3 years ago

What is frictional force?

1 answer:

3 0

Answer:

<u><em>Frictional force refers to the force generated by two surfaces that contacts and slide against each other.</em></u>

~Hope this helps~ T^T

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A 175 g ball on the end of a 0.5 m light string is revolving uniformly at 2 rev/s. what is the ball's acceleration and string's

BARSIC [14]

Hope it cleared your doubt.

3 0

3 years ago

As light shines from air to water (n = 1.33) at an incident angle of 45.0 degrees what is the angle of refraction

erma4kov [3.2K]

Using Snell's law
we get
sin(I)/sin(r) = U2/U1
• where U2 represent the water's refractive index and U1 represent air's refractive index
thus
sin45°sin(r) = 1.33/1
1/√2*1.33 = sin(r)
1/1.88 = sin(r)
0.531 = sin(r)
thus the refractive angle is 32°

5 0

3 years ago

what happens when light travels from one medium to another with a different index of refraction at a zero degree angle of incide

zaharov [31]

Answer:

No Refraction takes places

Explanation:

When light travels from one medium to another at an angle of incidence 0 degree then no refraction takes place .

It is because according to Refraction law

$n_{i}$ sini = $n_{r}$ sinr