5+ Year Member
Apr 6, 2010
Medical Student
A balloon with a piece of lead is put at the bottom of a pool. The lead is removed and the balloon is allowed to rise, changing volume and temperature of the balloon.

Which would NOT help predict how temperature changes with depth?

A. Number of air molecules inside the balloon
B. Thermal conductivity of the rubber
C. Variation with depth in speed of the balloon
*D. The total mass of water in the tank

I'd like to understand all the answer choices, please. Thanks very much.