At what speed the volume of an object shrinks to half its rest value ?

What should be the period of rotation of earth so as to make any object on the equator weig half of its present value?

What should be the period of rotation of earth so as to make any object on the equator weig half of its present value?

At what temperature, the r.m.s. speed of the molecules of a gas is half its value at NTP?

Fill in the blanks with appropriate words and write the completed sentences: If the earth shrinks to half of its radius, its mass remaining the same, the weight of an object on the earth will become........ times.

Write True or False If the length of radius of a cylinder is half then the volume of its will be half of its previous volume.

On doubling the speed of an object its-

If the earth suddenly shrinks to half of its present radius, the acceleration due to gravity will be