If the ice on the polar caps of the earth melts, how will it affect the duration of the day? Explain.

If the ice on the polar cap of the earth melts how will it effect the duration of the day?

When the earth shrinks to half of its radius, without reducing its mass, what change will be there in the duration of a day?

Explain why earth's magnetic field does not affect the working of a moving coil galvano meter.

If the radius of earth becomes half of it's present radius how many times decrease in a day.

If the earth's satellite is put into an orbit at a height where resistance due to atmosphere cannot be neglected, how wiil motion of satellite be affected?'

If earth be at half of its present distance from the sun, how many days will there be in a year?

If the earth suddenly contracts to one third of its present radius, how much would the day be shortened ?

How much steam at 100°C will just melt 3200g of ice at -10°C ?