Explanation

• Isobars are atoms of different elements.
• They have same mass number but different atomic number.
• They show different chemical properties but same nuclear mass.
• Example: Argon-40 and Calcium-40 both have mass number 40 but different atomic numbers.

Last verified on 07-05-2026

Explanation

• The nucleus is the control center of the cell.
• It regulates all vital activities like growth, reproduction, and metabolism.
• It contains genetic material (DNA).
• Ribosomes make proteins, and cytoplasm supports cell structure.

Last verified on 04-05-2026

Explanation

Composition of Air:

• Nitrogen → 78%
• Oxygen → 20.95%
• Argon → 0.93%
• Carbon dioxide → 0.04%
• Other gases → very small traces

Last verified on 30-04-2026

Explanation

• QR stands for Quick Response
• A QR code is a two-dimensional square barcode.
• It stores data like website links, text, or payment details

Last updated 07-09-2026 by NA

Explanation

• Refractive index shows how much light bends when entering a medium.
• Glass is a transparent solid with moderate optical density.
• Its refractive index is a standard value used in physics experiments.
• It is greater than water and less than diamond.
• So, the commonly accepted value for glass is around 1.5.

Last verified on 12-04-2026

Explanation

• Fission is the process of splitting an atomic nucleus into smaller nuclei, releasing a large amount of energy.
• It is used in nuclear power plants and atomic bombs.

Last verified on 12-04-2026

Explanation

In the Fahrenheit scale:

• The freezing point of water is 32°F
• The boiling point of water is 212°F

Last verified on 02-04-2026

Explanation

• Total planets: 8
• Inner planets: Mercury, Venus, Earth, Mars (4)
• Outer planets: Jupiter, Saturn, Uranus, Neptune (4)
• Pluto reclassified: 2006 (IAU decision)
• Largest planet: Jupiter
• Smallest planet: Mercury

Last verified on 01-04-2026

Explanation

• The average adult has a blood volume of about 5 liters (5-6 litres), though this can range from 4.5 to 5.5 liters.
• Male: About 5.5 liters.
• Female: About 4.5 liters.
• Proportion: Blood makes up roughly 7% of a person's total body weight. 

Last verified on 30-03-2026

Explanation

Saturn is the second-largest planet in the solar system.

Ganymede (Moon of Jupiter) is the largest satellite in the solar system.

Planets and Natural Satellites:

• Mercury: 0
• Venus: 0
• Earth: 1 (Moon)
• Mars: 2 (Deimos, Phobos)
• Jupiter: 95
• Saturn: 274
• Uranus: 27

Last verified on 30-03-2026