1. math

    OT is a vertical mast of height h. From A, a m due south of O, the angle of elevation of T is 30 degree. If B is a point 2a m from A, on a bearing of 060 degree, find the angle of elevation of T from B.

    asked by somay on January 27, 2016
  2. Maths

    Ship A is 18.5km from a port P on a beearing of 045 degree and ship B is 26.4km from point P on a bearing of 105 degree. Calculate the bearing of A from B and the distance AB.

    asked by Shane on May 6, 2013
  3. Chemistry

    Calculate the pH at the equivalence point of 25.0 mL of a 0.100 M acetic acid, CH3COOH, titrated with a 0.100 M sodium hydroxide, NaOH. Ka of acetic acid is 1x10^-5

    asked by Anonymous on April 11, 2010
  4. Chemistry

    Acetone has a delta Hvap of 29.1 kj/mol and a normal boiling point of 56.2 degrees Celsius. At what temperature (in degrees Celsius) does acetone have a Pvap = 118 mm Hg?

    asked by Brennan on March 19, 2013
  5. physics

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

    asked by beti on February 7, 2014
  6. Maths

    A curve is such that dy/dx = 2- 8(3x+4)^-1/2 - A point P moves along the curve in such a way that the x-coordinates is increasing at a constant rate of 0.3 units per second. Find the rate of change of the y-coordinates as P crosses at the y-axis.

    asked by Anon on September 10, 2016
  7. Physics

    Calculate the angle θ between the radiusvector of the point and the positive x axis (measured counterclockwise from the positive x axis, within the limits of −180◦ to +180◦). Answer in units of ◦.

    asked by Fernando on September 12, 2018
  8. math

    BC is a chord of a circle with center O and area 48pi. Point A is inside BCO such that ABC is equilateral and A is the circumcenter of BCO. What is the area of triangle ABC

    asked by da on March 26, 2017
  9. Differential Equations

    we are to find the power series solution for y'=xy. I have calculated to the point that I believe the answer is c_0/2^n*n! First of all is this correct and secondly, how do I write the solution in terms of c_0 * summation of something in terms of x^n?

    asked by Anonymous on April 22, 2018
  10. physics

    A bus is pushed forward and released at = 3.5 with a speed of 1.0 . It rolls at a steady speed for 1.2 , then one wheel begins to stick. The bus comes to a stop 3.4 from the point at which it was released.

    asked by smarth on September 17, 2011
  11. Beginner Alegra

    From a point on a straight road, Nico and Maria are riding bicycles in the same direction. Nico rides at 12mph and Maria rides at 14mph. In how many hours will they be 11 mi apart?

    asked by Jen on June 17, 2012
  12. math

    car m takes 5hr to travel from point a to b.it would have taken 6 hr,if same car had travelled the same distance at a speed which was 15km/hr less than its original speed.what is distance between a and b ? (ans 450 km)

    asked by xyz on November 20, 2017
  13. math

    Draw a diagram to show that there are two tangent lines to the parabola y = x2 that pass through the point (0, −25). Find the coordinates of the points where these tangent lines intersect the parabola.

    asked by Kyle on January 9, 2016
  14. vertical motion physics

    a body projected vertically up from ground crosses a point Pafter 4 seconds and again after 6 seconds Maximum height reached by that body above the ground is (g=10m/s)

    asked by devi on November 23, 2016
  15. Chemistry

    Help! I have to get this done tonight and I cannot get this answer right. A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 3.55 ∘C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water

    asked by Emmalee on February 28, 2016
  16. Math

    Two conjugate diameters of the ellipse x^2/a^2+y^2/b^2=1 are drawn to meet the directrix at P and Q. PM is drawn perpendicular to OQ and ON perpendicular to OP. Prove that PM and ON meet at a fixed point and state its coordinates.

    asked by Bushy on April 28, 2015
  17. Statistics

    From the following list of number of discharges each day in September, compute the mean, median, mode, and range. Round the mean and median to one decimal point. Day # of discharges 1 27 2 22 3 35 4 63 5 42 6 55 7 62 8 65 9 32 10 35 11 36 12 75 13 65 14 84

    asked by John on April 24, 2014
  18. math

    A long-distance runner runs 3 miles south and then 7 miles east. How far is the runner from the starting point A) 8.616 mi B) 10 mi C) 7.616 mi D) 4.472 mi I think it is eaither A or C but not sure

    asked by badatmath on October 7, 2009
  19. lattice point

    A lattice point is an ordered pair (x, y) where both x and y are integers. A triangle is formed by the three points (1, 1), (9, 1) and (9, n). For what integer value of n 0 are there exactly 560 lattice points strictly in the interior of the triangle?

    asked by Anonymous on June 27, 2012
  20. physics

    a uniform pole 20 ft. long and weighing 80 lb. is suspected by a boy 2.0 ft.from end A and a man 5.0 ft. from end B .at what point should a load of 100 lb. be placed on so that the man will support twice as much as the boy?

    asked by herher on September 7, 2015
  21. Physics

    Suppose you want to take a chest X-ray with an X-ray source that has a divergence of 2^o . If the film is 1 meters from the (point) source, how big is the spot size at the film in centimeters?

    asked by Kelly on October 9, 2009
  22. Calculus

    Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x)=9x^1/3+9/2x^4/3. I've gotten -0.5 as the relative minimum and x=1 for the inflection points. Is this correct? If not, can you show me how to get the correct answer

    asked by Kait on December 17, 2017
  23. Physics

    A boy tosses a football upward. If the football rises a vertical distance of 1.1 m and the boy catches it at the same point he released it, what is the velocity of the ball just before he catches it?

    asked by Aaron on January 27, 2012
  24. physics

    Use the table of 7.3 to find the point between the Earth and the Sun at which an object can be placed so that the net gravitational force exerted on it by these two objects is zero. TABLE 7.3

    asked by becky on January 8, 2007
  25. Calculus

    Find the intervals on which the given function is increasing and decreasing. y=-x^2-2x y'=-2x-2 critical point x=-1 Increasing [-infinity,-1) Decreasing (-1,infinity] is this the correct way of writting this wiht the brackets

    asked by kieran on September 24, 2012
  26. Physics

    What is the velocity at the midway point of a ball able to reach a height y when thrown with an initial velocity v0? (Assume the ball is thrown upward and that up is the positive direction. Use the following as necessary: y and g. )

    asked by emily on September 4, 2011
  27. stats

    research shows that 14.3% of persons 20-25 years old and 59.9 % of persons 60-65 years old vote. What is the absolute increase from the younger group to the older group to the nearest point?

    asked by Anonymous on May 9, 2015
  28. CHEMISTRY

    A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?

    asked by NEHE on October 11, 2013
  29. accounting

    Sherrod, Inc., reported pretax accounting income of $89 million for 2006. The following information relates to differences between pretax accounting income and taxable income: Income from installment sales of properties included in pretax accounting income

    asked by Steve on March 28, 2008
  30. spanish

    Ayer mis amigos Esteban, Ana, Olivia y yo fuimos al cine a ver la nueva película de Javier Bardem. A mí me (1) ____ la película porque Javier es uno de mis actores favoritos. Pero a (2)____ le (3)______ ; él empezó a dormirse al final. A Ana y

    asked by Kayee on October 7, 2013
  31. teacher aide examniation number 02604200

    1. A common symptom of a behavior disorder is 2. When children have accidents with bowel or bladder control, the teacher aide should 3. When working with behavior disordered children in the classroom, the teacher aide can modify behavior by 4. In a regular

    asked by teachers aide and early childhood education settin on June 20, 2011
  32. calculus

    a particle moves along a number line measured in cm so that its position at time t sec is given by s=72/(t+2) +k, k is a constant and t>=0 seconds. (a) Find the instantaneous velocity of the particle at t=4 seconds (b) Find the acceleration of the particle

    asked by nadra on February 4, 2011
  33. Calculus

    In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 _< t _< 30) a. Find the position function of the

    asked by Mimi on April 26, 2013
  34. Calculus

    In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 ¡Ü t ¡Ü 30) a. Find the position function of

    asked by Mimi on April 26, 2013
  35. Physics

    A helicopter is flying in a straight line over a level field at a constant speed of 6.2 m/s and at a constant altitude of 11.3 m. A package is ejected horizontally from the helicopter with an initial velocity of 14.0 m/s relative to the helicopter, and in

    asked by Dave on June 9, 2013
  36. calculus

    The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one three times as strong as the other, are placed 11 ft

    asked by robert on June 30, 2009
  37. stats

    Find the explained variation for the paired data. The equation of the regression line for the paired data below is y-hat = 3x. Find the explained variation. x= 2 4 5 6 y= 7 11 13 20

    asked by bre on May 22, 2015
  38. Chemistry

    I had a quiz today and one of the multiple choice questions was something like, "find the final temperature of aluminum when it is cooled" and then it gave you the specific heat capacity of aluminum, the mass of the aluminum, initial temperature, and

    asked by a Canadian on February 21, 2013
  39. English please help

    I really need someone to check my answers. Cross out prepositional phrases, identify adverbs. 1.) Our maid cleaned the top of the counter and looked amid the groceries throughout the refrigerator. Verb: cleaned, looked Subject: maid Phrase: the top of the

    asked by Juliet on December 6, 2015
  40. Econ

    Chip's Chocolate Factory has an agreement with its workers to completely index the wages of its employees to inflation in the CPI. Chip's currently pays its production line workers $20 an hour and is scheduled to index their wages today. If the CPI is

    asked by Alena on January 30, 2017
  41. Math 1350

    One rectangular table seats three people along each side and two people are seated at each end. The tables are place end-to-end in one long line. Draw a series of pictures that will help you find a pattern to predict how many tables will be needed to seat

    asked by Ne Ne on October 26, 2015
  42. Chemistry

    Two substances, gold and granite, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of gold is 20.2 g and its initial temperature is 58.2 ∘C. The mass of granite is 29.1 g and its initial temperature is 20.1

    asked by Diana on October 14, 2016
  43. physics

    Two forces of magnitude 20 newtons and 25 newtons respectively act at a point. If the resultant force is 39 newtons, the angle between the forces has to be nearly?

    asked by raghavendra on July 5, 2014
  44. geometry

    8. iN triangle ABC, a point D is on AC so that AB=AD. ANGLE ABC - ANGLE ACB = 30. IND ANGLE CBD. PLEASE TELL ME WHAT TO DO. I BEG YOU. PLEASE

    asked by nicole on October 22, 2013
  45. Combining Inequalities

    Some treasure has been buried at a point(x,y)on the grid, where x and y are whole numbers. Here are three clues to help you to find the treasure: Clue 1:x>2 Clue 2:x+y0

    asked by William on May 23, 2013
  46. GEOMETRY TRIANGLE

    IN TRIANGLE ABC, A POINT D IS ON AC SO THAT AB=BD. ANGLE ABC - ANGLE ACB = 30. FIND ANGLE CBD HELP NNNNNDEEEEEDDDD PLEASE

    asked by Barbie Lee on October 24, 2013
  47. Literature 1010

    A topic statement is made up of a limited topic and a writer's point about the limited topic? True Or False.

    asked by Alex on March 6, 2011
  48. Geometry

    Graph the following quadrilateral: A(-2,-3) B(-1,1) C(4,-1) D(3,-5) Graph quadrilateral ABCD after a translation which moves point D to the origin. Label the new quadrilateral A' B' C' D'.

    asked by iceberg on January 6, 2015
  49. math

    The center of a circle is located at (–5, 2) and a point on the circle is located at (5, -22). Which other points are also on the circle? (-29, -8) (-31, 5) (5, 26) (19, 12) (19, -6) So the answers i got that work is 1.(-31,5) 2.(-29,-8) 3.(19,12) That

    asked by Jakis on March 2, 2017
  50. maths

    in triangle abc angle b = 2angle c.d is a point ob bc such that ad bisects angle bac and ab = cd.prove that angle bac = 72

    asked by rajat garg on August 15, 2012
  51. Calculus

    Consider the following function. f(x) = (2 − x)^(e^−x) (a) Find the intervals of increase or decrease. (b) Find the intervals of concavity. (c) Find the point of inflection. (x, y) =

    asked by Fisher on January 17, 2016
  52. Algebra 2

    I need help, and I can't find the answer. Can you explain how to do this please? I don't want the answer only, I need to know the answer, and how to find it. Thank you!! 9. What is the equation of the absolute value function? (1 point) y = 6|x + 2| –2 y

    asked by Jenn on September 25, 2012
  53. Physics

    There are 3 charges situated on the x-axis: a +3.0 nC charge at (-3 cm, 0), a +4.0 nC charge at the origin (0, 0) and a -6.0 nC charge at (3 cm, 0). What is the electric potential at the point (0, 3 cm) on the y-axis?

    asked by Mr. Science on February 10, 2011
  54. algebra

    write an equation for a graph in slope-intercept form if the slope of the graph is 5/-4 and one of the coordinates of a point on the graph is 1,-1).

    asked by Blue13 on January 3, 2011
  55. Physics

    A force of 20 N acts toward the west. Another force acts at the same point so that the resultant of the two forces is zero. What is the magnitude and direction of the second force?

    asked by Shelby on March 4, 2013
  56. Math

    How would I find point slope form, slope intercept form, and standard form for these three sets of coordinates. (5,3) (5,-1) (2,6) (4,-2) (-4,-3) (-1,-4)

    asked by Anonymous on September 11, 2012
  57. math- exponents and logs

    5,000=55.66 (1.114)^x (i.e. What is x?) ln 5,000= x ln 55.66 1.114 I keep getting 2 point something, but does this make sense? My calculator display looks like this: ln 5000/ln (55.66)(1.114)

    asked by Phoebe on March 4, 2013
  58. Language Arts

    A Surprising Point of View: A Television Play in Two Acts Characters: (in order of appearance) 1. JASON: a boy of about 14. He is a student in Ms. Smith’s English class. He regularly misbehaves in order to get attention, and he doesn’t apply himself to

    asked by Scarlet on May 15, 2016
  59. Geometry

    Draw two parallel lines on yuour paper. Locate four points on the paper, each an equal distance from both lines. Describe the figure you get if you continue to locate points, each an equal distance from both line. I don't get where to put the points.

    asked by Jackie on August 19, 2008
  60. physics

    An airplane flies 200 km due west from city A to city B and then 305 km in the direction of 30.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? ___km (b) Relative to city A, in what direction is city C?

    asked by jc on September 21, 2010
  61. Algebra II - Word Problem

    A convenience store clerk can wait on 6 customers per minute. If customers arrive at an average rate of x people per minute, the time T spent in line is: T=1/6-x, where 0

    asked by John on November 20, 2012
  62. Physics

    At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when

    asked by Dan on February 26, 2013
  63. Algebra II - Word Problem

    A convenience store clerk can wait on 6 customers per minute. If customers arrive at an average rate of x people per minute, the time T spent in line is T = 1/(6-x), where 0

    asked by John on November 15, 2012
  64. Analytic Geometry

    A square is a quadrilateral with four equal sides. The area of a square is equal to square of its sides. The diagonal of a square is a line segment joining any two non-consecutive side. Find the area of a square and the length of its diagonal whose

    asked by Jnr John on August 10, 2014
  65. social sciences

    The market supply for potatoes in New York is 2,000 tons for a price of $200 a ton, and 5,000 tons for a price of $500 a ton. Between these two prices market supply is a straight line. What is the equation of the supply curve?

    asked by Joe on October 2, 2012
  66. intermediate econ

    You buy only apples and bananas. Your budget is such that you can purchase 3 apples and 4 bananas or 9 apples and 2 bananas. Write down the equation for the budget line with bananas on the y-axis. Is that equation unique? I believe the answer is:

    asked by Teri on June 23, 2009
  67. physics

    a body travelling along a straight line travels one half of the total distance with the velocity V0.The remaining part of the distance was covered with the velocity of V1 for half of the time and with velocity V2 for other half of time. Find average

    asked by samarth on May 22, 2015
  68. science

    (a) An airplane flies at constant speed along a straight line at an angle of 30' with the horizontal. The weight of the airplane is 80000 N and its engine provides a thrust of 100000 N in the direction of flight. Determine the lift force perpendicular to

    asked by shubham kumar on April 27, 2017
  69. Math Calculus

    Suppose g(x) = 6x arctan (ln x/(x^3+2)) Plot y = g(x) in the square window defined by 0 ≤ x ≤ 2 and −1 ≤ y ≤ 1. Also plot the secant lines connecting (1, g(1)) and (1 + h, g(1 + h)) for h = .5 and h = .25 in the same window. Give a table of

    asked by Anonymous on October 8, 2012
  70. Algebra 1

    1)A farmer plans to create a rectangular garden that he will enclose with chicken wire. The garden can be no more than 30 ft wide. The farmer would like to use at most 180 ft. of chicken wire. Write a system of linear inequalities that models this

    asked by Hally on January 2, 2013
  71. Chemistry

    A line in the Lyman series of the hydrogen atom emission results from the transition of an electron from the n=3 level to the ground state level. a) What n level (#) is the ground state level for the hydrogen atom? b) What is the energy of this photon in

    asked by Ashley on July 18, 2011
  72. science!! please help me!!

    1)When evolution was first proposed, which of the following was used as evidence to support the idea? (1 point) A)observations of nature*** B)laboratory experiments C)extensive fossil collections D)genetic sequences 2)How did Darwin and Lamarck differ in

    asked by abby on October 11, 2014
  73. Algebra

    I am having trouble with this one… Can someone please show me the steps, the pairs to plot and the asymptotic? Thank you in advance! Evaluate the logarithmic equation for three values of x that are greater than 2, three values of x that are between 1 and

    asked by Kris on June 16, 2010
  74. Math

    You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data is -0.993. How confident can you be that your predicted value will be reasonably close to the actual value? a. I can't be

    asked by Kaai97 on December 14, 2015
  75. biology please check answer

    1. Explain how the small intestine is specialized for digestion and absorption. The small intestine is specialized for absorption by the huge number of villi that line the intestinal wall. Villi have cells that produce intestinal enzymes which complete the

    asked by sam on April 26, 2009
  76. business law

    Ron supervises delivery of flowers for a wholesale distributor of fresh flowers, Flowers. Inc. In order to accommodate one of the company’s best customers, Ron offers to immediately rush a delivery of fresh peonies. All of the delivery trucks are

    asked by sarena on February 4, 2012
  77. British Literature

    Identify the Speaker of the passage from twelfth Night by writing the corresponding letter on the blank line.. a. olivia b. orsino c. sebastian d. viola e. feste 18. I see you what you are: you are too proud. But, if you were the devil, you are fair. 19. I

    asked by dani g on February 12, 2013
  78. English - help Poe

    1. The words "jingling, tinkling" in line 14 of "The Bells" are NOT an example of ? A.repetition ***** B.assonance C. consonance 2. Which if the following sentences uses an adjective in the positive degree? A. The whole coast was beaten by harsh

    asked by Cassie on March 11, 2014
  79. English

    Let's write down what you can do with the computer. 1. I use the computer to chat with netizens in chatrooms. 2. I use the computer to do paper work. 3. I use the computer to make documents with the word processor, Excel. 4. I use the computer to surf the

    asked by rfvv on April 10, 2010
  80. Chemistry

    I have this question which I believe I solved correctly, but I was wondering if someone could look it over to make sure? The question is... Assay for Vitamin A (a fat soluble vitamin) required an extraction step into ether. In this assay, 2.00 mL of serum

    asked by Rob on January 11, 2013
  81. history

    Which statement about ethnic groups in Southwest Asia is accurate? A. Arabs are the majority in every country in the region. B. Arabs are the largest ethnic group in the region. C. Kurds make up the largest ethnic group on the Arabian Peninsula. D. People

    asked by Jane on January 14, 2019
  82. English

    This is the other poem which I have created, with a positve mind:-) The last one was a Mood Poem; This one is a 'I do not understand' poem Here are the instructions for it: A. Begin the poem with "I do not understand." B. List three things you do not

    asked by Sara on April 9, 2010
  83. micoeconomics

    in regards to equilibrium in exchange and production. An exchange economy is characterised by the number of agents in it, the preferences or utility functions of the agents, the number of goods and the endowments of the agents. by looking at my notes i

    asked by susan on November 14, 2006
  84. Math help plz check my answers!

    1. Write the ratio in the simplest form. 50:10 25:5 10:2 5:1 1:5 2. Solve the following proportion. r/5= 9/21 r = 9 r = 2.14 r = 11.66 r = 37.8 3. A recipe calls for 3 cups of flour to make 3 dozen cookies. Use the proportion to calculate how much flour is

    asked by sally on November 23, 2013
  85. physics

    A science student is riding on a flatcar of a train traveling along a strait, horizontal track at a consistent speed of 12 m/s. The student throws a ball into the air along a path he judges to make an initial angle of 65 degrees with the horizontal and to

    asked by Cali on June 1, 2018
  86. Physics

    A science student is riding on a flatcar of a train travelling along a straight horizontal track at a constant speed of 10.0 m/s.The student throws a ball into the air along a path that he judges to make an initial angle of 60.0 degrees with the horizontal

    asked by Sammie on February 17, 2013
  87. RE: PHYSICS

    A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to

    asked by COFFEE on February 26, 2007
  88. physics

    a ball is dropped from a point heiht above the ground.on striking the ball it rebounds with a small speed as it strikes with the ground and would hence come up to same height from were it was dropped and motion remained infinetly?draw x-t gaphs?

    asked by lalita on May 6, 2013
  89. 7th grade language arts Ms. Sue please

    4. In the phrase, "the grim-faced Yankee principal," how is the word "Yankee" an example of semantic slanting? (1 point) It is used with a negative connotation. It is an exaggeration. It presents a vivid image. Is the answer: It is used with a negative

    asked by Delilah on January 2, 2013
  90. physics

    A 4.10 kg object on a horizontal frictionless surface is attached to a spring with spring constant 840 N/m. The object is displaced from equilibrium 50.0 cm horizontally (in the + direction) and given an initial velocity of 9.9 m/s back toward the

    asked by Anonymous on September 7, 2013
  91. Structural Steelwork

    A workshop table has an equilateral triangular top, each side of which is 900mm, the legs being at the three corners. A load of 500N is placed on the table at a point distant 325mm from one leg and 625mm from another. What is the load on each of the three

    asked by David on December 21, 2016
  92. physics

    A basketball player throws the ball at a 53degree angle above the horizontal to a hoop which is located a horizontal distance L = 2.4 m from the point of release and at a height h = 0.9 m above it.What is the required speed if the basketball is to reach

    asked by karine on September 27, 2014
  93. chemistry

    The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees celcius is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees celcius. Calculate its molar heat of vaporization (in kJ/mol).

    asked by jack on January 31, 2010
  94. grade 7 math

    Uniform Motion Related Problem Two cars starting from the same point travel in opposite directions. Car A travels at 80 kph and car B at 110 kph. After how many hours will the cars be 760 km apart?

    asked by Krystal on January 19, 2015
  95. algebra

    A motorboat can maintain a constant speed of 24 mph relative to the water. The boat makes a trip upstream to a certain point in 62 minutes. the return trip takes 34 minutes. What is the speed of the current?

    asked by Wen on September 20, 2011
  96. Physics

    A ball is dropped from a height of 20 m. You can use the relation between the work done by gravity and the change in the ball's kinetic energy to determine the speed of the ball at any point in its free fall. The speed of the ball when it hits the ground =

    asked by Jennifer Tailbow on February 4, 2014
  97. Physics

    A ball is thrown at 41° below the horizontal from a rooftop of height 65 m. It lands 2 s later. Find: Find: a) its initial speed b) the point of impact with the ground; m from the base of the building c) the angle at which it hits the ground. ° below the

    asked by Vivian on September 28, 2014
  98. chemistry

    describe the predominant forces that exist between molecules of the noble gases. Arrange the noble gases in a predicted order of increasing boiling point (lowest first) and explain the reason for the order

    asked by jamie on February 16, 2015
  99. Mathematics

    The difference between the x-coordinates of two points on the parabola y^2=4ax is fixed at 2k. Find the equation that describes the position(xp, py)of the point of intersection P of the tangents at the two points. The equation is in the form yp^2=f(xp).

    asked by Louis on December 18, 2010
  100. Physics

    A circular dam has a radius of 10.0 m and a height of 3.0 m. Of the dam will be filled with water from a pipe with an inside diameter of 10 cm and a water flow of 10 litres per second, calculate the time taken to fill the dam to a point 10 cm from the top

    asked by Basil on April 4, 2016

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