.
.
. .
.
.
Subj:     Two Physics Puzzles (S573c)
          From: Puzzles And Brain Teasers on 1/10/2008
Source: http://www.apuzzlezone.com/adailypuzzle/01-10-08.html

1. If a solid piece of iron shaped as a doughnut was placed under
   extreme heat, what would the hole in the middle do?
 
2. Is balancing a baseball bat vertically on your hand
   easier with the larger end at the top
   or with the smaller end at the top?

                THE SOLUTION

1. It would grow larger.

2. It is easier to balance a baseball bat with the larger end at the top. This is because it gives the bat a larger moment of inertia. So, with your hand as the pivot, the bat rotates slower, making it easier to correct when it starts to topple over.
.
.