Physics, 23.10.2020 08:01 pettismayersjoy3le8
Sphere A has a mass of 4.2 x 10-2 kg and is
tethered to a wall by a thin thread. Sphere A has an
excess of 1.2 x 1012 electrons. Sphere B has a deficit
of 3.5 x 1012 electrons and is 0.23 m from sphere A.
Determine the angle between the thread and
the wall.
Answers: 2
Physics, 21.06.2019 23:00, hunterdylan01
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?
Answers: 1
Physics, 22.06.2019 15:30, sandra5456
An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?
Answers: 1
Sphere A has a mass of 4.2 x 10-2 kg and is
tethered to a wall by a thin thread. Sphere A has an
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