Answer:
Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another.
Answer:

Explanation:
We have to use the centripetal force equation

we need the radious so we have to isolate "r" and we get

replacing m=65 kg, v= 4.1 m/s and Fc=455N we get


The radius of the amusement park chamber is 2.4m
If sulfur forms an ionic bond with another element it will more then likely create a chemical reaction of some sort.
Hello,
I believe they are a lever and a wedge.
I hope this helps!
I think it is the core and outer core.
hope this helped.