Q. The absorption of ink by blotting paper involves ?

? Capillary action phenomenon

Q. Nuclear sizes are expressed in a unit named

? Fermi

Q. Light year is a unit of

? Distance

Q. Mirage is due to

? unequal heating of different parts of the atmosphere.

Q. Light from the Sun reaches us in nearly

? 8 minutes

Q. Pa(Pascal) is the unit for

? Pressure

Q. Pick out the scalar quantity

? Pressure

Q. Sound waves in air are

? Longitudinal

Q. Magnetism at the centre of a bar magnet is

? Zero

Q. Lux is the SI unit of

? Intensity of illumination