Earth's rotation is slowing down because of the tidal interaction between Earth and the Moon at a rate of 2 milliseconds per century. If this rate remains constant at the present value, how long will it take for 1 day on Earth to become 2 seconds longer than it is now?

Question

Quizplus · Accepted Answer

If Earth's rotation is slowing down at a rate of 2 milliseconds per century, then it will take 500,000 centuries (1000/2) for 1 day (24 hours) to become 2 seconds longer. 500,000 centuries is equal to 50,000 years, so the answer is D) 100,000 years.

Earth's Rotation Is Slowing Down Because of the Tidal Interaction