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3 years ago

A steam engine does 12 kJ or work in 55 s. how much power does the engine produce?

Physics

2 answers:

allsm [11]3 years ago

8 0

Answer:

Power, P = 218.18 watts

Explanation:

It is given that,

Work done by the steam engine, $W=12\ kJ=12\times 10^3\ J$

Time taken to do work, t = 55 seconds

Power produced by the engine is given by work done divided by time taken i.e.

$P=\dfrac{W}{t}$

$P=\dfrac{12\times 10^3\ J}{55\ s}$

P = 218.18 watts

Hence, this is the required solution.

Georgia [21]3 years ago

6 0

P=w/t
12kj=12000J
the answer is p=12000/55=218.18

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Answer:

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As per the question:

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Now,

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Now,

$I = \frac{P}{4\pi R^{2}}$

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$I' = \frac{P}{4\pi (R + 11.0)^{2}}$

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$\frac{I}{I'} = \frac{(R + 11.0)^{2}}{R^{2}}$

$\frac{10^{- 5.36}}{10^{- 6.426}} = \frac{(R + 11.0)^{2}}{R^{2}}$

$R ^{2} + 22R + 121 = 11.64R^{2}}$

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R = 4.56 m

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