Heat: efficiency

[Dx]

A heat engine has efficiency of 35% and recieves 150J heat per cycle. how much work dos it perfrom in each cycle?

I said 52.5J

w=e*q_h =
.35 * 150 =
52.5
its wrong

what did i do wrong with this calculation. unless it mean 150J of put in. can anyone please explain this to me.
TY!
dx [;)]

[Tom Mattson]

Can you post the definition of efficiency from your book?

[Dx]

efficiency(e) = W(work out) / Q_H(work in)

[Tom Mattson]

Originally posted by Dx
efficiency(e) = W(work out) / Q_H(work in)

That's what I thought. OK, just plug-n-chug.

(You know, it's always possible that the book is wrong!)

[Dx]

Originally posted by Dx
A heat engine has efficiency of 35% and recieves 150J heat per cycle. how much work dos it perfrom in each cycle?

I said 52.5J

w=e*q_h =
.35 * 150 =
52.5


I thought i did that like shown but aparently its not right. I just wanted to know does your answer match mine?
Dx[;)]

[Tom Mattson]

Yes, it does.