Category Archives: WHY?
105.WHY DO DEER SHED THEIR ANTLERS?
Deer are vegetarians who feed on moss, bark, buds, leaves, or water plants. They are usually very timid animals, and they depend on their speed for safety. They generally feed at night. They have very good eyesight, and their senses of hearing and smell are so sharp that they are able to detect danger easily. Deer vary in size from the little pudu, which is only a foot tall, to the great moose, which may weigh more than 450 kilograms.
90.WHY DOES CORK FLOAT?
The little boy who brings his line to the old fishing hole uses a piece of cork as a “floater” without ever wondering what keeps that piece of cork bobbing on top of the water. But the capacity of cork to float has been known since ancient times, and cork life-preservers saved many a life thousands of years ago!
Cork is much lighter than water. The reason it floats is that water does not easily penetrate the walls of the cells, which are filled with air. This prevents the cork from becoming water-logged and sinking.
89.WHY DOES A TOP SPIN?
If you put a pencil on a table and give it a twist, it will spin around several times. So will a ball, or in fact, any object that you can make turn. So what makes a top spin, is the force, or energy, you apply to it.
But what keeps a top spinning? And why does it keep spinning in a certain position!
