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Charra [1.4K]
3 years ago
6

Please help! It’s urgent

Physics
2 answers:
Elza [17]3 years ago
7 0
What do you want help with
kobusy [5.1K]3 years ago
7 0
What do you need help on?
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Define the refraction index of a
Andrews [41]

Answer:

see below

Explanation:

refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in medium

critical angle of glass is 42 means that if the angle of incidence inside the glass is 42 degrees, then the angle of refraction in the optically less dense medium will be 90 degrees

hope this helps

6 0
3 years ago
What is true about the force between charges?
shusha [124]

Answer:

The statements A and D are true

The statements B and C are false

Explanation:

The force between charges can be explained by the Coulomb's Law.

According to Coulomb:

1 - Like charges always repel each other

2- Unlike or opposite charges always attrack each other

3- Force between 2 charges is given by:

F=k\frac{q_1q_2}{r^2}

where F is the force between 2 charges and r is the distance between 2 charges.

We can see that Force F is inversely proportional to the distance r

Which means that when F increase, r decreases and when F decreases, r increases

5 0
4 years ago
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What is the speed of sound in dry air if the temperature is 46°C?
maria [59]
The speed of sound at 46 C is 800.91 mph
7 0
3 years ago
When a bond Norma between two or more elements, what part of the atom is forming the bond?
Mumz [18]
The electrons are the only part of the atom that forms the bond
7 0
4 years ago
A rocket is fired upwards with an acceleration of 32 m/s2 . If the 200kg rocket experiences an air resistance force of 12000N, w
shutvik [7]

Answer: 20360 N

<em>If it served you, give me 5 stars please, thank you!</em>

________________________________________________________

6 0
3 years ago
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