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Explanation

Henry Cavendish - He discovered hydrogen gas and the composition of water contains two parts of hydrogen and one part of oxygen.

Symbol: H

Atomic mass: 1.00784 u

Atomic number: 1

Named by: Antoine Lavoisier (1783)

Explanation

Altimeters:

Function:

It primarily measures altitude by detecting changes in atmospheric pressure. 

Aviation use:

Pilots heavily rely on altimeters to determine their aircraft's height above sea level during flight. 

Types:

There are different types of altimeters including pressure altimeters and radio altimeters. 

Explanation

A leap year occurs almost every four years to keep our calendar aligned with the Earth's orbit around the Sun.

The extra day, February 29th, is added to account for the fact that the Earth's orbit takes approximately 365.25 days.

Explanation

Raja Aziz Bhatti was awarded the Nishan-e-Haider (Lit.: Emblem of Lion) for his actions of valor during the Battle of Burki in the Indo-Pak War of 1965.

Major Raja Aziz Bhatti was the 1st PMA long course holder who also received the Sword of Honor and Norman medal

while 

Nishan-e-Haider's First award: Muhammad Sarwar

Nishan-e-Haider's Last award: Havildar Lalak Jan

Explanation

• Light travels in a straight line.
• It is also known as a rectilinear path.
• It in a homogeneous medium like air or vacuum.

Explanation

Noticeable means easily seen or observed.

Visible is a direct synonym, meaning able to be seen.

Noticeable means آسانی سے دیکھا یا مشاہدہ کیا

Visible means دیکھنے کے قابل

Prominent means باہر کھڑا یا آسانی سے قابل دید

Explanation

Explanation

72 beats per minute is a good heart rate.

Complete answer:

The resting person usually has a pulse rate between 70 (beats per minute) and 80 (beats per minute).

Your risk of dying from a heart attack is lower if your heart rate is below 80 beats per minute.

A normal resting heart rate ranges from 60 to 100 beats per minute.

Explanation

Explanation

Cairo, is the capital of Egypt.

It is known as the Pyramid City.

Because of its proximity to the Great Pyramids of Giza, one of the Seven Wonders of the Ancient World.