Question

to calculate the diffetence the local times of any two places on the earth​

Answer 1

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The time difference between one degree of longitude is 4 minutes and the degrees of longitudes is essential in finding out the time difference between two places. The earth is divided into 360 longitudes, all of which are imaginary. The difference between any two adjacent longitudes is four minutes.

Answer 2

Explanation:

Ground or Earth

A ground symbol (IEC symbol 5017) identifies a ground terminal. It can be used for a zero potential reference point from where current is measured. It is also for electrical shock protection.