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:

Efficiency of the engine = Output energy / Input energy

∴ n = W / H

= 5.4 × 108 / 3.6 × 109

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.

Answer 2

$\textbf{\huge{hello friend}}$

$\textbf{\huge{answer}}$

work done by 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

n=W/H =5.4×108/(3.6×109) =0.15

hence, the percentage of the 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 3.06×109J

$\textbf{\huge{</strong><strong>be</strong><strong> </strong><strong>bra</strong><strong>inly</strong><strong>}}$