how could you measure the amount of elastic potential energy in a streched rubber band? think about the definition of energy whe
1 answer:
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125 W is the power output of this machine.
Answer:
Explanation:
Power is defined as the amount of work done on the system to move that system from its original state within the given time interval. So it can be determined by the ratio of work done with time interval. As work done is the measure of force required to move a system to a certain distance. Work done is calculated as product of force with displacement.
So in the present case, the force is given as 100 N, the displacement is given as 5 m and the time is given as 4 s, then power is
As Work done = Force acting on the machine × Displacement
So
Power = =125 W
So, 125 W is the power output of this machine.
Answer:
The water would have a change in the energy of 50 BTU
Explanation:
- Under the assumption that the piston-cylinder system is a closed system, then the conservation law of the system would be:
, where
is all the energy that goes into the system,
is all the energy that leaves the system and,
is the change of the energy of the system.
- For this case the energy that is feeded to the system is heat: 63 BTU.
- There is two ways that energy is leaving this system: 8 BTU of heat as losses through the side walls and, 5 BTU of work done by the vapor on the piston.
- Then the change of energy of the system is:
.