Question

a steam engine delivers 5.4×108 J of work per minute and services 3.6×109 J of heat per minute from its boiler
what is the efficiency of the engine
how much heat is wasted per minute

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Answer 1

Answer:

Work done by the steam engine per minute, W = 5.4 × 108 J

Heat supplied from the boiler, H = 3.6 × 109 J

Efficiency of the engine = Output energy / Input energy

∴ η = W / H = 5.4 × 108 / (3.6 × 109) = 0.15

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

Amount of heat wasted = 3.6 × 109 – 5.4 × 108

= 30.6 × 108 = 3.06 × 109 J

Therefore, the amount of heat wasted per minute is 3.06 × 109 J.

Explanation:

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Answer 2

Answer:

Explanation:

hi Brainly,

here ur answer,

Work done by the steam engine per minute, W= 5.4 × 108 J

Heat supplied from the boiler, H = 3.6 × 109 J

Efficiency of the engine = Output energy / Input energy

∴ η = W / H  =  5.4 × 108 / (3.6 × 109)  =  0.15

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

Amount of heat wasted = 3.6 × 109 – 5.4 × 108

= 30.6 × 108 = 3.06 × 109 J

Therefore, the amount of heat wasted per minute is 3.06 × 109 J.

hope it helps!

best wishes