GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How long does it take the earth to rotate once?
A
12 hours
B
24 hours
C
20 hours
D
36 hours
Explanation: 

Detailed explanation-1: -The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40, 075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second–or roughly 1, 000 miles per hour.

Detailed explanation-2: -The Spinning Earth: Answers Answer: The Earth rotates through 15° each hour so to rotate through 30° degrees it would take 2 hours.

Detailed explanation-3: -The earth takes about 24 hours to complete one rotation on its axis. The period of rotation is known as the earth day.

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