Heat transfer between two substances that are in contact is called
1 answer:
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Answer:
The potential energy of an object is the energy possessed by the object due to its position in a gravitational field.
Mathematically, it is given by:
where
m is the mass of the object
g is the acceleration due to gravity at the location of the object
h is the height of the object
As we can see, the potential energy depends on the height of the object, h.
However, this height is relative, since it can be measured using different reference levels.
Generally, the reference level is taken to be the ground; so for example, an object located at the top of a cliff 40 m above the ground, has
h = 40 m
But this value is of course relative, since we can also take the reference level to be the top of the cliff, so in that case, we would have
h = 0
Explanation:
Power is defined as the rate at which work is done in per unit time.
Mathematically,
It is given that work done by engine is 4,560,000 J and time is 20 minutes.
There is 60 seconds in 1 minute. So, convert minutes into seconds as follows.
= 1200 seconds
Calculate power output of the engine as follows.
=
= 3800 J/s
or, = 3800 Watt
Therefore, the power output of the engine is 3800 Watt.