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A boy on a skateboard coasts along at 6.0 m/s. He has a ball that he can throw at a speed of 10 m/s.
1) What is the ball's speed relative to the ground if he throws the ball forward?
2)What is the ball's speed relative to the ground if he throws the ball backward?
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg, Find the initial separation between the particles
Two violin strings are tuned to the same frequency, 294 Hz. The tension in one string is then decreased by 1.5 %. What will be the beat frequency heard when the two strings are played together.
A 2.96 mA beam of electrons moving at 2.09x106 m/s enters a region with a sharply defined boundary, Find the transmitted and reflected currents
The Achilles tendon is subjected to a large tension stress that results in a strain of 5%. how much does it elongate as a result of this strain
A flask is filled with 1.51 L (L = liter) of a liquid at 96.8 °C. When the liquid is cooled to 17.5 °C, What is the coefficient of volume expansion of the liquid
a solid sphere is released from rest on an incline. when it reaches the bottom what fraction of its total kinetic
A solid sphere is released from rest on an incline. When it reaches the bottom, what fraction of its total kinetic energy is rotational
To initiate a nuclear reaction, an experimental nuclear physicist wants to shoot a proton into a ^12 C nucleus. With what speed must the proton be fired toward the target
Brianne's heart is beating at 76.0 beats per minute. Calculate the frequency of her heart's oscillations in Hz
What is the speed of the two carts at the moment while their speeds are equal?
The potential at the center of a uniformly charged ring is 44kV, and 15.0 cm along the ring axis potential is 30kV. Find the ring's radius and its total charge.
A new electric power plant has an efficiency of 42%. how many are essentially lost as waste heat (in barrels of oil) to the environment
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