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One of the most efficient engines ever built is a coal-fired steam turbine in the Ohio valley, driving an electric generator as it operates between 430°C and 1870°C.
(a) Evaluate its maximum theoretical efficiency?
%
(b) Its actual efficiency is 42.0 percent. Compute how much mechanical power does the engine deliver if it absorbs 1.30 105 Joule of energy each sec from the hot reservoir?
kW
A model rocket fired vertically from the ground ascends with avertical acceleration of 3.2m/s2 for 6.0 s. Its fuel isthen exhausted, so it continues upward as a free-fall particle andthen falls back down.
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