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Dovator [93]
3 years ago
9

Abody is moving according to the relation:vf=21,then its displacement after 5s

Physics
1 answer:
mafiozo [28]3 years ago
5 0
Answer: 10m look it’s hard but I can say the Explanation
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An optical fiber made of glass with an index of refraction 1.50 is coated with a plastic with index of refraction 1.30. What is
Helen [10]

To solve this problem we will use Snell's law. This law is used to calculate the angle of refraction of light by crossing the separation surface between two means of propagation of light (or any electromagnetic wave) with a different index of refraction.

n_1 sin\theta_1 = n_2 sin\theta_2

Where,

n_{1,2} = Index of refraction for each material

\theta_1= Angle of incidence and refraction

A ray of light propagating in a medium with index of refraction n_1 hitting an angle \theta_1 on the surface of a medium of index n_2 with n_1> n_2 can be fully reflected inside the medium of highest refractive index:

\theta_{critical} = Sin^{-1}(\frac{n_1}{n_2})

n_1 Refractive index of rarer medium

n_2 Refractive index of denser medium

Replacing we have,

\theta_{critical} = Sin^{-1}(\frac{n_1}{n_2})

\theta_{critical} = Sin^{-1}(\frac{1.3}{1.5})

\theta_{critical} = 60.07\°

the critical angle of this fiber at the glass-plastic interface is 60.07°

8 0
3 years ago
How does Newton’s first second and third laws apply to eating your breakfast
____ [38]

Answer:

Newton's third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects. However much you push your fork in the food, that much a dent it will cause.

Explanation:

6 0
3 years ago
Read 2 more answers
Mind being a helping hand? I know ABSOLUTELY nothing about air resistance.. It's still science for me so I guess I'll put it as
Contact [7]

Answer:

the first one would

Explanation:

air resistance and the second would be gravity or mass

if you need an explanation ask

8 0
3 years ago
DNA is composed of subunits called nucleotides. What are the 3 parts of a nucleotide?
qaws [65]

Explanation:

1) Nitrogenous base

2) Pentose sugar

3) One or more phosphate group

3 0
3 years ago
A couch of mass 210 kg is being pushed across the floor with an applied force of 4100 N. The coefficient of kinetic friction bet
Dennis_Churaev [7]
Let us use the formula for Newton's Second Law of Motion:

Net force = Mass*Acceleration
Net force = Applied Force - μ*Normal Force
where μ is the coefficient of kinetic friction

Normal Force = Force due to gravity = mass*gravity
Normal Force = (210 kg)(9.81 m/s²) =<em> 2,060.1 N</em>

Then,
Net force = 4100 - 0.38*2060.1 = 3317.162 N

3317.162 N = (210 kg)(a)
Solving for acceleration,
<em>a = 15.796 m/s²</em>
8 0
4 years ago
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