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When the power is turned off on a turntable spinning at 90.0 rpm , you find that it takes 11.8 revolutions for it to stop while slowing down at a uniform rate. A) What is the angular acceleration (in rad/s^2), of this turntable? B) How long does it take to stop after the power is turned off?
The linear acceleration of the center of mass of a yo-yo is 2.0m/s^2 as it rolls by gravity down its string. what is its rotational inertia
An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
A mirror is to be used to project a 2.00 tall image on a screen which is 4.70 from the mirror. What magnification is necessary to accomplish this task
0.97 L of 16C water is placed in a refrigerator. What is the refrigerator's coefficient of performance
At what temperature is the root-mean-square speed of nitrogen molecules equal to the root-mean-square speed of hydrogen molecules at 15.0°C? (Hint: The molar mass of Hydrogen is 1.008g/mol and the molar mass of Nitrogen is 14.007 g/mol) of each eleme..
A child exerts a tangential 47.6 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.10 {m}. If merry-go-round starts at rest and acquires the angular speed of 0.080 {rev/s} in 3 {s}, what is its mass.
A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of the very large accelerations. What is the acceleration at the end of a test tube that is 10 cm from the axis of rotation
He wants to row directly across a river 252 wide with a constant of 1.33 m/s. Illustrate what direction should he aim his boat, and low long will it take him to cross the river
Conservation of energy tells us that energy cannot be created or destroyed. Clearly energy is required for radioactivity to occur. a. Where exactly is this energy coming from? b. How could the age of this fragment be determined?
Consider again the long wire near a small wire rectangle. The long wire is part of a circuit. The circuit is small enough that all the approximations we've used in class are good, but the wire near the rectangle is much longer than the rectangle. ..
Atmospheric pressure is about 1.0 105 Pa on average. What is the downward force of the air on a desktop with surface area 0.1 m2
While a hybrid car brakes to come to a stop at a traffic light, describe the energy transfer and materials used to transfer of this energy
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