Answer:0.667 N
Explanation:
Given
It is noticed that Frictional Force is 0.2 N
Coefficient of kinetic Friction 
We know Friction Force is given by

therefore




Answer:
A. refraction of light waves
Explanation:
Refraction happens when light travels from one medium to another and changes speed and bends. This also causes objects to look different sizes and shapes when they are submerged in water.
C. Frequency is a measure of how many waves pass by in one second.
Answer:
d in my opinion is the most opitmal answer
Explanation:
aka a graph comparing distances traveled by objects thrown on Earth and the moon