UNICAL Physics 2017/2018 Past Questions

Practice each question, then open it to see the full details.

A 12V battery supplying a current 20A was used to melt 1.5kg of ice 00C. Calculate the time required if the latent heat of fusion of ice is 336 x 101J/Kg

A.35.0min
B.3.5min
C.76min
D.21.0min

The light from the sun reaches the earth mainly by

A.convection
B.conduction
C.radiation
D.reflection

One valid assumption of the kinetic theory of gases is that

A.the molecules are in random motion and the number of collision is constant
B.the number of molecules increases with the pressure
C.the molecules of the gas are all identical and are very small in size
D.the number of molecules increases with temperature

An astronomical telescope is said to be in normal adjustment when the

A.eye is accommodated
B.focal length of the objective lens is longer than that of the eye piece
C.final image is at the near point of the eye
D.final image is at infinity