Car Talk puzzler to wrap your head around buoyancy: Tommy's Cubed Car One day, Ray secretly takes Tom's beloved black 1965 AMC Ambassador convertible to the crusher, where it's transformed into a 3-by-3-by-3-foot solid cube of rust, headrests, and mice and placed on a garbage barge. While the barge is crossing a lake, it falls overboard. Assuming water can't escape from the lake, does the water level go up, go down, or stay the same? I'll post the answer tomorrow. Don't worry, the answer contains an explanation.