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A machine puts out 100W of power for every 1000W put into it The effiency of the machine is?
Wiki User
∙ 15y ago
The efficiency of a machine can be measured using the equation (Energy put out/Energy put in). In this case, the efficiency of the machine would be (100/1000), 0.1, or 10%. The efficiency can never exceed 100%, as then the machine would be creating energy from nothing! This is impossible, as can be seen from energy conservation laws. Energy is neither created nor destroyed, it is only transferred from one form to another. Because of the inefficiency of machines and mechanisms such as the one you described, energy is lost in a non-useful form every time the machine is used. This leads to the creation of low grade energy, which is useless to everyone as it cannot be re-used!
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoThe efficiency of the machine for its design purpose is 10%, and it's also doing a fine
job of heating the shop with the missing 900 watts ... about 3,070 BTU an hour !
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