Answer to Question #237575 in Physics for Kamo

Question

Explain what Earth day is

Answer 1

A day is approximately the period during which the Earth completes one rotation around its axis, which takes about 24 hours. A solar day is the length of time which elapses between the Sun reaching its highest point in the sky two consecutive times.Days on other planets are defined similarly and vary in length due to differing rotation periods, that of Mars being slightly longer and sometimes called a sol.

The unit of measurement "day" (symbol d) is defined as 86,400 SI seconds. The second is designated the SI base unit of time.