Explanation

• The scientist who first discovered that the earth revolves around the sun was Copernicus.
• Earth's Rotational Theory:
  • Rotation can be defined as the spin of Earth on its own axis from west to east direction.
  • It must also be noted that the speed of rotation of the earth is not constant throughout latitudes.
    
  • It differs at different latitudes.

Explanation

Explanation

The man is poor but honest.

آدمی غریب ہے لیکن ایماندار ہے۔

- The conjunction "but" is used to show contrast between being poor and honest.

Explanation

The British Prime Minister Ramsay MacDonald announced the Communal Award in 1932 at the end of the Second Round Table Conference.

The Communal Award was a series of elections for minority groups in society and the economy.

It was established on August 16, 1932, as a result of the second round table meeting. 

Explanation

Demography is the statistical study of the human population,

Including aspects such as size, structure, distribution, and dynamics.

It examines factors like birth and death rates, migration, age, sex, and occupation, among others.

انسانی آبادی کا شماریاتی مطالعہ ڈیموگرافی کہلاتا ہے۔

Explanation

Babur, the first Mughal emperor, was born in present-day Uzbekistan and became ruler of Kabul in Afghanistan.

From there, he invaded the kingdom of the Lodi Afghans in northern India in 1526 

There are 17 Mughal  families who rule in India.

Explanation

30% = 30/100 = 0.3

Explanation

An angle is a figure formed by two rays, called the sides of the angle,

Two lines that make an angle are called rays

In plane geometry, an angle is a figure formed by two rays,

ND2-03-2023

Explanation

Vertical columns in the periodic table are called groups.

Horizontal rows are called periods.

Explanation

In HNO₃ (nitric acid):

Hydrogen (H) = +1

Oxygen (O) = -2 (×3 = -6)

Let nitrogen = x

So, +1 + x + (−6) = 0

⇒ x = +5

Nitrogen has an oxidation state of +5 in HNO₃.