A satellite is moving on a circular path of radius r around the earth has a time period T.If its radius slightly increases by Δr,the change in its time period is 

In a vernier callipers N divisions of vernier scale coincide with N - 1 divisions of main scale (in which length of one division is 1 mm).The least count of the instrument should be

If x = at +bt² ,where x is the distance travelled by the body in kilometer while t is the time in second,then the unit of b is

"Pascal - second" has the dimensions of:

Chandrasekhar Limit is the unit of:

The dimensional formula for surface tension is

The dimensional formula of angular momentum is

Light year is a unit of:

If an instrument gives nearly equal values in repeated measurements, it possess

A certain body weighs 22.42 g and has a measured volume of 4.7 cc.The possible error in the measurement of mass and volume are 0.01 g and  0.1 cc.Then maximum error in the density will be