Physics
Intensity of sound has

an object existence
a subject existence
both subjective and objective existence
no existence

ANSWER DOWNLOAD EXAMIANS APP

Physics
It is easier to roll a barrel full of coal tar than to pull it because

the full weight of the barrel comes into play when it is pulled
more surface area of the barrel is in contact with the road when it is pulled
coal tar is a liquid and it flows in the barrel when it is rolled
the rolling friction is much less than the sliding friction

ANSWER DOWNLOAD EXAMIANS APP