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Explanation

Group O can donate red blood cells to anybody.

It's the universal donor.

Group kind O negative blood is occasionally called the generic blood donor type.

Only 7% of the population is O negative.

 ND23-4-2023

Explanation

The lifespan of a red blood cell is around 120 days.

Blood cells are made in the bone marrow.

Explanation

A deficiency of Vitamin D results in Rickets in children and osteomalacia in adults.

A deficiency of Vitamin D also causes:

• Bone Pain
• Weak Bones
•  Skeletal Deformities.

Sunlight is a good source of Vitamin D.

 Additional Information:

Vitamin A deficiency causes night blindness

Vitamin C deficiency causes scurvy 

Vitamin B (B7) deficiency causes hair fall

SH10-8-2023AGM 28.02.28ND16112023

Explanation

Nitrous oxide, commonly known as laughing gas.

It is a chemical compound, an oxide of nitrogen with the formula N. O.

At room temperature, it is a non-flammable gas, with a slight metallic scent and taste.

Explanation

Most abundant element in Earth crust is Oxygen.

Oxygen in the crust is (46.1%).

The chemical formula of oxygen (dioxygen) is O2.

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List of 10 Most Abundant Elements in the Earth's Crust

Explanation

The hardest substance in the world is diamond.

Its hardness is due to the strong covalent bonding between its carbon atoms.

This making it the most resistant to scratching.

Category: Native minerals

Cleavage: 111 (perfect in four directions)

Crystal class: Hexoctahedral (m3m); H-M symbol: (4/m 3 2/m)

Crystal habit: Octahedral

Crystal system: Cubic

Dana classification: 1.3.6.1

Density: 3.5–3.53 g/cm3 3500–3530 kg/m3

Explanation

The hertz is the unit of frequency of one cycle per second. 

 symbol: hertz (Hz)

Hertz in honor of the German physicist Heinrich Hertz

hertz in the International System of Units (SI)

frequency is defined as one cycle per second

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Explanation

The Sun is a star.

There are lots of stars, but the Sun is the closest one to Earth.

It is the center of our solar system.

The Sun is a hot ball of glowing gases.

The sun is composed of layers made up almost entirely of hydrogen and helium.

Explanation

• Mars is referred to as the Red Planet.
• It has rivers, streams, lakes, and oceans.
• It has the largest volcano Olympus Mons.
• It has two moons; Deimos and Phobos.

Explanation

The coulomb, also written as its abbreviation 'C', is the SI unit for electric charge.

One coulomb is equal to the amount of charge from a current of one ampere flowing for one second.

One coulomb is equal to the charge on 6.241 x 1018 protons.

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