Two sound waves have frequencies 256 Hz and 260 Hz. The

The reason for a swimming pool to appear less deep than the actual depth is –

In a concave mirror which of the following pair of position of object – size of the image is correct?

I. At infinity – point sized

Angle of friction and angle of repose are

The phenomenon of interference is based on the principle of:

The shape of our Milky Way galaxy is

The half-life of a radioactive substance is 5 hours. How much of the substance remains after 15 hours?       

What is the electrical charge of a neutrino?

What will happen to the volume of ozone, when it is heated?

A particle is projected such that its velocity vector sweeps equal angles with horizontal at equal time intervals. The motion is best described as: