To make it smooth and frictionless
To make it rust-proof
To reduce heat loss by radiation
To make it more durable
The basic reason for the extraordinary sparkle of suitably cut diamond is that
The bats can fly in the dark because
The Bernoulli’s theorem is
The best colours for a sun umbrella will be
The best conductor of heat among liquids is
The blue color of the clear sky is due to
The blue colour of the clear sky is due to
The boiling point of liquids vary as
The boiling point of water
The boiling point of water depends upon the