Answer:
E = 2940 J
Explanation:
It is given that,
Mass, m = 12 kg
Position at which the object is placed, h = 25 m
We need to find the potential energy of the mass. It is given by the formula as follows :
E = mgh
g is acceleration due to gravity

So, the potential energy of the mass is 2940 J.
Answer: I am not for sure
Explanation:
So they can grasp a better understanding! good luck
Answer:
the curve will flatten due to the supply and demand theory.
a) For the thermal efficiency we have

With the previously values we know that
and
(convert the min to sec)
Replacing the values

b) We use the formula of carnot efficiency

**Note that apply the formula of carnot cycle we need to consider that there is no exchange of heat, there is no friction and the reservior are completely insulated