I am pretty sure it is B....
Answer:
<u><em>on flow properties and free-flowing and cohesive. </em></u>
Explanation:
the power Free flowing powders do not cling together, as cohesive powders stick to each other and form that do not disperse well during mixing
I believe it is D. Earth spinning on it's axis.
150*4=600
So the answer is 600
The period of the wave would be halved