Explanation

The ampere, symbol A, is the SI unit of electric current.

It is defined by considering the fixed  value of the elementary charge e as 1.602 176 634 x 1019,

where the unit C is equal to As and the second is defined by Δν Cs.

Explanation

When white light passes through a prism, it splits into 7 colors, forming a spectrum known as a rainbow:

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

The separation of visible light into its different colours is known as dispersion.

Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

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

• Approximately 7–8% of an adult’s body weight.
• Approximately 8–9% of a child’s body weight.
• Approximately 9–10% of an infant’s body weight.

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Blood is a body fluid present in animals that consists of plasma, white blood cells, red blood cells, and platelets.

Humans have around 5 liters of blood in their bodies.

The volume of blood is approximately 5.5 liters in each adult male and 4.5 liters in female.

Explanation

• Bile is produced by the liver and stored in the gallbladder.
• It is released into the small intestine to facilitate fat digestion and absorption.
• Bile breaks down fats into smaller particles, making it easier for enzymes to digest them.

Explanation

An ammeter is a device specifically designed to measure electric current (in amperes).

Explanation

• ECG (Electrocardiogram) is a test used to measure the electrical activity of the heart.

It is commonly used for the diagnosis of heart-related ailments, such as:

• Arrhythmias (irregular heart rhythms)
• Coronary artery disease
• Cardiac arrests
• Heart failure

Explanation

We can measure our blood pressure on our own using a digital blood pressure monitor for automated readings or an instrument called a sphygmomanometer for manual readings.

A sphygmomanometer also known as a blood pressure monitor, is a device used to measure blood pressure.