eggyhz1980
29.10.2020 •
Physics
if it takes 300 joules of work to move a piece of furniture 30 meters in 15 seconds, what is the power?
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Ответ:
Ответ:
Efficiency in general means How well an object does with respect to its designated purpose for example a battery with Voltage of 10 volts won't exert 10 volts but slightly less due to internal resistance let's say 8V so efficiency will be 8/10 x100 = 80%
Same thing with a machine/engine If an engine is designed to produce 150 horsepower it won't give you the full energy due to part of the energy being dissipated in form of heat due to friction so let's say 145 hp is produced which is 96% efficiency