Answer:
35.16 degrees
Explanation:
Knowing that the index of refraction of the guide is 1.33, calculate the resulting angle of refraction for a ray of light that falls on a pool with an angle of incidence of 50º
Refractive index, n = 1.33
The angle of incidence, i = 50°
We need to find the angle of refraction. let it is r. It can be calculated using Snells law as follows:

So, the angle of refraction is 35.16 degrees.
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Answer:
Explanation:
Given
rope makes an angle of 
Mass of sled and snow is m
Normal Force 
applied Force is F
as Force is pulling in nature therefore normal reaction is given by

Also 


-------1
---------2
Squaring 1 & 2 and then adding


Substitute value of F in 1

