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mojhsa [17]
4 years ago
11

What is the index of refraction

Physics
1 answer:
ehidna [41]4 years ago
6 0

Index of refraction for any material = speed of light /speed of light in the material.

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If the moon were twice its present distance from earth, what would be the most noticeable effects on earth events
Veronika [31]
There would be no light at night foe nocturnal animals
5 0
4 years ago
How does kinetic energy affect the stopping distance of a small vehicle compared to a large vehicle?
zhannawk [14.2K]
The equation for kinetic energy is KE=1/2mv^2
So if the small vehicle AND the large vehicle both had the same speed, the large vehicle would have more kinetic energy since it has greater mass, resulting in a much more larger stopping distance than the smaller car.
6 0
4 years ago
A large pendulum swings in the lobby of the United Nations building in New York City. The pendulum has a 91-kg gold-plated bob a
Dafna1 [17]

Answer:

t = 2.40 s

Explanation:

It just told me

6 0
3 years ago
In a circuit, three pieces of wire labeled A, B and C are joined at a common point, D. If wire B carries 1.5 mA in a direction a
Alex_Xolod [135]

Answer:

correct option is a. 0.2 mA toward D

Explanation:

given data

B carries = 1.5 mA

C carries current  = 1.3 mA

solution

we take positive direction of current going away from the point D

and negative direction of current coming towards point D

so we use here kirchoff's current law   that is

iA + iB + iC = 0    ......................1

iA + 1.5 + (-1.3) = 0

iA = - 0.2 mA  

so that current in wire A is 0.2 mA towards point D

correct option is a. 0.2 mA toward D

7 0
3 years ago
What is the speed of a 200-kilogram car that is driving with 2000 joules of kinetic energy? (SHOW ALL WORK)
Katyanochek1 [597]

Answer:

v ≈ 4.47

Explanation:

The Formula needed = <u>KE = </u>\frac{1}{2}<u> m v²</u>

<u></u>

Substitute with numbers known:

2000J = \frac{1}{2} × 200kg × v²

Simplify:

÷100       ÷100      (Divide by 100 on both sides)

2000J = 100 × v²

\frac{2000J}{100} =  v²

20 = v²

√         √             (Square root on both sides)

√20 = √v²

4.472135955 = v (Round to whatever the question asks)

v ≈ 4.47       (I rounded to 2 decimal places or 3 significant figures, as that is what it usually is)

3 0
3 years ago
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