A ballerina spins initially at 1.5 revolutions/second when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg-m2 and her angular speed increases to 4.0 rev/s

Determine her initial moment of inertia.


2.3 kg ? m2

Physics & Space Science

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If you throw a ball straight downward (in the absence of air resistance), after leaving your hand its acceleration is

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A system has a heat source supplying heat to an ideal gas at a rate of 187.0 W and the gas is doing work at a rate of 130.9 W. At what rate is the internal (thermal) energy of the gas changing?

A) 56.1 W B) 318 W C) -56.1 W D) 187 W

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How tightly the nucleons in a nucleus are bound together is indicated by the nucleus's __________

Fill in the blank(s) with correct word

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