Question

1. An ingot is made out unknown quantities of copper (9000 kg/m2) and iron (8000 kg/m). The ingot's weight in air is 82 lbs. If weighed in water, it is only 72 lbs. Find the fraction of its total volume that is iron, assuming the alloy conserves volume during formation. 2. Find the angular acceleration of a 0.3 kg solid sphere with a h-meter radius on a central, vertica axis when a constant force of 12 N is applied 30° sideways from straight out of the sphere's surface at its equator. 3. Find the efficiency of the engine cycle shown T (K) 750 600 450 300 150 sa/k) 0 2 468 10 12 14

do #s 1-3 and show all the work and steps and show final answer.

Answer 1

et to tol Natume and Nalume_-of-copper enl 8000 kg/m atRY

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