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A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. If the coefficients of friction are us = .6 and uk = .80 , the magnitude of the frictional force is?
find the work done on the man by the gravitational force
Compute the speed of the water just before striking the turbine blades (neglect air resistance).
A 0.140-kg baseball is dropped and reaches a speed of 1.20 m/s just before it hits the ground and bounces. What is the change of the ball's momentum during the bounce
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
An 91 kg man climbs a 981 m high mountain in 1.01 hour and uses 7.6 kcal/min, Determine the power consumption in watts.
A major league pitcher can throw a baseball in excess of 41 m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches a catcher who is 17m away from the point of release.
A spherical conducting shell has an interior radius of 18 cm and an outer radius of 21cm. The shell carries a net charge of -2.4 micro coulombs. A point charge of charge +6.4 micro coulombs is placed at the center of spherical shell.
a plucked guitar string produces a sound wave of frequency 0.44 kHz on a day when the speed of sound is 340m/s. What is the wavelength of the sound wave
Two soccer players, Mia and Alice, are running as Alice passes the ball to Mia. What is the magnitude and direction of the velocity of the ball relative to the ground
An unknown nucleus has twice the volume of a nucleus with 83 nucleons. What is the atomic mass number of the unknown nucleus
planet zero has a mass of 5.0 x 10 ^23 kg and a radius of 2.0 x 10 ^6 m. What is the speed of the probe when it is 3.0 x 10^ 6 m from zeros center
It takes 18 minutes to fill a 1.2 m3 horse trough. It is filled with water from a hose with diameter 2 cm. What is the flow rate of the water
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