Determinați numărul protonilor și cel al neutronilor în nucleul atomului
de beriliu .
De...
Physics, 07.05.2020 12:57 blondieb1722
Determinați numărul protonilor și cel al neutronilor în nucleul atomului
de beriliu .
Determinaţi structura nucleelor izotopilor de uraniu și de toriu Care forţe se numesc forţe nucleare. Enumeraţi particularităţile forţelor nucleare
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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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