Answer: True
Refraction is a phenomenon in which the light bends or changes its direction (and changes the speed of propagation, as well) <u>when passing through a medium</u> with a refractive index 
<u>different from the other medium. </u>
Where the Refractive index is a number that describes how fast light propagates through a medium or material:
Being a relation between the speed of light in vacuum 
and its speed in the other medium 
.
It is important to note that in this process, the wavelength may be modified because it depends on the medium, however, the refracted ray of light does not change its frequency.
Answer:
5115.2 J
Explanation:
Work: This can be defined as product of force and distance. The S.I unit of work is Joules (J).
From the question,
The expression for work is given as
W = F×d................. Equation 1
Where W = Work done by team A, F = Force applied by team A, d = distance moved by team B.
Given: F = 1390 N, d = 3.68 m
Substitute into equation 1
W = 1390×3.68
W = 5115.2 J.
Hence the work done by team A in pulling team B = 5115.2 J
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Answer:
The net torque on the square plate is 2.72 N-m.
Explanation:
Given that,
Side = 0.2 m
Force 
Force 
Force 
We need to calculate the torque due to force F₁
Using formula of torque
Put the value into the formula
We need to calculate the torque due to force F₂
Using formula of torque
Put the value into the formula
We need to calculate the torque due to force F₃
Using formula of torque
Put the value into the formula
We need to calculate the net torque on the square plate
Hence, The net torque on the square plate is 2.72 N-m.
You are correct in your thinking
hope this helps
