Work Energy and Power

Worked examples

Worked examples In accordance with the principle of conservation of energy, the whole of this potential energy becomes transferred to kinetic energy when the stone reaches the ground again. Hence kinetic energy on reaching the ground = 56.25 J. Answer. P.E. at greatest height During a shunting operation, a truck of total mass 15 metric tonnes (t) moving at …

Worked examples Read More »

Thermonuclear energy

Thermonuclear energy At the present time research is being carried out to investigate the possibility of obtaining energy by the fusion of hydrogen nuclei to form heavier ones. This is called a thermonuclear reaction and is believed to be the source of the sun’s energy. Under the extremely high-temperature conditions in the interior of the sun, hydrogen nuclei fuse …

Thermonuclear energy Read More »

The future of nuclear power installations

The future of nuclear power installations Nuclear reactors like most other industrial plants do not last for ever and, at the time of writing (1988) plans are in operation for decommissioning the early Magnolia reactors. The Berkeley one, mentioned in Fig. 7.6 on page 80 is one of the first for demolition. The first advanced gas-cooled reactor (AGR) …

The future of nuclear power installations Read More »

Nuclear energy

Nuclear energy We have just discussed the energy changes which lead to the generation of electricity in a coal-burning electric power station. In a nuclear electricity generating installation the heat required for raising steam is provided by a nuclear reactor instead of a coal furnace. Fig. 7.5 is a simplified diagram to show how a reactor works. It …

Nuclear energy Read More »

Heat energy

Heat energy At this point it will be advantageous to say a word about the meaning of the term heat. In everyday life we sometimes loosely refer to the “heat energy in a body”, instead of using the term: “internal energy”. In physics, heat is defined as energy which is transferred from one place to another owing to a …

Heat energy Read More »