Which statement describes a way electromagnetic waves are different from mechanical waves?
a. electromagnetic waves can travel only through matter.
b. electromagnetic waves can carry energy over a distance.
c. electromagnetic waves can transfer matter through empty space.
d. electromagnetic waves can travel through empty space.
its c i think
the only correct statement on this list is (d).
momentum of a body is defined as the product of its mass and velocity.
so, when an object is moving, it has momentum.
if and are the masses of objects a and b and are their initial velocities. so, their initial momentum will be:
if after collision it bounces back with same velocities, then final momentum becomes:
-ve sign shows that the motion is in opposite direction.
hence, its final momentum is in opposite direction of initial momentum.