Balance this equation 2. Write the ionic equation 3. Write the net ionic equation

    asked by Anonymous
  146. chem.

    the rate limiting step is unimolecular with A as the sole reactant. A+B-----C+D If A and B are both 0.200M, then the rate reaction is 0.0050M/s A. What is the rate of the reaction if A is doubled? B. starting with original concentrations what is the rate

    asked by Anonymous
  147. math

    A & B Antiques issued the following bonds: Date of issue and sale: April 1, 20-1 Principal amount: $430,000 Sale price of bonds: 100 Denomination of bonds: $1,000 Life of bonds: 10 years Stated rate: 8%, payable semiannually on September 30 and March 31

    asked by lol
  148. spanish

    Who forced napoleon bonaparte to abandon plans for an American empire ?

    asked by sketch
  149. Trigonometry

    How to simplify 4sin[pi/2 + x] ?

    asked by Anonymous