1. Physics

    A ball is thrown straight up from the ground with speed v_0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the first ball was thrown upward. There is no air resistance. Find the value of H in terms

    asked by Anonymous on May 28, 2010
  2. math 100

    Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 70 people. (You may need to use the standard normal distribution table. Round your answers to the nearest

    asked by ryan on November 9, 2018
  3. physics

    On a banked race track, the smallest circular path on which cars can move has a radius of 101 m, while the largest has a radius of 163 m, as the drawing illustrates. The height of the outer wall is 19.0 m. Find (a) the smallest and (b) the largest speed at

    asked by xavier on September 18, 2016
  4. Math

    A colony of bacteria increases according to the law of unihabited growth. a) If the number of bacteria doubles in 5 hours, find the function that gives the number of cells in the culture. I have the answer to this one. It is N=No e ln2/5 (t) b) If there

    asked by Hannah on November 20, 2010
  5. physics

    A uniform 8 m 1500 kg beam is hinged to a wall and supported by a thin cable attached 2 m from the free end of the beam as shown in the figure. The beam is supported at an angle of 30 degrees above the horizontal. a) free diagram b) find the tension in the

    asked by Anonymous on June 17, 2010
  6. physics

    A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L . The string makes an angle θ with the rod. The fundamental frequency of the standing waves in the portion of the string above the rod is f.

    asked by Anonymous123 on March 17, 2018
  7. Math

    In Saturday's 8 mile race Sarah's goal was to complete 1/2 of the run in 48 minutes. After that time had elapsed Sarah had run 2/3 of the total race. Which shoes how far ahead of Pace Sarah is? A.1/6 B.3/6 C.7/8 D.2/6 A? Before Chad shared his starburst

    asked by Jerald on November 9, 2012
  8. math 115

    1. sabrina has the following math quiz scores. 19, 24, 25, 17, 13, & 18. find her mean score, to the nearest tenth if necessary.= 13 is this correct? 2. eleven applications for a certain position had the following ages. 32, 33 ,25, 36, 48, 51, 28, 23, 54,

    asked by Lea on September 6, 2009
  9. Calculus Help

    Farmer Brown wants to fence in a rectangular plot in a large field, using a straight rock wall that is already there as the north boundary. The fencing for the east and west sides of the plot will cost $3 a yard, but she needs to use special fencing, which

    asked by Chris on April 24, 2014
  10. Calculus

    Find the minimum distance between the curves y=e^x and y=lnx. Hint: Use the fact that e^x and lnx are inverse relationships. I have no idea where to start. Thanks! calculus - Reiny, Monday, January 18, 2016 at 9:02pm to get you going: let P(a , e^a) and

    asked by Samuel for Reiny on January 19, 2016
  11. Ap Chemistry

    one problem the researchers faced was an uncertainty about whether the signals observed in certain mass spectrometry data were, in fact, due to lead isotopes. Explain why this was a problem. In other words, why wasn't information about the mass of the

    asked by Otice on September 27, 2017
  12. Human Geography (Religion)

    So I have to do a project on the Cultural Interaction in Religion. My religion is Sikhism. Here are the questions I'm supposed to answer in my presentation: How does the religion impact other aspects of culture? How does this religious faith influence the

    asked by Maddie on January 20, 2009
  13. physics

    For the next part, you will need to know that the position d of an object attached to a spring that oscillates with period T=1.0s is a sinusoidal function of time: d=kcos(2πt)d=kcos(2πt) for some constant k. Assume that the initial position of the object

    asked by k on March 30, 2016
  14. physics

    A binary star consists of two dense sphereaty masses of 10rest power 30 kg and 2 x 10rest power 30kg. Whose centres are 10rest power7km apart and which rotate togethe with angula velocity w about an axis which intersects a line joining their centres - show

    asked by ugochukwu on March 10, 2016
  15. Physics

    A 16 kg mass is attached to a cord that is wrapped around a wheel with a radius of 10.9cm. The acceleration of the mass down the frictionless incline is measured to be 1.4 m/s2.The angle of incline is 36 degrees. Assume the axle of the wheel to be

    asked by Caryn on March 26, 2010
  16. Calc 2

    Can you give me the step by step instructions on how to do this problem? I'm having difficulty understanding Riemann Sum. Let f(x) = 2/x a. Compute the Riemann sum for R4 using 4 subintervals and right endpoints for the function on the interval [1,5]. b.

    asked by Bae on May 2, 2014
  17. physics

    Would someone check my thinking please. A solid sphere (mass, r, and moment of inertia given) is rotating at a given angular speed. Friction is constantly applied at the 'equator' of the sphere, and brings it to rest in 3s. Find the force. I worked out the

    asked by charlie on June 15, 2009
  18. Geometry

    One can of pumpkin pie mix will make a pie of diameter 8 in. If two cans of pie mix are used to make a larger pie of the same thickness, find the diameter of that pie. Use sqrt 2 is equal to about 1.414

    asked by Emily on March 8, 2008
  19. math

    The speed of train A is 6 mph slower than the speed of train B. Train A travels 200 miles in the same time it takes train B to travel 230 miles. Find the speed of speed of each train.

    asked by Zipporah on April 18, 2016
  20. math

    The no of library books in a school increased by 20% after it bought new books in May , the number increased by another 20% after a book store donated 300 books in June - Find the no of books in library before it bought new books in May

    asked by muhammad Saleem on January 7, 2017
  21. Math

    Jane has three boxes she needs to ship. Box X weighs kg more than Box Y and Box Z weighs kg more than Box Y. She measured the total weight of all the boxes and it was found to be kg. Which equation can be used to find the weight, w of Box Y? A=3w-15 1/4=55

    asked by PLZ HALP on November 7, 2017
  22. MATH

    Suppose an object moves along the x-axis so that its position at time $t$ is $x=-t+\frac{t^3}{6}$. (a) Find the velocity, $v(t)=x(t)$, of the object. (b) What is $v(0)$? What does this say about the direction of motion of the object at time $t=0$? (c) When

    asked by Sara on October 20, 2016
  23. math

    The speed of train A is 6 mph slower than the speed of train B. Train A travels 200 miles in the same time it takes train B to travel 230 miles. Find the speed of speed of each train.

    asked by Zipporah on April 18, 2016
  24. Physics

    One closed pipe organ has a length of 2.5 m. The frequency of the note is 34.3 Hz. When a second pipe is played at the same time, a 1.7 Hz beat note is heard. By how much is the second pipe too long? Would you have to use the frequency of the second pipe

    asked by Einstein on December 6, 2007
  25. math graphs

    4. Which equation would you use to find out if the two lines in the graph are parallel? (1 point) LINE #1: point a: 1, 4 point b: -2, 1 LINE #2: point c: 3, 3 point d: -1, -1 a. 4 - 1/-2 - 1 = 3 - 1/3 - 1 b. 4 - 1/-2 - 1 = 3 - (-1)/3 - (-1) c. 4 - 1/1 -

    asked by Divergent Dauntless on May 5, 2014
  26. maths

    Driving to work alone. It is reported that 77% of workers aged 16 and over drive to work alone. Choose 8 workers at random. Find the probability that a) All drive to work alone b) More than one-half drive to work alone c) Exactly 3 drive to work alon

    asked by saima on January 12, 2015
  27. calculus

    I'm feeling pretty stupid right now because I can't remember how to do these. if f(x) = (2x-5)/(x^2-4), write an equation of the tangent line to f at point x=0. *How do I find the slope of the tangent line? and how do you put x=ln4 into a y= equation? Take

    asked by blondie07 on March 11, 2007
  28. algebra

    A 20-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 4 ft longer than the height that reaches on the side of the bridge. Find the Horizontal and vertical

    asked by sheba on July 26, 2011
  29. algebra

    A 10-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 2 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and

    asked by carol on May 1, 2011
  30. math

    A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. How many are not using any of the three? 35 said they drove alone. 35 rode in a carpool. 30 rode public transportation. 3 used both carpools

    asked by Ms Jackie on December 5, 2012
  31. maths

    An observer on top of a building 66 metres high,finds the angle of elevation to the top of a taller building to be 34 degrees.The angle of depression to the foot of the same building is 51 degrees.If the buildings are on the same ground level find the

    asked by Shane on March 13, 2013
  32. Math

    The cost of hiring a chainsaw is 10$ plus an amount that is proportional to the square of the number of hours for which the chainsaw is hired. If it costs $32.50 to hire the chainsaw for 3 hours, find to the nearest half hour, the length of time for which

    asked by Aana on March 15, 2018
  33. Math

    A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. How many are not using any of the three? 38 said they drove alone. 34 rode in a carpool. 33 rode public transportation. 9 used both carpools

    asked by Reggie on December 11, 2012
  34. Calculus 2

    A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not

    asked by Liz on June 22, 2013
  35. Math: Please help

    Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152 answer: 30th percentile = 113 90th percentile = 200 thank you

    asked by Cassie on March 20, 2014
  36. Statistics

    A coffee company wants to make sure that there coffee is being served at the right temperature. If it is too hot, the customers could burn themselves. If it is too cold, the customers will be unsatisfied. The company has determined that they want the

    asked by Rachel on March 15, 2012
  37. Physics

    In air, the distance traveled by a sound wave is 140 meters during 400 vibrations. If the frequency of the tuning fork is 500 Hz, find the velocity of sound in air. Here's what I did: Wavelength= 140/400=0.35 So, velocity= 500*0.35= 175 m/s Am I right?

    asked by Anonymous on October 1, 2015
  38. Math

    A math teacher wrote x^2+bx+c=0 on the board and asked students to find the two real roots. Alice miscopied one of the coefficients and found that 1 and 4 were the roots. Andy miscopied a different coefficient and found that -2 and 3 were the roots.

    asked by Devin on February 25, 2012
  39. physics pls help!

    1.) water is flowing through a horizontal pipe of varying crosection, the diameter is 12.0 cm at a pressure of 8.0x10^4 Pa. at section 2, the pipe has a diameter of 6.0 cm and the pressure is 6.0x10^4 Pa. find the speed of water through section 1 and 2

    asked by erjee on September 6, 2013
  40. physics help i still dont get it

    A picture of width 43.0 cm, weighing 52.0 N, hangs from a nail by means of flexible wire attached to the sides of the picture frame. The midpoint of the wire passes over the nail, which is 2.50 cm higher than the points where the wire is attached to the

    asked by justin on October 22, 2012
  41. Math College 115

    A hiker can walk 2 miles in 43 minutes. What is his average speed in miles per hour? Round your answer to two decimal places. The hiker's average speed is ___ miles per hour. What formula can be used to find the distance travel, d, in miles in t hours?

    asked by Hneo on September 4, 2016
  42. math

    At a local coffee shop, one customer purchased two muffins and three cups of coffee for $14.47. Another customer ordered 3 muffins and 5 cups of coffee for $23.30. Write and solve a system of equations to find the price of a single muffin and a single cup

    asked by Riya on November 5, 2017
  43. Math/Physics

    The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no

    asked by Kim on October 30, 2014
  44. math

    A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. How many are not using any of the three? 35 said they drove alone. 35 rode in a carpool. 30 rode public transportation. 3 used both carpools

    asked by Mike on December 5, 2012
  45. Physics

    1.A 24 kg crate initially at rest on a horizon floor requires a 75 N horizontal force to set it in motion, once the crate is in motion, a horizontal force 53 N keeps the crate moving with a constant velocity. Find the coefficient of kinetic friction,

    asked by Bob on October 19, 2009
  46. physics need help bad

    A picture of width 43.0 cm, weighing 52.0 N, hangs from a nail by means of flexible wire attached to the sides of the picture frame. The midpoint of the wire passes over the nail, which is 2.50 cm higher than the points where the wire is attached to the

    asked by justin on October 22, 2012
  47. College Chemistry

    give the balanced equation for oxidation of iron(II)ion by permanganate and find how many millimoles of permanganate ion react with one millimole of ammonium iron(II) sulphate. I have the balanced equation: MnO4+8H+5Fe^(2+) --> Mn+4H2O+5Fe^(3+) what would

    asked by Anonymous on July 9, 2012
  48. Math

    Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152 answer: 30th percentile = 113 90th percentile = 200 thank you.

    asked by Cassie on March 20, 2014
  49. need help

    A picture of width 43.0 cm, weighing 52.0 N, hangs from a nail by means of flexible wire attached to the sides of the picture frame. The midpoint of the wire passes over the nail, which is 2.50 cm higher than the points where the wire is attached to the

    asked by justin on October 22, 2012
  50. Algebra 2345678!!

    Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2 The addition method tells you to find common multiples of a coefficient, then add the equations together to eliminate a variable. If you multiply the first equation by 3 and

    asked by Margie on October 14, 2006
  51. physics

    Tom has a mass of 69.0 kg and Sally has a mass of 54.0 kg. Tom and Sally are standing 20.0 m apart on the dance floor. Sally looks up and sees Tom. She feels an attraction. If the attraction is gravitational, find its size. Assume that both Tom and Sally

    asked by Danny on December 3, 2012
  52. accounting

    Consider two bonds on the market: one zero-coupon bond, maturing in exactly 1 year from today and trading at 99% of its par value; another is a 2% coupon bond, maturing in exactly 2 years from today, trading at 101 of its par value. Coupons are being paid

    asked by Anonymous on May 15, 2013
  53. Logarithms

    What's the best way to find Angles using logarithms and vice-versa. Ex: log cot 0.1690 and log sin (25degrees 22min) log sin (25+22/60) = log sin 22.3666666667 = sin 0.38053243281 = (-0.41960832236) Is there a simpler way to do these? I get confused with

    asked by John on September 17, 2013
  54. #6, week 15

    what peninsula do the Wolverines go past to get to Green Bay? Thank you for using the Jiskha Homework Help Forum. The Wolverines are from Michigan and the Green Bay Packers from Wisconsin. Get a good map and look between Michigan and Wisconsin. A peninsula

    asked by rob on December 12, 2006
  55. calculus 1-chemistry

    The relationship between the rate of a certain chemical reaction and temperature under certain circumstances is given byR(T)=0.1(−0.05T^3+4T^2+120)grams/sec, where Ris the rate of reaction and Tis the temperature (in °C). a)Find thetemperature T at

    asked by john on December 21, 2017
  56. physics

    1.) water is flowing through a horizontal pipe of varying crosection, the diameter is 12.0 cm at a pressure of 8.0x10^4 Pa. at section 2, the pipe has a diameter of 6.0 cm and the pressure is 6.0x10^4 Pa. find the speed of water through section 1 and 2

    asked by erjee on September 5, 2013
  57. Chemistry

    Hi, I am trying to figure out how to calculate the average temperature of 2 different chemical solutions based upon the temperatures I measured. The question states: Find the average Ti of HCl & NaOH solutions. The Ti of NaOH solution is: 20.87 C The Ti of

    asked by Jules on March 12, 2012
  58. Physics

    A satellite has a mass of 6146 kg and is in a circular orbit 4.57 × 105 m above the surface of a planet. The period of the orbit is 1.6 hours. The radius of the planet is 4.44 × 106 m. What would be the true weight of the satellite if it were at rest on

    asked by Cat on January 23, 2013
  59. maths

    from the top of a light house the angle of depression of a ship sailing towards it was found to be 30 degrees . after 10 seconds the angle of depresion changes to 60 degrees. assuming that the ship is sailing at uniform speed. find how much time it will

    asked by pooja on November 8, 2011
  60. Vector Calculus

    An airplane is traveling in the direction 20degrees west of north at 700 km/hr. Find the component form of velocity of the airplane assuming that the positive x-axis represents due east and the positive y-axis represents due north.

    asked by Melissa on January 26, 2013
  61. Physics

    I cannot find the answer anywhere on the reading or notes. Which of the following is a primary function of an adaptor that you plug into an ordinary electrical socket? It converts AC input to DC output. It converts AC input to AC output of a different

    asked by Joe on March 15, 2018
  62. mth174

    A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not

    asked by Alex on February 7, 2012
  63. english

    • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. Here is what I wrote, but I am having trouble

    asked by Havingtroublehere on February 27, 2011
  64. Math/Biz Math

    I am so lost. Did I answer these problems right? Bud Ray is the owner of an automatic car wash located in a busy side of town. He currently has all the business he can handle and then some. His business has grown steadily over the years. His current car

    asked by Jose on November 9, 2009
  65. English

    Writeacher, I need you to check a paragraph I wrote some time ago. You revised just part of it. Thank you. 1)Speaker 4 has had lots of interviews lately. He was getting a bit blasé by the time he had my last interview. What he hadn't planned though was he

    asked by Henry2 on February 26, 2012
  66. Algebra2

    How do you get: Show that 0.00317 is a rational number by writing it as a quotient if integers. (the 317 has a line above it.) Please Help? Bob Pursley showed how to do that very question in an earlier post. Look back perhaps 2-3-4 days and you will find

    asked by Jonathan on June 11, 2006
  67. civics

    which would you most likely find a smaller a smaller amount of in a governments budget than in a personal household budget? a. the percent of total income that goes towards national defense and health care b. the percentage of people affected by the budget

    asked by Nani on June 1, 2015
  68. Global History

    I need answers for "GLOBAL HISTORY REGENTS REVIEW" packet. Associated names are Mr. Moeller and Mrs. Sita. I can't find answers anywhere. The packet can be found blank online here: johnbowne DOT

    asked by Nick on May 4, 2014
  69. PHYSICS help!!!!!!

    A commuter train travels between two downtown stations. Because the stations are only 1.36 km apart, the train never reaches its maximum possible cruising speed. During rush hour the engineer minimizes the travel time t between the two stations by

    asked by neeba on September 14, 2012
  70. math

    please check my answers A number cube with the numbers 1 through 6 is rolled. Find the given probability. 1. P(number < 2) (1 point) A. 1/6 *** B. 2/6 C. 4/6 D. 3/6 2. P(number ≥ 3) (1 point) A. 4/6 **** B. 1/6 C. 2/6 D. 5/6 3. P(complement of 4) (1

    asked by please help ms.sue on April 22, 2014
  71. Physics

    A racquet ball is struck in such a way that it leaves the racquet with a speed of 4.8 m/s in the horizontal direction. When the ball hits the court, it is a horizontal distance of 1.94 m from the racquet. Find the height of the racquet ball when it left

    asked by Geoff on August 26, 2016
  72. Physics

    A woman on a bridge 75.0m high sees a raft floating at a constant sped on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 7.00m more to travel before passing under the bridge. The stone

    asked by Irish on January 18, 2012
  73. Calculus

    If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, its height in feet after t seconds is given by f(t)=95t−16t^2 Find the average velocity for the time period beginning when t=1 and lasting (i) 0.5 seconds (ii) 0.1 seconds

    asked by Abby on May 31, 2013
  74. statistics

    on a typical summers day a boat company hires rowing boats at a rate of 9 per hour. a)find the probability of hiring out at least 6 boats in a randomly selected 30 minute period. b) the company has 8 boats to hire and decides to hire them out for 20 minute

    asked by sohaila on September 29, 2014
  75. Physics

    A weather vane initially at rest has a moment of inertiaof 0.100 kg-m2about its axis of rotation. A 50.0 g pieceof clay is thrown at the vane and sticks to it at a point20.0 cm from the axis. The initial velocity of the clay is 15.0 m/s, directed

    asked by Clinton on November 24, 2013
  76. chemistry

    A 12.0g sample of carbohydrate contain 4.50g of carbon, 3.25g of oxygen, and some hydrogen. Determine the percent by mass of hydrogen in your product. Find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is

    asked by jhong on March 13, 2012
  77. physics

    A car is speeding at 25 m/s in a school zone. A police car starts from rest just as the speeder passes and accelerates at a constant rate of 5 m/s2. How fast is the police car traveling when it is 25 m behind the speeding car? I honestly don't know where

    asked by TiffTaff on January 25, 2015
  78. Physics - Projectile Motion

    A ball rolls horizontally off the edge of a tabletop that is 1.60 m high. It strikes the floor at a point 1.58 m horizontally away from the table edge. (Neglect air resistance.) (a) How long was the ball in the air? ___ s (b) What was its speed at the

    asked by TechnoBoi11 on February 1, 2007
  79. Physics

    An alloy of mass 225g is heated to 550C. It is quickly placed in 450g of water at 12C. The water is contained in an aluminum calorimeter cup of mass 210g. The final temperature of mixture is 31.7C. Specific heat of aluminum is 0.215 cal/gC. Find the

    asked by Tsunayoshi on February 3, 2014
  80. statistics

    . For the table that follows, answer the following questions: x y 1 -1 2 -5 3 -9 4 - Would the correlation between x and y in the table above be positive or negative? - Find the missing value of y in the table. The missing value of y = How would the values

    asked by mom on October 4, 2012
  81. Maths

    These questions are about permutations and combination: Find the number of ways in which a class of 20 children can be divided into two groups of 6 and 14 if the class has a set of twins who are inseperable. (ans. is 21624) Four books are taken from a

    asked by Claire on October 8, 2008
  82. statistics

    Can someone guide me on how to solve this problem: A sample of 52 night students ages is obtained in order to estimate the mean age of night school students. sample mean = 25.9 years. the population variance is 23. Give a point estimate for the mean. Find

    asked by concy on January 21, 2012
  83. Calc 1

    A rectangular storage container with an open top is to have a volume of 10 m3. The length of the base is twice the width. Material for the base is thicker and costs $13 per square meter and the material for the sides costs $10 per square meter. Find the

    asked by TayB on May 3, 2015
  84. stats.

    In a transportation study of 20 large cities, it was found that the mean of the number of cars per person was 0.504. (Some of the people in the city are children.) The study also stated that the standard deviation s was 0.123. Find a 95 % confidence

    asked by chris on April 4, 2013
  85. Algebra 1

    A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 80 meters high. The height of the ball is given by the quadratic equation h = -49t^2 + 35t + 140 where h is in meters and t is the time in seconds since the ball

    asked by Sherry on March 7, 2013
  86. Physics

    A hemispherical bowl of radius R is rotated about its axis of symmetry which is kept vertical. A small block is kept in the bowl at a position where the radius makes an angle Θ with the vertical. The block rotates with the bowl without any slipping. The

    asked by Kewal on January 2, 2012
  87. Science ( physics )

    A balloon is rising with a velocity of 4.9 m/sec releases an object from height of 96 m. a) How long after its release will the object reach the ground? b) what is the velocity of the object as it hits the ground? The object has in intial vertical

    asked by Margie on August 1, 2006
  88. physics

    As some molten metal splashes, one droplet flies off to the east with initial speed vi at angle θi above the horizontal, and another droplet flies off to the west with the same speed at the same angle above the horizontal, as inthe figure. In terms of vi

    asked by Anonymous on February 18, 2011
  89. Math

    I'm doing some word problems on finding the areas of rectangles, its just like all complicated. I don't understand how to do them. For example: A square field had 3 m added to its length and 2m added to its width. The area is 90 m2(squared). Find the

    asked by Michelle on April 29, 2009
  90. Physics

    An object of mass M = 884 g lies on a table. It is free to move along a horizontal, frictionless surface. This object is connected to a second object that hangs along the slide of the table by a massless string that runs over a pulley and connects both

    asked by Nala on October 14, 2009
  91. algebra

    An airplane encountered a head wind during a flight between Joppetown and Jawsburgh which took 5 hours and 30 minutes. The return flight took 5hours. If the distance from Joppetown to Jawsburgh is 1600 ​miles, find the airspeed of the plane​ (the

    asked by Brandy on February 7, 2017
  92. Probability & Statistics

    You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 14 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. Find a 95% confidence interval for

    asked by James on July 9, 2012
  93. Calculus - Rates of Change

    A water tank has a shape of an inverted cone with a base radius of 2m and a height of 4 m. If water is being pumped into the tank at a rate of 2m3/min, then find the rate at which the water level is rising when the water is 3m deep. Attempted solution: V=

    asked by Melissa on March 7, 2016
  94. physics

    As some molten metal splashes, one droplet flies off to the east with initial speed vi at angle θi above the horizontal, and another droplet flies off to the west with the same speed at the same angle above the horizontal, as inthe figure. In terms of vi

    asked by natalie on October 15, 2010
  95. physics

    Two crates are connected by a massless rope that passes over a pulley as shown in the figure below. If the crates have mass 32 kg and 80 kg, find their acceleration. If the system begins at rest, with the more massive crate a distance 11 m above the floor,

    asked by kj on February 21, 2009
  96. physics 180A

    A large spring is placed at the bottom of an elevator shaft to minimize the impact in case the elevator cable breaks. A loaded car has mass 480kg, and its maximum height above the spring is 11.8m. In order to minimize the shock, the maximum acceleration of

    asked by Nabby on October 2, 2011
  97. Ashford

    Often, after graduation, students report that they can barely remember some of the concepts they studied in school. This is particularly true if a difficult concept is introduced. As asymptotic notation is perhaps one of the most difficult concepts to

    asked by Sarah on March 19, 2013
  98. science

    find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the

    asked by albert on January 21, 2016
  99. More Rational Exponents!

    1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the height of the driver’s eye above the pavement. All of the

    asked by Brady on February 14, 2014
  100. physics

    A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.16 kg) and embeds itself in block 2 (mass 1.85 kg). The blocks end up with speeds v1 = 0.560 m/s and v2 = 1.36 m/s (Figure (2)).

    asked by Kasie on May 9, 2012

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