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In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion. Assume that the ball hits the wall at a velocity of 20m/s and bounces back with a velocity of 12m/s , and that the kinetic energy lost in the process heats the ball. What will be the temperature increase of the ball after one bounce? (The specific heat of rubber is about 1200 J/Kg C)
How much mass is converted to energy in H fusion and What do exoplanets (especially Hot Jupiters) tell us about planet behavior!
A coil is placed in a changing magnetic field and an emf is induced. What happens to induced emf if the rate of change of magnetic field quadruples.
Suppose the horizontal velocity of the wind against a sail is 5.5 m/s parallel to its front surface and 3.3 m/s along its back surface. Calculate the approximate force on a square meter of sail in N
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
However, the current increases by just 0.11 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.
Charge of uniform density (80 nC/m^3) is distributed throughout a hollow cylinder region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry..
imagine a linebacker collides with a stationary quarterback and they become entangled. what will happen to the velocity of the linebacker-quarterback system if momentum is conserved.
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest, Find the average induced emf in the coil during this time. Assume the magnitude of the Earth's magnetic field is 26.9
An archer pulls her bowstring back 0.432 m by exerting a force that increases uniformly from zero to 227 N. What is the equivalent spring constant of the bow
The escape velocity of a bullet from the surface of planet Y is 1951 m/s. Calculate the escape velocity from the surface of planet X
What is the net upward force on an airplane wing of area 27.8 m2 if the speed of air flow is 242 m/s across the top of the wing
If a spaceship is approaching the earth at 0.24c, what is the speed of the capsule relative to the ship
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