Mechanical Energy :: essays research papers fc

Have you everwondered how a jet aircraft turn backs its tremendousweight off the ground, or what gives a runner thestamina to reach the finish line in a race? In orderto answer all these questions we must gibber aboutthe transformation of one sort of energy intoa nonher. The jet aircraft gets its power from jetturbines. These powerful jet engines create ahigh-pressure stream of real hot gases that pushthe aircraft forward as they leave the engine. Thisis an example of heat being transformed intomovement. This is sometimes described asMechanical Energy. However, this transformationcould not take place without the fuel that theaircraft gets within its wings or fuselage. Fuel isconsidered a chemical energy. This diagram showshow the jet engine acts as energy to lift the aircraftoff the surface of earth. Fuel can take the form ofgases, solids or liquids. When fuels combine withoxygen from the air, they release their storedenergy as heat. We recognize this process asburning. The indi vidual relies on food for fuelwhich contains energy-giving substances that ourbodies can store until we need this energy to useour muscles. When we do use our muscles withinus, we may not unendingly be sure that heat is givenoff. Our bodies do not burst into flames but theperspiration on our skin is a clue to what ishappening. The movement of the windsurfer has adifferent explanation. The windsurfer is propelledalong by a sail which collects mechanical energyfrom the winds that sweep along the water. Thisenergy has been produced by the sun whichwarms the earths surface and sets the air preceding(prenominal) inmotion. The suns heat comes to the earth as aform of radiant energy. When the heat reaches thesurface of the earth, it causes the land or seas torise in temperature. The sun is actually hot. Infact, thecenter of the sun can reach temperatures of up to27 million degrees Fahrenheit. This is because ofanother kind of energy reaction where newsubstances are continually being cre ated as othersare being destroyed. This reaction is known to usas the Nuclear Reaction. Today we are trying toimitate this reaction in better our energysupply. Scientists have calculated that the sun hasenough fuel to go on producing energy at itspresent rate for about five meg years. On earth