Answer:
Heat pump is a device which is used to maintain the system at a temperature more than the atmospheric temperature.
<em>For example</em> if you need to maintain the system at a temperature more than the room temperature<em> (say 50° C), </em>the heat has to be supply continuously by means of supplying an external work on the system. Otherwise the heat easily escapes from the system due to temperature gradient between system and surroundings.
According to the "Thermodynamic II law, the heat always transfer from high temperature body to low temperature body without aid of external energy, but the heat can also be transfer from low temperature body to high temperature body by means of some external energy.
From given figure, To maintain the system at temperature 50° C, you need to do external work, because some energy always lost to the surroundings
Answer:
d = 11.1 m
Explanation:
Since the inclined plane is frictionless, this is just a simple application of the conservation law of energy:
Let d be the displacement along the inclined plane. Note that the height h in terms of d and the angle is as follows:
Plugging this into the energy conservation equation and cancelling m, we get
Solving for d,
Answer:
The value is
Explanation:
From the question we are told that
The operating temperature is
The emissivity is
The power rating is
Generally the area is mathematically represented as
Where is the Stefan Boltzmann constant with value
So