Physics
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

The floor and carpet are at different temperatures
The stone conveys the heat away from the feet more rapidly than the carpet
The carpet is a better conductor of heat than the stone
The human body maintains a constant temperature

ANSWER DOWNLOAD EXAMIANS APP

Physics
It is dangerous to observe Solar eclipse with naked eyes because

Ultraviolet radiations from Sun burn our retina
Cosmic rays reach eyes more during the eclipse
Infrared radiations from sun burn our retina
All radiations from sun initiate chemical reactions in eyes

ANSWER DOWNLOAD EXAMIANS APP