Determine the angular acceleration and the radial

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Q. Assuming that they have same internal energy, which will have a higher temperature: a metal knife in thermal equilibrim with a hot griddle or a 1kg block of ice at -25C or seven 12g ice cubes at -25C

Q. A 64-cm diameter wheel accelerates uniformly about its center from 130 rpm to 280 rpm in 4s. Determine the angular acceleration and the radial and tangential components of the linear acceleration of a point on the edge of the wheel 2s after it has started accelerating.

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Determine the angular acceleration and the radial : suppose that they have same internal energy, which will have a higher temperature: a metal knife in thermal equilibrim with a hot griddle or a 1kg block of ice at -25C or seven 12g ice cubes at -25C.
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