also grug find two identically sized rocks. if rock throw from tree, bigger wave than if throw same rock from ground. grug therefore conclude that big height and big time of fall of rock mean more energy and bigger wave <|endoftext|> grug throw rock in water, water make small wave. grug throw similar rock from tree, grug see water make bigger wave. grug know second rock carry more energy than first rock. grug therefore conclude that more energy mean bigger wave. <|endoftext|> 