Ask question

Ask question

All categories

steposvetlana [31]

2 years ago

14

What is the index of refraction of a refractive medium if the angle of incidence in air is 40 degrees and the angle of refractio

n is 29 degrees?

1 answer:

Artemon [7]2 years ago

8 0

N= 1.33
Explanation: (1) sin 40 degrees = n(sin 20 degrees)

You might be interested in

Select the correct answer.

BaLLatris [955]

It is due to the excess stress.

6 0

3 years ago

2.A chef leaves a copper spoon, a wooden spoon, and a steel spoon in a pot of boiling soup for several minutes. Which spoon shou

Shkiper50 [21]

Answer:

Option B

Explanation:

The correct answer is Option B

After leaving the spoon of copper , steel and wooden in the soup for several minute chef can grab Wooden spoon with bare hand.

Wooden material are insulator of heat means heat does not transfer through the wooden material.

where as heat transfer take place in steel as well as copper and chef will not be able to lift the spoon bare hand.

5 0

3 years ago

Read 2 more answers

The force on an object is given by the equation F = ma. In this equation, F is the force, m is the mass, and a is the accelerati

Bumek [7]

Answer:

The correct answer is 1242 N

5 0

3 years ago

A well blended mixture that contains at least one solute and one solvent is a _____.

tensa zangetsu [6.8K]

A solution, an example is salt and water. brainliest?

4 0

3 years ago

To throw the discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant a

swat32

<u>Complete Question:</u>

To throw the discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant angular acceleration, releasing the discus after making one complete revolution. The diameter of the circle in which the discus moves is about 1.9 m.

If the thrower takes 1.0 s to complete one revolution, starting from rest, what will be the speed of the discus at release?

<u>Answer:</u>

11.94 m/s will be the speed of the discus at release.

<u>Explanation:</u>

Given data:

Time taken to complete one revolution = 1.0 s

Diameter of the circle, D = 1. 9 m

The radius of the circle is the half of the diameter. So,

$r=\frac{D}{2}=\frac{1.9}{2}=0.95 \mathrm{m}$

One revolution is equal to 360 degree or 2 pi or 6.28 radians. Average speed is the ratio of total distance to the time. It can be expressed as

$\text {average speed, } v_{a v}=\frac{\text {total distance}}{\text {total time}}=\frac{2 \times \pi \times r}{1}$

$2 \times \pi \times r$ – The distance reached by the thrower to make one revolution

$v_{a v}=2 \times 3.14 \times 0.95=5.966 \mathrm{m} / \mathrm{s}$

Now, we need to the final velocity (speed of the discus at release). This can be done as below

$v_{a v}=\frac{1}{2} \times\left(v_{i}+v_{f}\right)$

By taking the average of combining both initial and final velocity, we get average velocity. Here, initial velocity is zero.

$5.966=\frac{1}{2} \times\left(0+v_{f}\right)$

$v_{f}=5.966 \times 2=11.932 \mathrm{m} / \mathrm{s}$

6 0

3 years ago