If the earth, supposed to be a unifrom sphere contracts slightly so that its radius becomes less by `(1//n)` than before, show that the length of the day shortens by `(48//n)` hours.

If the mass of earth and radius suddenly become 2 times and 1//4th of the present value, the length of the day becomes

Mass remaining constant, if the earth suddenly contracts to one third of its present radius, the length of the day would be shorted by

If the earth suddenly contracts by one-fourth of its present radius, by how much would the day be shortened?

If earth were to shrink to (1)/(8)th of its present volume, what would be the new length of the day in hour ?

If the radius of earth contracts 1/n of its present day value, the length of the day will be approximately

If a wire of resistacne R is fold n times so that its length becomes ((1)/(n )) ^(th) of its initial length, then its new resistance becomes

Calculate the angular speed of rotation of the Earth so that the apparent g at the equator becomes half of its value at the surface. Also calculate the length of the day in this situation.

If the radius of the earth becomes half of its present value (mass remaining the same ), the new length of the day would be