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.

a. Wrong. EM waves can travel through matter OR vacuum.

b. True, but so can mechanical waves.

c. Wrong. Waves transfer energy, not matter.

d. This is it. EM waves can travel through empty space, and mechanical waves can't.

d) physical means can be used to separate the components of air.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;