Physics

‘Therm’ is the unit of heat.

The SI unit of resistance is electrons.

The wavelength and frequency of these deviated colours is different, they deviate differently at different angles due to the velocity difference of the prism. The colour red therefore deviates the least since it has maximum wavelength and colour violet deviates the most since it has the least wavelength.

A small gap is left at the joints of rails in a railway track to avoid the tracks being distorted due to seasonal temperature variation.

Increasing order of velocity of sound in the following media is as follows : Air, water and iron.

When a bottle of perfume is opened in a corner of a room, the scent soon spreads all over the room. This physical procedure is called diffusion, due to which the liquid or gaseous molecules travels from the area of higher density to that of the lower density of that substance.

The pole strength of each piece when a bar magnet is cut into two equal halves perpendicular to its length is the same as the pole strength of the original bar magnet. However, the magnetic moment of each piece is half the magnetic moment of the original bar magnet.