Consider a homogeneous circular disk that is placed on a rough, horizontal surface with a velocity to the right and with zero angular speed. Since the initial rotation rate is zero, the disk will ...

Here is why a crack will always develop. Consider a green, circular disk that is 24 inches in diameter. As this disk dries, its circumference will want to shrink about 8 percent.

Place a circular disk of ice into a warm tub of water, and you'll see the same vortex effect as the ice begins to melt. Speaking with Maine Public Radio, ...