1.

A steam engine delivers 5.4 xx 10^(8) J of work per minute and service 3.6 xx 10^(9) J of heat per minute from its boiler. The efficiency of the engine and the loss of heat per minute are

Answer»

`30%, 9 xx 10^(9)` J
`15%, 3 xx 10^(9)` J
`15%, 3 xx 10^(12)` J
`30%,3 xx 10^(9)` J

Answer :B


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