Explanation

• The mass of a proton is approximately 1836 times greater than the mass of an electron.
• A proton is a positively charged particle found in the nucleus of an atom.
• It has almost the same mass as a neutron (slightly less).
• Electrons are much lighter compared to protons.

Last verified on 22-06-2026

Explanation

• The dimension of velocity is [L T⁻¹].
• Velocity is defined as displacement per unit time.
• It shows how fast and in which direction an object moves.
• It is a vector quantity.
• SI unit of velocity is m/s.

Last verified on 17-06-2026

Explanation

• Black Gold: Petroleum (Crude Oil)
• Color: Dark black / brownish black
• Main Uses: Fuel, petrol, diesel, kerosene, plastics
• Importance: Backbone of modern industry and transport

Additional information:

• Top Oil-Producing Countries:
  1. Saudi Arabia
  2. USA
  3. Russia
  4. Iraq
  5. Iran

Last verified on 16-06-2026

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

• Necrophobia is the abnormal fear of death or dead bodies.
• It is a type of specific phobia related to mortality.
• Affected individuals feel extreme anxiety when thinking about death.
• It may also include fear of corpses or funerals.
• It is a psychological anxiety disorder.

Last verified on 10-06-2026