An engine manufacturer makes the claim that the engine they have developed will, on each cycle, take 100j of heat out of boiling water at 100∘c, do mechanical work of 80j, and exhaust 20j of heat at 10∘c. what, if anything, is wrong with this claim?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples