Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

Both suffer the same change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball
The rubber ball suffers greater change in momentum
The metal ball suffers greater change in momentum

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 warn the ships coming from different directions in the ocean
Guide and help large crowds at religious gathering during nights

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Physics