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A 5.60kg mass is pushed against a spring (k=2000N/m) such that the spring is compressed 12 cm. The mass is released, slides 1.50m down the incline, along which μ=0.140. Decide the kinetic energy as it reaches level ground.
A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.75 of her regular weight. Calclate the acceleration of the elevator
A runner approaching the start/finish line hears the bell signaling one lap to go. The bell emits a 352 Hz tone, How fast is she going
How fast is the center of mass of the two-stone system. A worker stands still on a roof sloped at an angle of 28° above the horizontal. He is prevented from slipping by a static frictional force of 470 N. Find out the mass of the worker.
At a distance of 6.0 km from a radio transmitter, the amplitude of the oscillating electric field of the radio wave is Eo=.13 V/in, What is the time-averaged energy flux
two long parallel wires whose centers are 21.0 cm apart are part of the same circuit. each wire carries equal currents
A 1.9-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
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
The Yerkes telescope in southern Wisconsin is the largest refracting telescope in the world. Its objective lens is 40 inches (slightly over a meter) in diameter. What are the focal lengths of the two lenses
A 1.05 kg mass is attached to a light cord that is wrapped around a pulley of radius 2.65 cm, which turns with negligible friction. Find the moment of inertia of the pulley
Suppose that when a certain sound intensity level (in dB) quadruples, the sound intensity (in W/m2) doubles. Determine this sound intensity level
ball a is dropped from the top of a building of height h at the same instant that ball b is thrown vertically upward
A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 26.3°. Find the dispersion of the slab
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