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Find one light and one heavy book. Put one of them at the edge of the table and use one hand to gently push it over the edge. Catch it with the other hand about 1 ft=30 cm below the edge of the table. Then do the same with the other book. (Don't choose a book so heavy that it'll hurt your hand, or so valuable that you'll be afraid to damage it!) Compare how much of a " push" your receiving hand feels from the heavy book and from the light book. Explain the difference. [Hint: are the books falling at the same speed at the moment they hit your hand?]
A uniform solid disk has a radius of R = 0.46 m and mass of M = 4.9 kg and is free to rotate about an axis through its center of mass. How many revolutions has the disk made at t = 10.4 seconds
a container is filled to a depth of 20.0 cm with water. on top of the water floats a 35.0 cm thick layer of oil with
The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s.
Electrons are emitted when a metal is illuminated by light with a wavelength less than 381nm but for no greater wavelength. What is the metal's work function?
Two masses, M=3.8kg and m=2kg, are hung over a massless, frictionless pulley. What is the downward acceleration of mass M
A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 125 rpm about a vertical axis, as we showed in Fig.11.8.
The space between two concentric conducting spherical shells of radii b = 1.70 cm and a = 1.20 cm is filled witha substance of dielectric constant κ = 20.8. A potential difference V = 15.0 V is applied across the inner andouter shells.
A major-league pitcher can throw a baseball in excess of 41.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 18 m away from the point of release.
Consider a uniform electric field E=2kN/Ci. Find the flux of this field through a square of side 10 centimeter in a plane parallel to the yz plane
A horizontal force of with a magnitude of F = 220 N is applied to block 1, What is the magnitude of the net force on the middle block
A train moving with constant velocity travels 190mnorth in 11s and an undetermined distance to the west. The speed of the train is 33m/s. How far west has the train traveled in this time
A device has a 100 g wooden shuttle that is pulled horizontally along a square frictionless wooden rail by an elastic band. find the magnitude of the initial acceleration of the shuttle
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