OpenStudy (anonymous):

Please help What is the efficiency of a device that takes in 40,000 J of heat and does 12,000 J of work while giving off 28,000 J of heat? Use and convert to a percentage. A. 57% B. 43% C. 30% D. 70%

2 years ago
OpenStudy (welshfella):

(12,000/40,000 ) * 100

2 years ago
OpenStudy (amistre64):

Pout ---- Pin amount of work, for a given input seems reasonable. i dont know why i remember it as the waste tho.

2 years ago
OpenStudy (anonymous):

30 thanks

2 years ago
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