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| 1. |
If earth suddenly contracts by 1/2 of its present radius by how much would the day be decreased ? |
| Answer» Solution :`I_(1)omega_(1) = I_(2)omega_(2), (2//5) mr_(1)^(2) XX (2pi //T_(1)) = (2//5) mr_(2)^(2) xx (2pi//T_(2)), T_(2)=(r//2)^(2) xx 24lr^(2), T_(2) = 6` HOURS. The day would be DECREASED by 24-6 = 18 hours | |