I want to say frequencies would be the answer. I could be wrong though. Hope this may have helped!
Answer:
C. Weight is mass times the acceleration of gravity.
Explanation:
Weight is the force exerted by gravity. Force is equal to mass times acceleration.
Answer:
number 4
Explanation:
The reflection of light happens when the light bounces off the reflecting surface. That is described by the last (bottom) schematics.
Therefore, select answer number 4.
-B because metal hardly breaks but non metal items such as glass or plastic does!