Physics, 11.10.2019 15:10 poptropic7623
Which of the following is an example of a force?
a) push
b) pull
c) inertia
d) both a and b
e) all of the above
Answers: 3
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?
Answers: 1
Physics, 22.06.2019 06:10
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.
Answers: 3
Physics, 22.06.2019 12:30
Which levels of government establish and implement educational requirements for minors
Answers: 1
Physics, 22.06.2019 13:20
Arrange the images in order to show how lake-effect snow occurs.
Answers: 2
Which of the following is an example of a force?
a) push
b) pull
c) inerti...
a) push
b) pull
c) inerti...
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