Physics
The tidal waves on sea is mainly due to

None of these
Gravitational Effect of Earth on Moon
Gravitational Effect of Sun on Earth
Gravitational Effect of Moon on Earth

ANSWER DOWNLOAD EXAMIANS APP

Physics
Light houses are places with powerful lights to :

Indicate to the incoming warships, the location of a harbour during night
Guide and resolve traffic jams in crowded metro-cities during nights
Guide and help large crowds at religious gathering during nights
Guide and warn the ships coming from different directions in the ocean

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why two thin shirts can keep us warmer than a single thick shirt in winter ?

Air layer between two shirts behaves like insulating media
Two thin shirts become thicker so prevent transmission of heat
No radiation of heat takes place
Air layer between two shirts works as good conductor

ANSWER DOWNLOAD EXAMIANS APP