Question

A steam engine delivers 5.4×10to the power of 8 j of work per minute and services 3.6×10 to the power of 9j of heat per minute from its hot boiler. what is the efficiency of the engine?How much heat is wasted per minute?​

Answer 1

Answer:

hi Brainly,

here ur answer,

Work done by the steam engine per minute, W= 5.4 × 10^8 J

Heat supplied from the boiler, H = 3.6 × 10^9 J

Efficiency of the engine = Output energy / Input energy

∴ η = W / H  =  5.4 × 10^8 / (3.6 × 10^9)  =  0.15

Hence, the percentage efficiency of the engine is 15 %.

Amount of heat wasted = 3.6 × 10^9 – 5.4 × 10^8

= 30.6 × 10^8 = 3.06 × 10^9 J

Therefore, the amount of heat wasted per minute is 3.06 × 10^9 J.

hope it helps!

best wishes..

HOPE..IT..HELPS..!!