A. very small objects behave like like particles.
Answer:
B
Explanation:
Spectroscopy measures electromagnetic radiation.
Answer:

Explanation:
The object is moving to and fro about its mean position
and the equation for its displacement is given as

now in one complete time period we know that the the object will complete its one oscillation
So the change in the position of the object in one complete time period will be ZERO
so here we can say that

since change in position is zero
so displacement = 0

Answer:
I believe it is C.
Explanation:
I believe this because Scientist could not discover this without evidence.
And a law would not do anything but give them more reason to support the theory of plate tectonics.
And the seafloor could be a possible outcome but i know for a fact that scientist have a device that can go into earth's core to study the movements.
This is why i believe it is C.
Sorry if it is wrong im new to this.