Physics

               As we use up natural resources such as coal and oil, there is a constant search for new sources of energy. The Sun gives out vast amounts of energy, of which only a tiny fraction reaches the Earth. If we could use just a small part of this energy it would fulfil all the world’s foreseeable needs for power, but so far it has not been possible to find efficient ways to collect solar energy. We harness the Sun’s energy with solar panels. This energy is then used to heat water.

Picture credit: google

            Like rockets, jet engines propel an aeroplane with a stream of hot gases. Unlike rockets, which produce hot gas as a result of burning an explosive mixture, jet engines burn fuel in the air that they draw in at the front of the engine?

            Air enters the front of the engine and is compressor wheel. Fuel is injected into the compressed air, burns fiercely and expands. The hot gas rushes out of the jet pipe at the rear of the engine. The hot gas passes through a turbine, which drives the compressor at the front of the engine.

Picture credit: google