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Brilliant_brown [7]
3 years ago
14

A bulb converts 9J of energy in each second from an input of 100J of energy. Calculate efficiency of this light bulb

Physics
1 answer:
77julia77 [94]3 years ago
8 0
Efficiency is calculated through dividing the actual mechanical advantage by the hypothetical mechanical advantage:

- the actual mechanical advantage is 9J because that's how much work the light bulb doing

- the hypo. mechanical advantage is 100J. Ideally, in a perfect world, the light bulb can convert 100J input into 100J output, but do to resistance and other factors it is not possible.

\frac{9}{100}  = .09
change the decimal to a percentage:

.09 = 9\%
the light bulb had 9% efficiency
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