A bird of mass 1.23 kg is able to haver by imparting a downward velocity of `10 m//s` uniformly to air of density `rho kg//m^(3)` over an effective area `0.1m^(2)` the acceleration due to gravity is `10m//s^(2)` then the magnitude of `rho` in `kg//m^(3)`

The r.m.s. velocity of molecules of a gas of density 4kg //m^(3) and pressure 1.2 xx 10^(5) N//m^(2) is

Find the total energy of a body of 5 kg mass , which is at a height of 10 m from the earth and falling downwards straightly with a velocity of 20 m/s (Take the acceleration due to gravity as 10m//s^(2) )

A ball of mass 0.2kg is thrown from a height of 1m and with an initial velocity of sqrt10 m //s at an angle of 45^(@) with the horizontal. Assuming, acceleration due to gravity g =10m//s ^(2), ten modulus of momentum increment during the total time of motion in kg m/s is

If acceleration due to gravity is 10 m//s^(2) , what will be the potential energy of a body of mass 1 kg kept at a height of 5 m?

A body of mass 1.0 kg is falling with an acceleration of 10 m//s^(2) . Its apparent weight will be (g=10m//sec^(2))