Answer:
The thermal efficiency is 43%.
The total amount of energy developed by work is 397 kW in one year.
Explanation:
Given that,
Power output = 0.3 kW
Heat energy = 2400 Btu/h = 0.703 kW
We need to calculate the thermal efficiency
Using formula of efficiency
Put the value into the formula
The thermal efficiency is 43%.
(b). We need to calculate the total amount of energy
Using formula of energy
Hence, The thermal efficiency is 43%.
The total amount of energy developed by work is 397 kW in one year.
Answer:
2.9
Explanation:
average speed=distance/time taken
=2/5.8
=2.9
Answer:
Centre of gravity is a theoretical point in the body where the total weight of the body is thought to be concentrated. In a uniform gravitational field, the centre of gravity is identical to the centre of mass. Yet, the two points do not always coincide.
The sun's source of energy is know as nuclear fusion (means to fuse) this process has a small nuclei atoms that join together to form a large nucleus. The result of this process is released energy. The fusion of hydrogen into helium in the sun makes a large amount of energy and this is known as the sun's energy source.
The theories that scientist proposed about the source of the sun's energy was that the sun burned fuel to generate its energy and that gravity was causing the sun to shrink slowly and have its energy released. Also both of these theories were disproved.
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