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In a baseball game, the catcher stops a 35 m/s pitch. How much net work is done on the baseball as it is caught? During the catch, the catcher's mitt moves back 5.0 cm and gravity does negligible work. Noting that the mass of a baseball is 145g, what average force did the mitt exert on the ball?
Two different wavelengths of monochromatic light are projected through the same double slit. First a 490 nm light is projected, calculate the unknown wavelength
A laser is mounted on a table 1.00m above the ground, pointed at a vertical mirror a horizontal distance 3.48maway. At what height does the reflected beam strike the wall
Soccer ball is kicked with a speed of 11.50 m/s at an angle of 30.0° above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air.
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
A drinking fountain shoots water out from a height of 3.5cm above its basin. Determine the time a single drop spends in the air
A 48 kg skier starts from rest at a height of H = 27 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. avoid the effects of air resistance and assume the ramp is frictionles..
A ferryboat transports tourists among three islands. It sails from the first island to the second island, 5.78 km away, Calculate the distance between the first and third islands
What is the velocity of the plank relative to the surface of ice.
An Australian emu is running due east in a straight line at a speed of 12.5 m/s and slows down to a speed of 11.4 m/s in 7.3 s. (a) What is the direction of the bird's acceleration? north south east west.
A neutron star is the remnant left after certain supernovae (explosions of giant stars). Typically, neutron stars are about 20 in diameter and have around the same mass as our sun. What is a typical neutron star density in g/cm^3?
An engineer is designing a pacemaker for cardiac patients. For the 20 year old woman, how many times must device have to beat for her to have a normal life expectancy.
He wants to row directly across a river 252 wide with a constant of 1.33 m/s. Illustrate what direction should he aim his boat, and low long will it take him to cross the river
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