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A cricket bowler bowls a cricket ball witha mass of 150g and a radius of 52mm. The bowler's arm weighs 3.4kg and has a length of 0.68m. The centre of mass of the bowler's arm act's at it's midpoint. The moment of inertia of the cricket ball and bowler's arm?

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    if a piece of copper has a mass of 20g and a volume of 10mL giving a density of 2g/mL, what happens to the density when the piece of copper is cut in half?

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