If a steam engine does 500 j Of useful work, how much work is needed to put in if the efficiency rating of 18%
To calculate the amount of work needed to put in, we first need to calculate the total amount of work done by the steam engine.
The formula for efficiency is given by:
Efficiency = (Useful work output / Total work input) * 100
Therefore, we can rearrange the formula to solve for Total work input:
Total work input = Useful work output / Efficiency
Total work input = 500 J / 0.18 = 2777.78 J
Therefore, the work needed to put in is 2777.78 J.