Radiocarbon is produced in the atmosphere as a result of
Siphon will fail to work if
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
The absorption of ink by blotting paper involves
Nuclear sizes are expressed in a unit named
Fermi - A unit of length equal to 10-15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton.
Light year is a unit of
Mirage is due to
Light from the Sun reaches us in nearly
Stars appears to move from east to west because
Pa(Pascal) is the unit for
Planets do not twinkle because
Metals are good conductors of electricity because
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
Pick out the scalar quantity
Rectifiers are used to convert
out of the following, which is not emitted by radioactive substance?
Neutrons are not emitted by radioactive substance.
Sound waves in air are
Magnetism at the centre of a bar magnet is
It is more difficult to walk on a sandy road than on a concrete road because
Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2
Of the following properties of a wave, the one that is independent of the other is its
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is