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Physics, 21.06.2019 19:10
Natural forces that can alter ecosystems include seasons and climate changes. t or f
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Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
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Physics, 22.06.2019 13:00
Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg
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Agirl uses a skateboard to travel 65 meters in 25 seconds. what is her average speed?...
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