On top of a spiral spring of the force constant 500Nm^-1 is placed a mass of 5 x 10^-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected

The length of piece of glass block was measured by means of a vernier calliper as shown above. The length of the glass block is

A hose of cross-sectional area 0.5m² is used to discharge water from a water tanker at a velocity of 60ms^-1 in 20s into a container. If the container is filled completely, the volume of the container is

If an object just begins to slide on a surface inclined at 30^o to the horizontal,the coefficient of friction is