what are the units of efficiency?
and What is the SI unit if energy?
2007-06-09 22:46:56 · 5 answers · asked by ? 4 in Science & Mathematics ➔ Physics
ive done thankyou thankyou very much
2007-06-09 22:59:22 · update #1
Efficiency is unitless because its output divided by input. So if we are using Energy (the SI unit is JOULES) the output would be measured in joules and the input would be measured in joules so they would cancel out top and bottom rendering efficiency unitless.
Efficiency can also be a function of power which is measured in watts, but again when we divide one by the other the watts cancel out.
Hope that helps. You can email me If you have any more problems.
2007-06-09 22:53:54 · answer #1 · answered by tuthutop 2 · 0⤊ 0⤋
Efficiency has no unit as it is a pure ratio.
SI unit of energy is Joule
2007-06-10 05:50:08 · answer #2 · answered by Nikhil M 3 · 0⤊ 0⤋
efficiency has no units, it is a ratio of output compared to input expressed as a percentage.
Joules is the unit of enegy - 1 Joule = 1 Newton metre
2007-06-11 10:06:00 · answer #3 · answered by diane g 1 · 0⤊ 0⤋
efficiency has no units. it is measured as a ratio(of two quantitieswith same units) ora percentage.
SI unit of energy is Joule.
2007-06-10 07:40:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋
efficiency is measured as a percentage and the S.I unit for energy is the joule
2007-06-10 05:49:46 · answer #5 · answered by Dr. Eddie 6 · 0⤊ 0⤋