The earth and its weight. It is impossible to find out the

weight of the earth by any type of balance. If we express it

in tons, the number of zeros required to do so would occupy

almost more than half of a volume of this book. Therefore,

we will try to express it in a simpler way as follows.

Take an example of hollow ball of the same size as the earth

consisting entirely of water (i.e. a solid ball of water).if

we weigh this ball we find this 5 1/2times lighter than that

of the weight of the earth. This is actually means that the

relative 5 1/2 or 5.5.