Which best describes why heat pumps are reversible?
They can heat and cool an indoor space.
T...
Physics, 13.10.2020 15:01 cyberdac01
Which best describes why heat pumps are reversible?
They can heat and cool an indoor space.
They involve a metal expanding or contracting against another.
They combust and can also add coolant.
They allow a piston to move up and down.
Answers: 3
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Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100Β°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.
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Answers: 1
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Answers: 1
Physics, 22.06.2019 23:00
Awelder using a tank of volume 7.50Γ10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30Γ10^5 pa and temperature of 37.1 βc. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 βc, the gauge pressure of the oxygen in the tank is 2.00Γ10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.
Answers: 3
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