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posted by Olivia on Tuesday, January 3, 2012 at 7:10pm.

How long does it take a 20 kW steam engine to do 7.3×10^7 J of work?

2*10^4 joules/second*t seconds =7.3*10^7J t = (7.3/2) 10^3 = 3.65 * 10^3 seconds = 3,650 seconds = 1.01 hours

thank you so much!

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