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A football is kicked across a level field. The ball spends 2.36 s in the air and lands 79.8 meter from the point where it was kicked. Find what is the maximum height reached by the ball? (Neglect air resistance; g = 9.8 m/s2).
For a demonstration, a professor uses a razor blade to cut a thin slit in a piece of aluminum foil. evaluate the width of the slit
Traveling at a speed of 14.1 m/s, the driver of an car suddenly locks the wheels by slamming on the brakes. Find the speed of the automobile after 1.16 second has elapsed
A heavy stone of mass m is hung from the ceiling by a thin 8.25-g wire that is 65.0 cm long. When you gently pluck the upper end of the wire, What is the mass m of the stone
The leader of a bicycle race is traveling with a constant velocity of +11.8 m/s and is 9.20 m ahead of the second-place cyclist. How much time elapses before he catches the leader
When 4425 J of heat are added to a 0.16-m-long silver bar, What is the mass of the bar
two nanow wires are separated by 1.2 nm as measured by stm. inside the wires the potential energy is zero but between
The hydrogen atom consists of a proton of mass 1.67*10^-27Kg and an orbiting electron of mass 9.11*10^-31kg. In one of it's orbits, the electron is 5.3*10^-11m from the proton. what is the mutual attractive gravitational force between the electron..
A swimming pool has dimensions 36.0 m 8.0 m and a flat bottom. When the pool is filled to a depth of 1.90 m with fresh water, what is the force caused by the water on the bottom
generator has a terminal voltage of 115 V when it delivers 18.0 A, alculate the emf (e m f) and the internal resistance (r) of the generator
A 0.060 kg tennis ball, initially moving at a speed of 12 m/s,is truck by a racket causing it to rebound in the oppositedirection at a speed of 18 m/s. What is the change in momentum of the ball?
A step-down transformer is used for recharging the batteries of portable devices. determine the rms output voltage of the transformer
a uniform line charge that has a linear charge density 4.7 ncm is on the x axis between x 0 to x 5.0 m.a what is its
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