Explanation

• Stellar parallax is the apparent shift in the position of a nearby star as Earth moves around the Sun.
• It occurs because the star is observed from different positions in Earth's orbit.
• Astronomers use parallax to measure distances to relatively nearby stars.
• The greater the parallax, the closer the star is to Earth.

Last verified on 05-09-2026

Explanation

• Pressure cookers cook food faster due to Gay-Lussac’s Law.
• This law states that pressure increases when temperature increases in a closed container.
• In a pressure cooker, steam is trapped, increasing pressure.
• Higher pressure raises the boiling point of water above 100°C.
• Food cooks at a higher temperature, so it cooks faster.

Last verified on 14-06-2026

Explanation

• Dalton’s Law of Partial Pressures was proposed by John Dalton.
• It states that the total pressure of a gas mixture equals the sum of the partial pressures of individual gases.
• Formula: Pₜ = P₁ + P₂ + P₃ + …
• It applies to non-reacting gases under suitable conditions.

Last verified on 05-09-2026

Explanation

• Sir Isaac Newton formulated the Three Laws of Motion.
• He presented them in 1687 in his famous work Principia Mathematica.

Three Laws of Motion:

1. First Law — Law of Inertia: An object remains at rest or in uniform motion unless acted upon by an external force.
2. Second Law — Law of Acceleration: The net force on an object is related to its mass and acceleration.
3. Third Law — Action and Reaction: For every action, there is an equal and opposite reaction.

Last verified on 05-09-2026

Explanation

• USB stands for Universal Serial Bus.
• USB is a standard used to connect and transfer data between electronic devices.
• A USB flash drive is a data storage device that uses flash memory with an integrated USB interface.
• Ajay Bhatt is widely credited as a key figure in the development of USB technology in the 1990s.

Last verified on 05-09-2026