A Turbulent Time: The 1905 Revolution

A fan is making 600 revolutions per minute. If after some time it makes 1200 revolutions per minute, then the increase in its angular velocity is

A planet is at R distance from sun and its time period of revolution is T. What will be its new time period of revolution if it brought 0.5 R distance closer to sun ?

Assertion: The time period of revolution of a satellite close to surface of earth is smaller then that revolving away from surface of earth. Reason: The square of time period of revolution of a satellite is directely proportioanl to cube of its orbital radius.

In an orbit if the time of revolution of satellite is T , then PE is proportional to

The time period of revolution in the 3^(rd) orbit of Li^(2+) ion is x sec. The time period of revolution in the 2^(nd) orbit of He^(+) ion, should be

The time period of revolution in the 3rd orbit of Li^(2+) ions is x sec . The time period of revolution in the 2 nd orbit of He^(+) ion , should be :

The time period of revolution of electron in its ground state orbit in a hydrogen atom is 1.60 xx 10^(-16) second. The time period of revolution of the electron in its first excited state in a Li^(++) ion is: