math
Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?
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It would take over 16,000 years for the length of a month to increase by one full day at this rate. The length of a lunar month is currently about 29.53 days, so for the month to increase by one full day the Moon's revolution needs to increase by an extra 24 hours, or 1440 minutes, or 86,400 seconds. Since the Moon is increasing its revolution by only .015 seconds per century, it would take 86,400/.015 = 5,760,000 centuries to increase by one full day, which is equal to 16,000 years.
