Weston Allen

Physics

3 August, 08:23

The basis for defining the length of a day is the fact that question 21 options:

a. earth moves through 365.25 days a year in its orbit about the sun.

b. earth rotates on its axis in 24 hours; i. e., it rotates 15° of longitude per hour.

c. earth rotates east to west.

d. earth does not rotate; rather, it revolves.