RP@MIT-MC (04/14/83)
From: Richard Pavelle <RP @ MIT-MC> I saw the following experiment performed: One has a glass tube say 6" in diameter. It is suspended from the ceiling on low friction rollers so that it can run horizontally on a track. Air is forced into the tube on the left and the tube of course moves to the right. Now, one heats the bottom of the tube so it gets quite hot and continues forcing air through the left end of the tube. The question is, what does the tube do? Does it move forward, backward or remain stationary and why? roller roller roller O O O | | | | | | | | | | | | | | | ----------------------------------------------------- ----> air ----> GLASS TUBE ----> ----------------------------------------------------- ^^^^^^^^^^^^ heat