Everyone knows that when you heat something up it expands. Well, almost everything, except water around the freezing point and a few other weird substances. One example of something that expands when heated is the brass plate shown in the photograph below.
The question this week involves the hole.
When the brass plate is heated up by the gas burner shown in the photograph, the hole will:
Click here for Answer #57 after March 26, 2001.
