1. math

    Explain the notation M^-1 used for the inverse of a square matrix M. I thought M^-1 would be a normal inverse matrix except the numbers would be vertically switched like in fractions...? Not sure though.

    asked by maath on August 12, 2018
  2. Calculus

    An object moves from left to right along a parabolic shaped path y=(1/4)x^2. At the point (-2,1) the speed is 1. What normal acceleration is the object experiencing at that point?

    asked by Tony on February 16, 2016
  3. physics

    A force of 70.0 N is exerted at an angle of 30.0° below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?

    asked by keisha on October 9, 2009
  4. Science

    A force of 70.0 N is exerted at an angle of 30.0° below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?

    asked by Dan Sanchez on February 16, 2010
  5. Physics

    Find the magnetic flux through a circular loop 6.0 cm in diameter oriented with the loop normal at 50 degrees to a uniform 60 mT magnetic field.

    asked by Debra on July 6, 2011
  6. Geometry

    Which of the following angles lands in quadrant IV when placed in standard position? 265 degrees -280 degrees -5 degrees 135 degrees I know what IV quadrant means, but I don't get which one it is in degrees :/ Please help? Thanks

    asked by SkatingDJ on October 7, 2015
  7. Math

    Two triangles are similar, and the ratio of each pair of corresponding sides is 2 : 1. Which statement regarding the two triangles is not true? 1) Their areas have a ratio of 4 : 1. 2) Their altitudes have a ratio of 2 : 1. 3) Their perimeters have a ratio

    asked by Hannah on April 27, 2010
  8. math

    The sum of the angles of a triangle is 180 degrees. In the figure below angle B and angle C are the same size. If angle A is 54 degrees smaller than angle B. Find the measure of each angle.

    asked by Anonymous on January 26, 2016
  9. Chemistry

    Predict how the entropy of the substance is affected in the following processes: a) O2 (g,200 kPa, 300k) --> O2 (g, 100, 300k) b)Br2 (l, 1 bar, 25 degree C) --> Br2 (g, 1 bar, 25 degree C) C)Fe (s, 1 bar, 250 degree C)--> Fe(s, 1 bar, 25 degree C) will

    asked by Alexis on April 20, 2014
  10. Managerial Economics

    This is some HW for a Managerial Econ class. I've got what I think are the answers, and I'd just like someone to read over my reasoning & check my answers. Any assistance is appreciated. Thanks! 2.) A recent study of the Madison, Wisconsin market by

    asked by klynn on October 16, 2007
  11. Physics

    Two archers shoot arrows in the same direction from the same place with the same initial speeds, but at different angles. One shoots at 45.0degrees above the horizontal, while the other shoots at 60.0 degrees.If the arrow launched at 45.0 lands 225 from

    asked by Kara on October 15, 2010
  12. chemistry

    2.) How much heat must be absorbed at 1357 K to melt a bar of copper (80 * 10 * 12 cm) assume d = 8.93 g/cm^3. The normal boiling point is 1357 K, and heat of fusion is 13.05 KJ/mol.

    asked by Andrew on February 15, 2010
  13. Physics

    To move a box you pull on the handle as indicated in the diagram shown below with a constant force F. The mass of the box is m = 8 kg and the angle è = 22°. What is the magnitude of the normal force?

    asked by JennaPoop on November 6, 2012
  14. algebra

    The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.

    asked by Katie on January 28, 2015
  15. statistics

    The final mark in QTQ100T has a normal distribution with an average of 60% and a variance of 100. If we draw a sample of 4 students, the probability that the average mark is more than 56% is

    asked by Anonymous on September 4, 2014
  16. Physics

    A 23 kg child goes down a straight slide inclined 38 degrees above horizontal. The child is acted on by his weight, the normal force from the slide, and kinetic friction.

    asked by Leanna on March 3, 2013
  17. math

    When grizzly bears hibernate, their heart rates go down to 10 beats per minute, which is 20% of normal value. What is a grizzly bear's usual heart rate when not hibernating?

    asked by Anonymous on August 23, 2013
  18. Chemistry

    The normal boiling point of bromine (Br2) is 58.8°C, and its molar enthalpy of vaporization is ΔHvap = 29.6 kJ/mol. Calculate the value of ΔS when 1.00 mol of Br2(l) is vaporized at 58.8°C.?

    asked by Josh G. on December 4, 2012
  19. math

    Benadryl is on sell this week for 20% off of the normal selling price at $10.00 per unit. If the pharmacy purchased Benadryl at $8.00 per unit, what is the gross profit percentage?

    asked by cham on July 28, 2014
  20. statistics

    a normal distribution has a mean of 20 and a standard deviation of 10. Two scores are sampled randomly from the distribution and the second score is subtracted from the first. What is the probability that the difference score will be greater than 5?

    asked by Velvet on December 13, 2016
  21. Statistics

    In 2000,the average charge of tax preparation was $95.Assuming a normal distibution and standard deviation of $10.What proportion of tax preparation fees were more than $95?

    asked by Leslie Meagan on January 3, 2015
  22. grammar

    The patient is alert and oriented and has normal mental status exam. Question: List verb/verbs I know there are two - Answer: is Answer: mental

    asked by Leslie on May 8, 2011
  23. Algebra

    The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.

    asked by Anonymous on February 4, 2016
  24. statistic

    in 2000 the average charge of tax preparation was $95. assuming a normal distribution and a standard deviation of $10. What proportion of tax preparation fees were more than $95 ?

    asked by tolendoy on December 26, 2014
  25. chemistry

    Determine the molarity of in an aqueous solution at equilibrium with air at normal atmospheric pressure. The volume percent of in air is 20.65 Under an pressure of 1.00 , 28.31 of dissolves in 1.00 at 25.

    asked by sab on February 21, 2010
  26. Statistics

    in 2000, the averages change of tax preparation was $95. Assuming a normal distribution and a standard deviation of $10. What proportion of tax preparation fees were more than $95.

    asked by Leo Elvis on March 15, 2015
  27. statistics

    A normal distribution has a mean of 36 and standard deviation of 4. What proportion of the distribution consisted of scores between x=34 and x=38? a, 0.6915 b, 2(0.3085)=0.6170 c, 0.1915 d, 2(0.1915)=0.3930

    asked by Robbie on November 9, 2012
  28. statistics-normal approximation, distrubution

    find the normal appproximation for the binomial probabiolity the x=5,where n=12, and p= 0.7. compare this to the value of p(x=5). *please show calculations and work. want to compare my calculations. thank you. mary

    asked by mary- can someone please solve,lost on October 28, 2010
  29. Calculus

    Find the normals to the curve xy + 2x - y = 0 that are parallel to the line 2x + y = 0. I can find the normal lines and the slope but I don't know what I'm suppose to do with the line 2x + y = 0

    asked by John on March 11, 2010
  30. Calculus

    Find the normals to the curve xy + 2x - y = 0 that are parallel to the line 2x + y = 0. I can find the normal lines and the slope but I don't know what I'm suppose to do with the line 2x + y = 0

    asked by John on March 11, 2010
  31. algebra

    byama rolls a normal dice. What is the probability that he rolls an odd number?Use a word not a number to answer this question

    asked by noor aulia on January 3, 2011
  32. math

    For the pairs of lines defined by the following equations indicate with an "I" if they are identical, a "P" if they are distinct but parallel, an "N" (for "normal") if they are perpendicular, and a "G" (for "general") if they are neither parallel nor

    asked by jp on January 26, 2015
  33. Science- Chemistry

    Could someone please explain a few things? First off, how do you change a normal compound or element and change it to an ion? And second, could you please explain the net ionic equations?

    asked by Mme. Bella on February 11, 2009
  34. class

    Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z-scores: Above .10? Below .10? Above .20? Below .20? Above 1.10? Below 1.10? Above -.10? Below

    asked by eddie wade on May 3, 2015
  35. psychology

    Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z-scores: Above .10 = Below .10 = Above .20 = Below .20 = Above 1.10 = Below 1.10 = Above -.10 =

    asked by eddie wade on May 3, 2015
  36. Physics Again

    How do you calculate the coefficient of friction, if it is not given to you? What would the formula be? It is a measured value. Force friction= mu*normal force. That is the usual method of solving for mu.

    asked by Josiah on November 30, 2006
  37. English

    1. How do you pronounce 'mouths'? (plural form) Can we omit the 'th' sound in normal speech? 2. clothes (We can omit the 'th' sound in this word, right?)

    asked by rfvv on November 13, 2010
  38. Statistics

    Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores (a) above .10, (b) below .10, (c) above .20, (d) below .20, (e) above 1.10, (f) below

    asked by Michael on April 9, 2012
  39. Chemistry:normal notation plz help

    Using the normal notation of quantum number find the element which has the following value of quantum number n=3 l=2 m=2 s=+1/2 (a):potassuim (b):nitrogen (c):sodium (d):scandium

    asked by Collins on January 6, 2016
  40. Statistics

    Need help! A normal distribution with a mean of 20 and a standard deviation of 2 is evaluated to solve a business problem. What is the probability that the value in the population is between 20 and 30? What is the probability that any value in the

    asked by Student on August 21, 2008
  41. statistics

    The researcher wanted to test the hypothesis that Ho: μ=3, knowing the population, which was normal, had a variance of 1.00. -- How powerful would this test be against the alternative hypothesis that Ha: μ=4, given that n=15, α = .05

    asked by Lezlie on June 4, 2008
  42. physics

    the mass of the ball is 0.43kg and the weight of the player is 900N.the player is at rest.whAt is the normal force exerted on the exerted?

    asked by Anonymous on April 15, 2013
  43. Chemistry

    Chlorine has two isotopes with mass number 35 and 37. Calculate the relative abundance of the two isotopes accounting for normal atomic mass of 35.5

    asked by Iyana on August 18, 2016
  44. Phyics

    A ray of light strikes a mirror at an angle of 26 degrees to the normal. What is the angle of reflection? Answer in units of degrees .

    asked by Maria on February 27, 2011
  45. chemistry

    22 ml nitric acid neutralises 20 ml , 0.5 normal sodium hydroxide sollution. calculate weight of nitric acid in 500 ml?

    asked by Anonymous on September 8, 2013
  46. math

    The Nursing Home Problem. Suppose that the cost of nursing homes (per year) for the following states is as follows for 2004: Alaska: $165,000 Connecticut $95,000 Hawaii $85,000 New York $110,000 If each state had a $10,000 cost increase since 1994, rank

    asked by Aleah on July 15, 2009
  47. ~CHEM~

    If I had an equilibrium of CH3CO2(aq) + H(aq) CH3CO2H(aq) and the applied stress was HCl and NaOH what observations should I expect and what direction would the equliibrium shift? Same goes to this question equilibrium:Fe(aq) + SCN(aq) FeSCN(aq) the

    asked by Jason on May 16, 2007
  48. physics

    An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. (a) What is the electric field energy density at P? (b) A parallel-plate capacitor whose plates have area 0.110 m2 has a uniform electric field between its

    asked by Beth on March 8, 2013
  49. math

    Elizabeth earns a weekly salary of $165 plus a 10% commission on sales. Find her total income for a week when her total sales were $2800. They got $445. How did they get that and what is commissions? $165 + 10% of $2800 is the answer. Do the numbers. 165 +

    asked by Mack on June 27, 2007
  50. Physics

    A rabbit runs in a straight line with a velocity of +1.3 m/s for a period of time, rests for 11 s, and then runs again along the same line at +0.65 m/s for an unknown amount of time. The rabbit travels a total distance of 1080 m, and its average speed is

    asked by Wendy on January 22, 2015
  51. physics

    An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +40 ft/s2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for a time t2. If the total distance traveled by the

    asked by kinematics on February 11, 2008
  52. Probability and Statistics

    In a toy manufacturing company three machines A,B and C are employed to manufactures toys. Machines A, B and C manufacture 20%, 30% and 50% of the total toys respectively. A quality control officer examined the machines and found that A,B and C produce 2%,

    asked by Question on October 29, 2015
  53. Physics

    A basketball player, standing near the basket to grab a rebound, jumps 73.6 cm vertically. How much time does the player spend in the bottom 15.4 cm of the jump? I think I have this right, but I'd like someone to make sure. First I have to find the total

    asked by Lindsay on October 9, 2007
  54. math

    Biologists want to st up a station to test alligators in a lake for west niles virus. Suppose that the cost for such a station are 2,500 for setup costs and 3.00 to administer each test. A) write an expression that gives the total cost to test x animals.

    asked by tera on March 25, 2009
  55. math

    a shaded portion of a rectangle is 2/5 of the total area....How much of the total area is not shaded...A.5/2 B.3/5 c.5/3 d.3/10.

    asked by michelle on March 8, 2010
  56. STATISTICS

    A) If a regression experiment has correlation coefficient r= 0.75, what precent of total variation is explained by the regression? B) if 85% of total variation is explained by the regression, and there is an inverse relationship between y and x, then what

    asked by SROBSON on April 17, 2011
  57. Geometry equation

    I do not understand how to work a problem or equation out for geometry. The equation refers to two parrellel lines that have a transversal line running diagonal through each one. The exterior anglebottom left part of the top parrellel line, measures at 52

    asked by BWB on May 11, 2010
  58. physics

    The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are anchored to walls at right angles with the tensions shown in the figure. What is the magnitude of the tension T3 in the third rope, if T1 = 48.8 N, T2 =

    asked by Jay- just need help! on October 31, 2010
  59. Math

    Find the approximate number of radians, to the nearest hundreth, in the angles with the following dergree measures. a) 60 degrees b) 128.5 degrees c) 150 degrees d) 80 degrees e) 145 degrees f) 325 degrees g) 56.4 degrees h) 230 degrees Please help answer

    asked by Jiskha lover:D on December 18, 2012
  60. phy

    A velodrome is built for use in the Olympics (see the figure below). The radius of curvature of the surface is 17.1 m. At what angle should the surface be banked for cyclists moving at 11 m/s? (Choose an angle so that no frictional force is needed to keep

    asked by faaash on February 19, 2013
  61. physics

    The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are anchored to walls at right angles with the tensions shown in the figure. What is the magnitude of the tension T3 in the third rope, if T1 = 48.8 N, T2 =

    asked by Jay- just need help! on October 31, 2010
  62. Trigonometry (Law of Sine)

    Triangulation can be used to find the location of an object by measuring the angles to the object from two points at the end of a baseline. Two lookouts 20 miles apart on the coast spot a ship at sea. Using the figure below find the distance, d, the ship

    asked by Alianne on February 25, 2012
  63. Math

    Say for example that you need to find out the number of people that need emergency housing for in a neighbourhood. would you multiply the population of the area by the total percentage of risk. ex. barnyard population 325 risk is 40% ... do you go 325 time

    asked by Karley on September 28, 2008
  64. math

    tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t=20n t total bill was equals 20t 20 times number of people some purists will insist on writing it 20n = t either way is correct

    asked by school girl on April 25, 2007
  65. Geometry

    Mr. Thompson has been asked to add storage space to a garage. He estimates 6 square feet per individual will be required to meet the needs of 12 people. If the storage space is 15% of the total amount of space required, how much total space does Mr.

    asked by Ivan on January 18, 2011
  66. math

    A player drawn a face card and a 3 and a 4 from a standard deck of cards (without an ace). According to the rules of blackjack a face card counts as a 10. What is the probability that the next card she draws will bring her total to 21 ? what is the

    asked by Sam on July 12, 2017
  67. math

    write an equation that describes Felicia's total cost for playing tennis as a function of the number of times she plays. let c =the total cost and let n = the number of times she plays. Describe the domain and range of the function.

    asked by paul on October 21, 2013
  68. Algebra

    Can someone look over this and advise me if these are wrong? When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round

    asked by Anonymous on May 22, 2008
  69. Urgent Calculus Help

    Based on the following table of values for the function w(t), answer the questions below. t and w(t) are a table with the following values: (100,2.6), (110,7.3), (120,12.7), (130,19), (140,26.1), (150,34.1) a) Which of the following best describes the

    asked by Anonymous on July 3, 2014
  70. sixth grade math

    Find the percent of each number. 1. 5% of 220 files Answer is 110 2. 360 kilometers is 24% of ___ kilometers. Answer is 864. 3. At a shelter, 15% of the dogs are puppies. There are 60 dogs at the shelter. How many are puppies? Answer is 25 puppies Can

    asked by Stephon on November 13, 2014
  71. math

    Okay, so there is circle S. There are two tangents of this circle that intersect, so it almost looks like a cone? the angle of the intersected tangents is 20º. The arc that the "cone" intersects is 4x. I have to figure out what X is. THe answer is 110 but

    asked by Emily on March 21, 2007
  72. geometry

    Given: QRST is a parallelogram. Prove: QRST is a square. Complete the proof below by choosing the reason for line number 2 and line number 6. Reason Statement 1. QRST is a parallelogram. Given 2. QRST is a rectangle 3. is a right angle Definition of a

    asked by karrie on January 5, 2012
  73. Statistics

    Draw a vertical line through s normal distribution for each of the following z-score locations. Determine whether the tail is on the right or left side of the line and find the proportion in the tail. a. z=2.00 b. z=0.60 c. z= -1.30 d. z= -0.30

    asked by Lyndyc on December 6, 2013
  74. math

    Over 60% of the people who fly to Normal, Illinois, do so on American Airlines. Hence, most people prefer American to any other airline. describe the misuse or misinterpretation of statistics that may be involved.

    asked by jessica on August 7, 2009
  75. Chemistry

    The normal boiling point of benzene is 80 degree C and its heat of vaporizations is 30.8 kj/mol. What is its boiling point at the top of Pikes Peak where P=260 mmHg?

    asked by Tyler on April 27, 2011
  76. Statistics

    I have no idea on how to answer this question... "Use technology or a standard normal distribution table to find the area to the left of z=1.58. Do I plug in 1.58 in my calculator to find the answer?

    asked by Jim on September 13, 2013
  77. Statistics

    I have no idea on how to answer this question... "Use technology or a standard normal distribution table to find the area to the left of z=1.58. Do I plug in 1.58 in my calculator to find the answer?

    asked by Jim on September 13, 2013
  78. Calculus

    Find the equation of the tangent line and the normal line to the graph of the equation at the indicated point. x^2-y^2=16, (5,3) I need to show work, so answers formatted in this manner would be most appreciated. Thanks! :) :)

    asked by Jon on November 11, 2007
  79. stat

    Draw a vertical line through a normal distribution for each of the following z- score locations. Determine whether the body is on the right or left side of the line and find the proportion in the body. (a). z = 2.20 (b) z = 1.60 (c) z = -1.50 (d) z = -

    asked by Anonymous on December 19, 2010
  80. statistics

    Suppose X has a mound-shaped distribution with sigma=9. A random sample of size 36 has a sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean u?

    asked by Tracey on June 5, 2012
  81. Statistics

    Draw a vertical line through a normal distribution for each of the following z-score locations. Determine whether the body is on the right or left side od the line and find the proportion in the body. a. z= 2.20 b. z= 1.60 c. z= -1.50 d. z= -0.70

    asked by Lyndyc on December 6, 2013
  82. statistics

    The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 78 on the exam is in what percentile of the school?

    asked by Anonymous on December 24, 2010
  83. College Stat

    Draw a vertical line through a normal distribution for each of the following z- score locations. Determine whether the body is on the right or left side of the line and find the proportion in the body. (a). z = 2.20 (b) z = 1.60 (c) z = -1.50 (d) z = -

    asked by jackie on October 19, 2010
  84. Statics

    Assume that the population is normal. A sample of size 100 is taken. The resultant sample data has a mean of 48 and a standard deviation of 15. Construct the 99% confidence interval for the population mean.

    asked by Heather on December 2, 2012
  85. stats ( please check)

    6. X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities: (A) P(x < 77.0) (B) P(75.0 < x < 85.0) (C) P(x > 85.0) (Points : 6) I think I have the first two but I am stumped on the third one. Thank

    asked by Celest on July 24, 2011
  86. statistics

    We have a group of 75 people and for their raw scores, you are given the Mean (M = 30) and variance (VAR = 16). Assuming a normal distribution of scores, what is the probability of randomly selecting a score between 27 and 31 for this group?

    asked by james akbar on February 29, 2012
  87. STATS PLZ ANSWER

    We record the neuroticism ratings of a group of subjects. The subjects have different scores and they fall into normal distributions. In this example, neuroticism is a(n): the answer is Variable, but I don't understand why?

    asked by Alicia Estrada on March 9, 2015
  88. statistics

    I don't understand how to answer this: relate the three measures of central tendency to a normal distribution- I looked it up online and it said that the mean, median, and mode are all the same but i don't understand how that can be

    asked by katie on February 12, 2009
  89. science

    A force of 16.0 newtons is sufficient to set a box that is at rest into motion. If the coefficient of static friction is 0.380, what is the normal force acting on the box?

    asked by kevin on June 24, 2015
  90. calculus: multivariable

    Find the points on the hyperboloid x2 −y2 +2z2 = 1 where the normal line is parallel to the line that joins the points (3,−1, 0) and (5, 3, 6). Please show me how to do it..the answer is [+- rad 6/(3), +- 2rad 6/(3), +- rad6/(3)]

    asked by sara on May 3, 2008
  91. Genetics biology

    A man and his wife both have normal vision, but a daughter who has color blindness can the man sue his wife for infidelity? show the cross help me please, have been lots of people saying no and yes to this

    asked by Mandy on February 20, 2015
  92. physics

    A block of mass m = 14 kg is pressed with a horizontal force F against a frictionless ramp of angle θ = 78∘. What is the magnitude of the normal force exerted by the incline surface on the block?

    asked by ss01 on October 1, 2013
  93. Interest

    It’s time to go shopping! You grab your Best Purchase credit card, which has an annual interest rate of 18%. The unpaid balance on your card for the current billing cycle is $285.76. On your shopping trip, you purchase four items: a Blu-ray player, two

    asked by Mary on May 7, 2013
  94. Science/Anatomy

    I have the formula to the problem but am unsure of my answer.. Problem: Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat, end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml.

    asked by Mary/please help on June 6, 2016
  95. physics

    two large horizontal metal plates are separated by 4mm. the lower plate is at a potential of -6V. what potential should be applied to the upper plate to create electric field strength of 4000V/m upwards between the plate

    asked by muhammed on May 13, 2014
  96. science

    a stone 5kg was tied to an elastic rope 12m of length it was pulled until 60 was made at the top ,when 180m reach ,calculate the distance which the stone move and force which was applied to move the stone

    asked by Adjetey mustapha on August 2, 2018
  97. Physics

    A 20.0 kg crate is pushed across a rough floor for a distance of 90.0 cm. When the force pushing the block is equal to 80.0 N and applied at an angle of 18.0 below horizontal to the block, the block moves at a constant speed of 2.10 m/s. What is the net

    asked by Diana on October 15, 2010
  98. advanced science

    A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the acceleration of the crate? (Hint: remember to find net force first) a=6.00 m/s2 a=28.1 m/s2

    asked by Beth on June 3, 2016
  99. PHYSICS

    An applied force accelerates a 50-kg crate along a frictionless floor from rest to 5 m/s.The work performed by this force is most nearly 125 J 250 J(x) 500 J 625 J 1,250 J Can someone please explain this to me and help? I thought it was 250 J but my

    asked by Chris on June 2, 2012
  100. Physics

    A train is traveling down a straight track at 25 m/s when the engineer applies the brakes, resulting in an acceleration of −1.0 m/s2 as long as the train is in motion. How far does the train move during a 50 s time interval starting at the instant the

    asked by <3 on September 11, 2013