Explanation

Mercury (Hg) is used in thermometers.

Because it expands and contracts consistently with temperature changes.

It providing accurate readings.

It also emits ultraviolet light in fluorescent tubes when electrically excited.

Explanation

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube.

Water freeze at 32 F and boils at 212 F

Explanation

Tooth enamel is the white, visible part of the tooth and it is also the hardest part of the human body.

 The main mineral composition is hydroxyapatite, a crystalline of calcium phosphate.

Explanation

Dr. Abdul Salam received Nobel Prize for combining two forces: 

In 1979,  Dr. Abdul Salam won the Nobel Prize for physics.

He was the second Muslim scientist to get Nobel Prize.

Abdus Salam became the first Pakistani to win a Nobel Prize.

Dr. Abdus Salam was Died: Nov. 21, 1996

In 1952  Ph.D. in theoretical physics from the University of Cambridge

Awards

Copley Medal: 1990

Royal Medal: 1978

Hughes Medal: 1964

Pride of Performance: 1958

Nishan-e-Imtiaz

Adams Prize: 1958

Lomonosov Gold Medal: 1983

Atoms for Peace Award

Gold Medal for Outstanding Contributions to Physics: 1981

Smith's Prize for Essay: 1950

Jožef Stefan Medal: 1980

Cristoforo Colombo Prize: 1992

ND5-07-2023

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

Silicon (Si) is the element most commonly used to fabricate solar cells and transistors.

Silicon is a semiconductor material that is widely used in the production of electronic components, including:

• Solar cells (photovoltaic cells)
• Transistors
• Microprocessors
• Diodes

Explanation

Geographers broadly divide the Earth into three separate climate zones: 

1. Tropical (near the Equator)
2. Temperate (north and south of the Equator)
3. Polar (the farthest Northern and Southern regions)

Explanation

Glucose, a form of sugar, is the primary source of energy for every cell in the body.

Because the brain is so rich in nerve cells, or neurons, it is the most energy-demanding organ, using one-half of all the sugar energy in the body.

Explanation

Neutrons have no electric charge, hence they are neutral.

Protons have a positive charge.

Electrons have a negative charge.

Explanation

Pneumonia is often caused by Streptococcus pneumoniae.

It is a type of bacteria that leads to lung inflammation and infection.

It affecting breathing and oxygen intake.