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A playground merry-go-round has a radius of 4.20 and a moment of inertia of 255 and turns with negligible friction about a vertical axle through its center. What is the work done by the child? Show equations used.
when 105 mL of water at 22 C is mixed with 68mL of water at 95 C, what is the final temperature? suppose no heat is lost to the surroundings and density of water is 1 g/mL.
A size-5 soccer ball of diameter 22.6 and mass 426 rolls up a hill without slipping, reaching a maximum height of 3.50 above the base of the hill. How much rotational kinetic energy did it then have
The period of motion of an object-spring system is T = 0.546 s when an object of mass m = 254 g is attached to the spring, Find the frequency of motion in hertz
For a particular RLC series circuit, the capacitive reactance is 9.75 ?, the inductive reactance is 42.7 ?, What is the maximum voltage across the circuit?
A rigid tank contains 1.50 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.4 atm to 4.30 atm
Visible light passes through a diffraction grating that has 900 slits per centimeter, What is the difference between these wavelengths
A student throws a baseball at a large gong 61 m away and hears the sound of the gong 1.5404 s later. The speed of sound in air is 330 m/s. What was the average speed of the baseball on its way to the gong
An air bubble has a volume of 1.60 cm3 when it is released by a submarine 110 m below the surface of a lake. What is the volume of the bubble when it reaches the surface
A skier of mass 71.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull him a distance of 57.5 m up a 31.0° slope (assumed frictionless) at a constant speed of 2.20 m/s
A certain medical machine emits x-rays with a minimum wavelength of 0.025 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 80 percent of its normal value. Now what is the minimum x-ray wavel..
A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. What is the angular acceleration of the wheels
Due to the wave nature of light, light shined on a single slit will produce a diffraction pattern, What is the width of the first order fringe
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