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A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. the wheel is initially spinning at a rate of 85 rev/min. and the potter wants to bring it down to 45 rev/min with her hands within 15 revolutions.
A) what is moment of inertia of the disk?
B) what is angular acceleration that wil bring down the rotational speed under the states conditions?
C) what minimum total friction force must tthe potter supply to the disk if her hands are acting at the edge of the disk?
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Photographic cameras on spy satellites supposedly can read the license plate of a car on the ground. How large is the diameter of the camera required for such a feat
A tank with a volume of 0.150 m contains 27.0 degrees celcius helium gas at a pressure of 100 atm. How various balloons can be blown up if each filled balloon so a sphere 30.0 cm in diameter at 27.0 and absolute pressure of 1.20atm .
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