The mass of an empty 40 litre petrol tank of a velocity is 8 Kg. What will be its mass when filled complete with a fluid of density `700 kg m^-3`

Mass of an object is 7 kg. What is its weight?

Mass of an object is 10 kg. What is its weight?

The mass to charge ratio (m//e) for a cation is 1.5xx10^(-8) kg//C. What is the mass of this cation?

Mass of an object is 10 kg. What is the weight on the earth (g = 9.8 ms^-2) ?

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle 30^@ with each other. When suspended in a liquid of density 800 kg m^-3 , the angle remains the same. Wahat is the dielectric constant of the liquid? The density of the material of the sphere is 1600 kg m^-3

A man throws a ball of mass 0.5 kg vertically upwards with a velocity of 1ms^( -1) . What will be its initial momentum ? What would be its momentum at the highest point of its reach ?

What is the velocity of wave in a sting of line or mass density m when strotched to tension T?

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 ms ^(-1).

The kinetic energy of an object of mass 'm' moving with a velocity of 5ms^-1 is 25 J. What will be its kinetic energy when its velocity is doubled ? What will be its kinetic energy when its velocity is increased to three times.