1. science 275

    why conserving energy is important?

    asked by sam on June 14, 2009
  2. Science

    What is an energy production pyramid??

    asked by Elizabeth on September 9, 2009
  3. Physics

    Why are w=fxd and E =mc2 both energy

    asked by Mileena on April 12, 2017
  4. Physics

    Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive

    asked by Tristan on September 24, 2008
  5. college-Physics

    Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive

    asked by Tristan on September 24, 2008
  6. physics

    Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive

    asked by Tristan on September 24, 2008
  7. math

    Three forces act on a hockey pick as it slides across the ice; the normal force N represents the force the ice exerts upward on the puck and is given by N= , the gravitational force G represents the downward force of gravity on the puck and is given by G =

    asked by Ryan on May 6, 2013
  8. physics

    In the figure below, m1 = 9.5 kg and m2 = 4.0 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30.

    asked by sandy on October 30, 2011
  9. physics

    A 30 kg block slides down a 20° ramp with an acceleration of 1.2 m/s2. What is the coefficient of kinetic friction between the block and the ramp?

    asked by HASANNY on October 30, 2010
  10. Physics

    A 4-kilogram mass has a speed of 6 m/s on a horizontal frictionless surface. The mass collides head-on and elastically with an identical 4-kilogram mass initially at rest. The second 4-kilogram mass then collides head-on and sticks to a third 4-kilogram

    asked by Hannah on January 17, 2008
  11. 7th grade math

    Can you check these? 1. Jonelle is running on a track that is 2/3 of a mile long. So far she has run 4/5 of the way around the whole trace. How far has she run so far? Ans: (2/3)(4/5) =8/15 mile 2. A recipe for muffins needs 3/4 of a cup of milk. You are

    asked by Alexis on March 25, 2015
  12. biology

    which of these would lead to an increase in carbon dioxide in the atmosphere a- decrease in animal respiration b- decrease in plant respiration c- an increase in photosynthesis d- an increase in auto and factory emissions 2. which activity occurs during

    asked by anonymous on December 23, 2013
  13. physics

    A 1.5 kg snowball is fired from a cliff 12.5m high with an inital velocity of 14 m/s directed 41 degrees above the horizontal. a) how much work is done on the snowball by the gravitaitonal force during its flight to the flat ground below the cliff? b) what

    asked by Jamie on January 4, 2007
  14. chemistry

    The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 ∘C. The specific heats of C2Cl3F3(l) and C2Cl3F3(g) are 0.91 J/g⋅K and 0.67 J/g⋅K, respectively. The heat of vaporization for the compound is 27.49 kJ/mol. Calculate the heat

    asked by Tori on February 2, 2015
  15. Physics

    An object of mass 1.4kg is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 36 rpm is reached, at which point the object

    asked by Chelsey on October 5, 2012
  16. Physics

    A train 500 m long is moving on a straight track with a speed of 84.2 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.4 km/h. Assuming constant acceleration, determine how long the train

    asked by Bob on March 5, 2014
  17. Physics

    An object of mass 1.4kg is placed 11.5 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 37 rpm is reached, at which point the object

    asked by John on October 10, 2011
  18. physics

    A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train

    asked by sally on February 3, 2012
  19. physics

    A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train

    asked by sally on February 3, 2012
  20. trig

    A plane has an airspeed of 190 miles per hour and a heading of 24.0°. The ground speed of the plane is 214 miles per hour, and its true course is in the direction of 40.0°. Find the speed and direction of the air currents, assuming they are constants.

    asked by janice on November 16, 2012
  21. physics need help anybody

    The equation y=As in(wt-kx)represents a plane wave traveling along the x-direction. If a=0.10m, w=8500hz and k=25/secs......Calculate the speed of the Waves -Calculate the speed of the medium through which the wave is travelingl -What is the equation of

    asked by .... on November 22, 2016
  22. sir damon i need u help physics

    The equation y=As in(wt-kx)represents a plane wave traveling along the x-direction. If a=0.10m, w=8500hz and k=25/secs......Calculate the speed of the Waves -Calculate the speed of the medium through which the wave is travelingl -What is the equation of

    asked by .... on November 22, 2016
  23. Physics

    a) Give the equation for terminal speed in the variables from Stoke's Law, and the densities of the sphere Ps and the fluid P1. b) Find the viscosity of motor oil (in kg/m/s) in which a steel ball of radius 0.85mm falls with a terminal speed of 4.32cm/s.

    asked by Meg on November 1, 2017
  24. physics

    a 2000kg car travelling west with a speed of 20m/s collides at an intersection with a 3000kg car travelling south at a speed of 20m/s. find the direction and magnitude of the velocity of the wreckage after the collision, assuming the collision was

    asked by Mostafa on July 7, 2015
  25. physics

    A 3.49 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-seventh the original speed of the 3.49 mud ball. What is the mass of the second mud ball?

    asked by Amy on February 28, 2015
  26. physics

    A stationary motion detector sends sound waves of frequency 0.0953 MHz toward a truck approaching at a speed of 42.6 m/s. What is the frequency of the waves reflected back to the detector? (Take the speed of sound to be 343 m/s.)

    asked by Anonymous on June 5, 2015
  27. physics

    a person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 18 ms. The cliff is 52m above the waters surface. How long does it take for the stone to fall to the water? With what speed does it strike the water?

    asked by Andrea on January 14, 2010
  28. Physics

    A 20kg box rests on a rough floor. It takes a horizontal force of 40 N to keep the box sliding at a steady speed. Suppose a force of 100 N is applied to the box. What speed would thr box have after sliding for 3.0m?

    asked by Nita on October 15, 2010
  29. physics

    A Ferris wheel rotates at an angular velocity of 0.29 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.039 rad/s2. How long does it take the wheel to come up to operating speed?

    asked by vik on October 22, 2014
  30. physics

    A lift starts from the top of a mine shaft and descends with a constant speed of 10 m/s. 4 s later a boy throws a stone vertically upwards from the top of the shaft with a speed of 30 m/s. Find when and where stone hits the lift [take: g=10 m/s²]

    asked by karan on July 17, 2014
  31. physics

    A Ferris wheel rotates at an angular velocity of 0.20 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.029 rad/s2. How long does it take the wheel to come up to operating speed?

    asked by michelle on November 15, 2010
  32. calculus

    A golf ball of mass 0.05 kg is struck by a golf club of mass m kg with a speed of 50m/s will have an initial speed of v(m)=83m/(m+0.05) m/s. show that v'(m)>0 and interpret this result in context with the application. Compare v'(0.15) and v'(0.20) in

    asked by Corey on September 27, 2012
  33. science

    A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Neglecting air friction,

    asked by Anonymous on January 9, 2013
  34. physics

    A body of mass 5kg moving with a speed of 3m/s collides head on with a body of mass 3kg moving in the opposite direction at speed of 2m/s The first body stops after the collision The final velocity of the second body is Ans:3m/s

    asked by Thousif on August 21, 2017
  35. physics

    A 0.160 kg glider is moving to the right with a speed of 0.9 m/s on a frictionless horizontal air track. The glider has a collision with a 0.291 kg glider that is moving to the left with a speed of 2.27 m/s. Find the final velocity of each glider if the

    asked by anonymous on October 9, 2018
  36. Physics

    A 3.32 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-eighth the original speed of the 3.32 mud ball. What is the mass of the second mud ball?

    asked by Anonymous on December 12, 2014
  37. physic

    a skater with moment of inertia 15 kgm2 begins a spin with an angular speed of 6.0 rad/s by changing the position of her arms, the skater decreases her moment of inertia by 50% what is the skaters final angular speed

    asked by amro on November 7, 2016
  38. physics

    Anne throws a ball straight up releasing it from her hand with an initial speed of 20 m/s. The ball is at a height of 1.5 m above the ground when it is released. Determine the maximum height of the ball? Calculate the ball’s speed just before it hits the

    asked by bobby on August 26, 2012
  39. Physics

    You encounter a moving walkway that is 97 m long and has a speed of 2.0 m/s relative to the ground. How long would it take you to cover the 97 m length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the

    asked by Jan on February 4, 2012
  40. Physics

    A 3.20 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-half the original speed of the 3.20 mud ball. What is the mass of the second mud ball? kg

    asked by Anonymous on October 30, 2014
  41. physics

    A Ferris wheel rotates at an angular velocity of 0.28 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.021 rad/s2. How long does it take the wheel to come up to operating speed?

    asked by gregory on July 16, 2013
  42. Physics

    A 3.20 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-half the original speed of the 3.20 mud ball. What is the mass of the second mud ball? kg

    asked by Karrie on October 29, 2014
  43. Math

    At 10:00 AM a truck started traveling from point A with a speed of 40mph. 3 hours and 10 minutes later a car started to drive from point A in the same direction with an average speed of 60mph. At what time will the car catch up with the truck?

    asked by Ella on May 15, 2019
  44. maths

    A boat takes 2 hours to go 40km down the stream and it returns in 4 hours. Find the speed of the boat in still water and the speed of the stream

    asked by manavi on July 18, 2015
  45. Physics

    A block is sent sliding down a frictionless ramp. Its speeds at points A and B are 2.30 m/s and 3.00 m/s, respectively. Next, it is again sent sliding down the ramp, but this time its speed at point A is 4.50 m/s. What then is its speed at point B?

    asked by Trish on October 2, 2011
  46. Pre Calc

    Airplane going N 60 degrees W at a speed of 400 mph. What wind direction, at a speed of 75 mph will produce a resultant direction of N 50 degrees W

    asked by Beth on June 7, 2016
  47. Physics

    A 395cm oscillator has a speed of 104.5cm/s when its displacement is 2.80cm and 74.5cm/s when its displacement is 6.60cm. What is the oscillator's maximum speed?

    asked by Dan on April 24, 2011
  48. Math

    A bicycle's wheels are 30 inches in diameter. Assuming that the angular speed of the wheels is 11 radians per second, find the speed of the bicycle in inches per second.

    asked by Rafael L. on June 26, 2016
  49. maths

     A boat goes 12 km upstream and 40 km downstream in 8 hours. It can go 16 km upstream and 32 km downstream is the same time. Find the speed of the boat in still water and the speed of the stream.

    asked by raghav on June 4, 2014
  50. Math

    A car traveling from town A to town B at an average speed of 80 km/h took 54 minutes. Another car took 40 minutes to travel the same distance. What was the difference in their speed in km/h?

    asked by k on May 6, 2018
  51. Physics

    it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?

    asked by JuJu on January 31, 2011
  52. Chemistry

    How does the presence of sodium chloride and acidic substances increase the speed of rusting? Will alkaline substances increase the speed of rusting?

    asked by janice on February 1, 2009
  53. maths

    A motorist travels a certain distance x in five hours at an average speed of 90km/h.what average speed must she maintain to cover the distance in 4 hours?

    asked by dimpho on August 25, 2015
  54. Math

    Patrick drove 3 hours to attend a meeting. on the return trip, his speed was 10 mi/h less, and the trip took 4 hours. a) what was his speed each way? b) what is the distance he drove one way?

    asked by Evelyn on September 30, 2013
  55. algebra

    Traveling downstream a certain boat went 21 mph. Traveling upstream it went only 5 mph. Find the speed of the boat in still water and the speed of the current.

    asked by james on December 18, 2014
  56. Physics

    A 492g oscillator has a speed of 99.5cm/s when its displacement is 3.60cm and 72.5cm/s when its displacement is 5.10cm . What is the oscillator's maximum speed? (units cm/s)

    asked by Amy on January 8, 2013
  57. English

    1. He was driving at 70 km an hour. 2. He was driving at 50 miles an hour. 3. He was driving at low speed. 4. He was driving at full speed. (Are they all grammatical? Do you have some other expressions about "at _____"?

    asked by rfvv on April 16, 2016
  58. Physics

    it says create a graph from our data. rotational speed vs force. i know that independent variable goes on the x axis. but out of rotational speed and force which goes on the x axis and which goes on the y?

    asked by JuJu on January 31, 2011
  59. Science

    A______________________ is a tool used to capture the energy in sunlight. Recycling aluminum cans and taking shorter showers are two ways to practice the ________________________ of natural resources. Some plastics are made from corn. These plastics are

    asked by Anonymous on April 1, 2014
  60. PHYSICS

    Q1= An 85 cu.meter room. - How much energy required to heat room temperature from 5C to 22C. - How long in minutes Q2= - a 40 Liter radiator in the same room above. energy input is 5400 watts. In order to increase room temperature from 5C to 22C, how long

    asked by M BIL on May 31, 2012
  61. Physics HELP!!!!!!!!

    For the normal force in Figure 5.21 to have the same magnitude at all points on the vertical track, the stunt driver must adjust the speed to be different at different points. Suppose, for example, that the track has a radius of 3.1 m and that the driver

    asked by Mary on February 21, 2007
  62. chemistry

    A proposed mechanism for a reaction is: (i) A + B2 AB2 Ea1 = 12 kJ/mol ƒ´H1 = 3 kJ/mol (ii) AB2 + C2 ABC + BC Ea2 = 30 kJ/mol ƒ´H2 = 5.2 kJ/mol (iii) ABC + B2 AB2 + BC Ea3 = 10 kJ/mol ƒ´H3 = -7.8 kJ/mol a) Which is the rate determining step? Explain

    asked by Sarah on September 20, 2014
  63. Spanish (Sra)

    Can someone check my work? English: My cousin came over to play. We were running around the living room. My brother and cousin crashed into each other. And my brother cut the corner of his eye open. Spanish: My primo vino a jugar, Nosotros estábamos

    asked by Larry on October 8, 2009
  64. algebra

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

    asked by alyssa on March 3, 2012
  65. math

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

    asked by alyssa on March 3, 2012
  66. math

    Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the

    asked by krysta on March 1, 2012
  67. physics-rotational dynamics

    Two astronauts, each having a mass of 75.0 kg, are connected by a 10.0 m rope of negligible mass. THey are isolated in space,orbiting their center of mass at speeds of 5.00 m/s. calculate A)magnitude of the angular momentum of the system by treating

    asked by cyndi on February 12, 2007
  68. physics

    A typical problem in physics is that physical quantities can be calculated for a series of finite systems, but ultimately, we would like to know the results for the infinite system. Hulthen (1938) studied the one-dimensional Spin Heisenberg model with

    asked by Kedir on November 2, 2018
  69. Chem II

    The conversion of glucose into lactic acid drives the phosphorylation of 2 moles of ADP to ATP and has a standard free energy of -135 kJ/mol. C6H12O6 + 2 HPO4 + 2 ADP + 2 H+ --> 2CH3CH(OH)COOH + 2 ATP + 2H20 What is the standard free energy for the

    asked by Nicole on April 7, 2015
  70. physics

    in a game of billiard , a collision occurs between two marble balls of different mass. one ball 400g is initially at rest. After the collision, this ball acquires a velocity of 1.40m/s at an angle of 37 degrees from the original direction of the motion of

    asked by Zobia on March 21, 2015
  71. Physics

    The speed limit in a school zone is 40km/h. A driver traveling at this speed sees a child run into the road 13m ahead of his car. He applies the breaks, and the car decelerates at uniform rate of 0.8m/s². If the driver's reaction times is 0.25s, will the

    asked by Majiri on February 2, 2018
  72. math

    A woman throws a cricket ball upwards into the air. The ball leaves the womans hand at 1.8m above the ground at speed of 9.7. It rises and then falls back to the ground. Considering the energies involved calculate the speed at the point it hits the ground.

    asked by joleen on December 15, 2010
  73. Physics

    Kenya finally loses her cool and punches her teacher. The teacher weighs 85 kg. He sees the punch coming and begins to back up at a speed of 0.60 m/s. After Kenya clocks him, he is moving backwards at a speed of 0.82 m/s. If the contact time of Kenya's

    asked by Becky on March 21, 2012
  74. Physics

    We commonly see Superman being shot and bullets bounce off of him. Suppose Mr. Bad shoots Superman with 4.00 kg bullets at a rate of 100 bullets/min for 9.00 s. If the speed of each bullet is 480.00 m/s and rebounds straight back with no change in speed,

    asked by Anonymous on July 22, 2015
  75. Science/Math

    John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a speed of 4.2 m/s until the last 200 m, which he covers at 4.5 m/s. At what average speed must Al run to beat John? The textbook that included the

    asked by Walter on September 30, 2013
  76. physics

    A solid, horizontal cylinder of mass 12.0 kg and radius 2.30 m rotates with an angular speed of 6.70 rad/s about a fixed vertical axis through its center. A 1.60 kg piece of putty is dropped vertically onto the cylinder at a point 0.600 m from the center

    asked by Anonymous on November 11, 2012
  77. Science

    Are these good scientific questions (they are written in reference to a computer simulation)? 1. How does the range of the object change as the initial speed and drag coefficient get bigger? 2. Does air resistance affect the time taken for the object to

    asked by Anonymous on October 6, 2016
  78. Physics

    At the entrance channel of a harbor, the tidal current has a velocity of 4.94 km/hr in a direction 23.2° south of east. Suppose a ship caught in this current has a speed of 15.6 km/hr relative to the water. If the helmsman keeps the bow of the ship aimed

    asked by Lindsay on October 18, 2007
  79. Physics

    A 65-kg astronaut pushes against the inside back wall of a 2000kg spaceship and moves toward the front. Her speed increases from 0 to 1.6 m/s If her push lasta 0.3 seconds what is the average force that the astronaut exerts on the wall of the spaceship??

    asked by Hang on November 13, 2016
  80. Physics HELP!

    A solid, horizontal cylinder of mass 11.0 kg and radius 1.70 m rotates with an angular speed of 5.10 rad/s about a fixed vertical axis through its center. A 1.21 kg piece of putty is dropped vertically onto the cylinder at a point 0.600 m from the center

    asked by Mia on November 6, 2012
  81. Physics

    A turntable of radius 2m rotates freely about a fixed vertical axis. A child 19 kg is standing on the turntable right at the outer edge and the system is initially rotating at an angular speed of 0.5 rev/s. The child then moves to position 1m from center

    asked by Brittany on February 12, 2012
  82. chemistry

    When water is cooled to a temperature x , it gets converted into ice at temperature x by a process called p. And when ice at temperature x is warmed, it gets converted into water at the same temperature x in a process called Q a) what is the value of

    asked by rahul on June 11, 2011
  83. physics

    An electron accelerates from rest through a potential difference of 184 V. What is its final speed? An electron that has a horizontal initial speed of 4.50 106 m/s enters a region that has an electric field of 120 V/m pointing vertically upward. How long

    asked by michelle on January 12, 2011
  84. physics

    The combined mass of a race car and its driver is 600. kilograms. Traveling at a constant speed, the car completes one lap around a circular track of radius 160 meters in 36 seconds. A) Based on the given information, calculate the speed of the car. B)

    asked by Nicole on January 10, 2010
  85. Physics - HELP

    An airplane is heading due south at a speed of 515 km/h. A wind begins blowing from the southwest at a speed of 100 km/h (average). (Hint: First draw a diagram.) (a) What is the velocity (magnitude and direction) of the plane relative to the ground?

    asked by Anonymous on September 27, 2009
  86. Physics please help

    TIgers pitcher justin throws a basketball staright upward 29.0m/s. Calculate A) the height to which the ball will rise b) the time it takes to reach the highest point c) the speed with which it will return to the same height which it was thrown d) the

    asked by unknown on December 20, 2014
  87. physics

    An airplane is heading due south at a speed of 515 km/h. A wind begins blowing from the southwest at a speed of 100 km/h (average). (Hint: First draw a diagram.) (a) What is the velocity (magnitude and direction) of the plane relative to the ground?

    asked by DJ on September 26, 2009
  88. Physics

    Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find

    asked by Brittney on March 20, 2011
  89. Physics

    If motor M exerts a force of F=(10t^2+100)N on the cable, where t is in seconds, determine the velocity of the 25kg crate when t=4s. The coefficients of static and kinetic friction between the crate and the place are ÃŽ¼s=0.3 and ÃŽ¼k = 0.25,

    asked by Anonymous on November 3, 2013
  90. History

    zest n. \ˈzest\ 1. lively excitement : a feeling of enjoyment and enthusiasm; 2. a lively quality that increases enjoyment, excitement, or energy; 3. small pieces of the skin of a lemon, orange, or lime that are used to flavor food Use the dictionary

    asked by Anonymous on March 7, 2019
  91. Science

    1.What is refraction? The bending of light as it passes through matter 2.What type of lens would you use to magnify your view of a butterfly? Concave 3.What is a sound wave? Sound waves are waves of energy moving through matter.Sound waves are vibrations

    asked by Derrick on March 20, 2012
  92. physical science

    Look at the graph below measuring the speed of a truck and answer the following 2 questions: a) If the graph represents speed, what is measured on the x and y axes? You need to specifically identify which axis is which. b) Based on what the y axis

    asked by Hi on January 31, 2017
  93. physics

    Look at the graph below measuring the speed of a truck and answer the following 2 questions: a) If the graph represents speed, what is measured on the x and y axes? You need to specifically identify which axis is which. b) Based on what the y axis

    asked by hello on January 30, 2017
  94. History

    how did the end of World war 1 affect farmers in south carolina? A.the price of crops fell,so farmers no longer enjoyed the prosperity they knew during the war B.most rural farmers gained electricity and running water. C.the boll weevil appeared in

    asked by Help me,plz on March 30, 2015
  95. physics

    A runner is at the starting gate and hears the starting gun. He begins running with a constant acceleration ai = 0.55 m/s2. He crosses the finish line at d = 100 m and then begins slowing down. It takes him tr to cross the finish line. It takes him ts =

    asked by joe 10 on September 11, 2014
  96. Calculus

    The total worldwide box-office receipts for a long-running movie are approximated by the following function where T(x) is measured in millions of dollars and x is the number of years since the movie's release. T(x) = (120x^2)/(x^2 + 4) How fast are the

    asked by Mike on June 13, 2013
  97. Math

    10×3/5 A. 12 B. 5 C. 6*** D.8 1/5×8? A. 5/8 B. 1 2/5 C. 1 3/5*** D. 1 4/5 Two thirds of jacks sports cards are baseball cards. if he has 93 cards, how many are baseball cards? A. 186 B. 140 C. 62**** D. 31 4. three fifths of 30 days in June were sunny.

    asked by Beesly on January 21, 2019
  98. Physics

    1. An electric charge moves through an electric field. it accelerates, gaining 100J of energy. The change in electric potential of +10V. What is the magnitude of the charge of the particle? I did 100J/10V to get 10C. 2. If a negative charge of double the

    asked by Pat on March 19, 2018
  99. math

    A swimmer can swim a distance of 36 kilometer in the direction of water current in the same time, which he require to swim 36 kilometer in the opposite direction of water current in stream. If in still water, swimmer has speed of 12 kilometer per hour more

    asked by ramzan on April 19, 2016
  100. physics

    A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0013 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.2X10^2 ft/s,

    asked by Emily on October 17, 2012

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