[Aditya Singh]

It is given that<div>

Radius of the sphere =5 cm

We know that

Volume of the sphere = 3/4 × π × r × r × r
By substituting the values
Volume of the sphere= 3/4 × 3.14 × 5× 5 × 5
= 3/4 × 3.14× 125

= 3/4 × 392.5

So we get
Volume of the sphere =523.81 m

• This reply was modified 1 year, 10 months ago by  Aditya Singh.
• This reply was modified 1 year, 10 months ago by  Aditya Singh.

[Aditya Singh]

Chinese traders went to distant lands on foot, horseback etc. They carried silk with them. These paths came to be known as silk route.

(1) Sometimes, Chinese rulers sent gifts of silk to rulers in Iran and west Asia. From there, knowledge of silk spread further west.

(2) It was very costly, as it had to be brought all the way from China. People living along the route often demanded payments for allowing traders to pass through.

(3) Some rules tried to control large portions of the route. They demanded taxes, tributes and gifts from the traders. In return, they generally protected the traders from attacks by robbers.

(4) In history the best known of the rulers who controlled the Silk Route were the Kushanas. During their rule, a branch of the Silk Route extended from central Asia down to the Indus valley. Silk was shipped westwards to the Roman empire from here.

• This reply was modified 1 year, 10 months ago by  Aditya Singh.

[Aditya Singh]

We define the human eye as the sense organ of vision. From the definition of the human eye, we understand that it is an organ that helps us to view our surroundings. Therefore, we can say that the human eye is a vital part of our body.

The structure of the human eye is rather complex. Therefore, we will only learn about some important parts of the human eye. These parts of the human eye are the cornea, iris and pupil, eye lens, ciliary muscles, retina, and optic nerves.

These parts of the human eye have roles to play in the journey of light through the human eye.
The covering of the human eye is transparent. It is known as the cornea. When light enters the human eye from the cornea, it passes through a muscular structure called the iris .It has a hole at the center called the pupil. The iris changes the size of the pupil by expanding or contracting it. Thus, it can change the amount of light that passes through the human eye.The eye-lens of the human eye focus the light on the retina. A human eye can easily see a faraway object as well as the object, kept very close to the eye.This becomes possible due to the ciliary muscles, which control the focal length of the eye-lens by stretching or contracting it. The optic nerves connected to the retina carry the information to the brain and we see the objects as they are.The given human eye diagram shows the structure of the human eye. With the help of the human eye diagram, we can understand the functions of the human eye better.

• This reply was modified 1 year, 10 months ago by  Aditya Singh.
• This reply was modified 1 year, 10 months ago by  Aditya Singh.