# Physics

An engine has an efficiency of 61% and produces 7900 J of work. Determine each of the following.
(a) the input heat
J

(b) the rejected heat
J

1. 👍 0
2. 👎 0
3. 👁 36
1. Heat in * .61 = work out
Heat in = 7900/.61 = 12951 J

lost heat = 12951 - 7900 = 5051 J

1. 👍 0
2. 👎 0
posted by Damon

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