Answer:
False only direction not weight.
Explanation:
Answer:
its like to orginized your stuff and at the end have a answer
Answer:

Explanation:
Index of refraction:
where
is the refractive index,
is the speed of light in vacuum and
is the speed of light in medium.
The speed of light in vacuum is 
Speed of light in medium is 
Thus,

Index of refraction of this substance through yellow light is 
no, work is = force * distance or displacement