The force between the molecules of a liquid in contact with that of a solid is

A reservoir is filled with a liquid of density 2000kgm^-3. Calculate the depth at which the pressure in the liquid will equal to 9100Nm^-2 [g = 10ms^-2]

A solid weight 45N and 15N respectively in air and water. Determine the relative density of the solid

A boy travels 8 km eastward to a point B and then 6km northward to another point C. Determine the difference between the magnitude of displacement of the boy and distance travelled by him