Explanation

The SI unit of momentum is kg·m/s (or N·s). In brief:

• Definition: Momentum is the product of mass and velocity (p = mv).
• Formula: p = mv
• Vector: has magnitude and direction
• Conservation: constant in closed systems
• No named unit
• Measured in kilograms (kg) and velocity in meters per second (m/s). 
• The dimensional formula of momentum is:[M L T⁻¹]
• Momentum is the product of an object’s mass and its velocity → Momentum = Mass × Velocity.
• It is a vector quantity.

Explanation

• Battery is a device that converts chemical energy into electrical energy.
• Batteries work by using a galvanic cell.
• It is an electrochemical device made up of two electrodes and an electrolyte solution.

Last verified on 16-03-2026

Explanation

• The instrument used to measure temperature is called a thermometer.
• A thermometer shows how hot or cold an object or place is.

Additional information:

• Barometer measures air pressure.
• Hygrometer measures humidity (moisture in air).

Last verified on 16-06-2026

Explanation

• The poles experience six months of the day and six months of the night.
• This is since earth is tilted on its axis.
• Also, due to this, each pole is tilted towards and away from the sun for about six months.
• When the North Pole is tilted towards the sun, it has continuous daylight.

Last updated 08 Nov 2026 by NA

Explanation

• Cartography is the science and art of creating maps to represent geographical areas.
• It includes designing, drawing, and interpreting maps for navigation and study.

Last updated 06 Nov 2026 by NA