An internal combustion engine has an efficiency of 22.3%. This engine is used to deliver 6.25x 40 J of work to drive the motion of the train. What is the total energy that needs to be put into the engine?

Explanation:

efficiency = energy output x 100  / energy input

putting the values

22.3 = 6.25 x 10⁴ x 100 / energy input

energy input = .28 x 10⁶

= 28 x 10⁴ J  

energy that needs to be put into the engine = 28 x 10⁴

Answer is c. water in a slow moving water is slow because it is under less pressure(or no pressure)a. is not about a fluidb. not a fluid either, but also it talks about compressing which is the same as squeezing or tightening, so it will always be associated with increase in pressure, and the “pressurized tank” at the end confirms this d. moving from a wider to a narrower space always increases pressure