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A 0.700-kg ball is on the end of a rope that is 2.50 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical as shown. What is the tangential speed of the ball?
A crate of mass 150.0 kg lies at rest on a horizontal storage room floor. The coefficient of static friction between crate and floor is 0.72, and the coefficient of kinetic friction is 0.85. (You may suppose g = 10.0m/s2).
A 1250 kg car is moving at 23.2 m/s. Then, 323 kJ of work is done on the car to increase its speed. What will be the car's new speed
A 300-g mass at the end of a Hookean spring vibrates up and down in such a way that it is 2.0 cm above the tabletop at its lowest point and 16 cm above its highest point, Determine the amplitude of vibration
A volleyball is spiked so that its incoming velocity of +4.2 m/s is changed to an outgoing velocity of -24 m/s. What impulse does the player apply to the ball
A 25 horsepower motor consumes 21 kW of electricity, Calculate the heat loss of the motor (kW) and Calculate the efficiency of the motor
A rectangle with a length L, and width L/2 has a surface charge density of 3.1mC/m^2. Determine the integral that would give you the electric field at a height h above the middle of the long edge.
A storage tank 27 m high is filled with pure water, Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
Consider the motion of a muon as it moves through the Earth's atmosphere. After a time ? = 2.20 multiply.gif 10-6 s, What is the speed of the muon
A student holds a laser that emits light of wavelength 633nm. The beam passes through a pair of slits separated by 0.3mm, Find the speed of the first-order maxima on the screen
Determine how long it would take an astronaut to fall from a height of 2 meters on the Moon. Compare this time to the time it would take the astronaut to fall the same 2 meters on the Earth. Also, compare the time to the time it would take on the ..
What is an approximate absorbed dose rate in Gy per day in water at the center of the bucket if 163 atoms of Cs-137 disintegrate per g s? Use the straight-ahead approximation and mean-radius method of calculating the photon dose. Give the answers for..
A 150? resistor is across a 24.0V battery. Find the energy supplied by the battery in 4min
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