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jet engine
Motor mà reaction

Jet engine . Sir Frank Whittle invented the jet engine in 1940. Air is drawn into this engine, the fuel is burned, and the exhaust gases are expelled out very quickly. The law of conservation of momentum shows that a small mass of gas moving very quickly can give a very large mass (jet) a small increase in speed.

Exhaust gas (fast moving gas)
Violence
Fuel nozzle
compressor
Air entry
Turbine rotating shaft


joule
joule f

The joule is the unit of energy and work named after the English scientist. When a force of one newton moves a distance of one meter, one joule of work is done.


joule - meter
day - day after day

Joule scale. A device used to measure the transfer of electrical energy in a circuit. The meters used in homes to display the electrical energy taken from the main lines are of the same type.