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## Homework Statement:

- Assuming the length of the day uniformly increases by 0.001 second per century, Calculate the net effect on the measure of time over 20 centuries. ( in hours)

## Relevant Equations:

- Length of the day after 20 centuries is 24 hours and 0.21s

Since the length of day is greater by 0.21 seconds, thus the change in time = ##\frac{0.21*365*100}{60*60}## hours = 2.1 hours.

Here, I do not understand why the length of the day increases by 0.21 seconds instead of 0.2 seconds.

Here, I do not understand why the length of the day increases by 0.21 seconds instead of 0.2 seconds.