The pressure on a dam wall has nothing to do with the volume of water behind it (see chapter on Bernoulli). Carnot's principle has nothing to do with losses due to friction & finite insulation; it states that even with zero friction & infinite insulation there is still an inevitable loss when converting heat energy to mechanical energy; the specific heat of air is very low compared to water, yet this book claims just the opposite. The errors go on & on, & I'm astonished that no one seems to have spotted at least one of the ones mentioned above