Two point masses of mass 4m and m respectively separated by d distance are revolving under mutual force of attraction. Ration of their kinetic energies will be:
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How is Lactometer based on Archimedes' principle?
Why does a mug full of water feel lighter inside water?
A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest.
How will you 'weigh the sun', that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5× 108 km.
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Which of the following is an application of Archimedes' principle?
A star 2.5 times the mass of the sun and collapsed to a size of 12 km rotates with a speed of 1.2 rev. per second. (Extremely compact stars of this kind are known as neutron stars. Certain stellar objects called pulsars belong to this category). Will an object placed on its equator remain stuck to its surface due to gravity ? (mass of the sun = 2× 1030kg).