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As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 18.0 m/s. In the process, he moves his hand through a distance of 1.40 m. If the ball has a mass of 0.150 kg, find the force he exerts on the ball to give it this upward speed.
A ball is thrown horizontally from the top of a 20-m high hill. It strikes the ground at an angle of 45 degrees. With what speed was it thrown
A uniform electric field with a magnitude of 250N/C is directed in the positive x direction. A 12uC charge moves from the origin to the point (20.0 cm, 50.0 cm). what is the change in electrical potential energy of the system as a result of the ch..
a tennis ball is struck and departs from the racket horizontally with a speed of 28.4 ms. the ball hits the court at a
A certain type of pellet gun uses a spring-driven plunger to fire the BB from its barrel. What force must be exerted to compress the spring, in newtons?
A 33.7-m length of copper wire at 20.0°C has a radius of 0.23 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire
A 4.80-m clothesline is hung between two poles that are 4.76 m apart
What is the change in entropy of the air if the volume is held constant? What would the entropy change be if the pressure were maintained at 1.00 atm during the cooling?
A car traveling at 22.0 m/sundergoes a constant deceleration of 1.90 m/s2when the brakes are applied. How many revolutions does each tire make
Obtain a relation between the equilibrium lattice distance
A special kind of light bulb emits monochromatic light of wavelength 652 nm. How many photons are emitted by the bulb during its lifetime of 660 h
a refrigerator has a coefficient of performance of 3. the ice tray compartment is at -20 c and the room temperature is
Two particles with masses 3m and 5m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the particles
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