Explanation

• The rate of change in displacement is referred to as velocity.
• The velocity of an object generally changes during its motion.
• The change in position is known as displacement.
• The maximum displacement from the mean position is called amplitude.

Last verified on 26-10-2026

Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

Explanation

μ = Frictional Force / Normal Force

μ = Newton / Newton

Newton cancels, so it has no unit. It is dimensionless.

Last verified on 26-10-2026

Explanation

• Frequency is the number of occurrences of a repeating event per unit of time.
• The SI unit of frequency is the hertz (Hz).
• 1 Hz = 1 cycle or vibration per second
• Unit: Hz = s⁻¹ (per second)
• Named after physicist Heinrich Hertz
• Used for waves, oscillations, sound, and electromagnetic radiation
• Derivations from other quantities: f = 1 / T
• Dimension T^−1

Explanation

• Density is the mass per unit volume of a substance.
• Density is calculated by dividing the mass of a substance by its volume.
• The SI unit of density is kilogram per cubic metre (kg/m³).

Last verified on 25-10-2026

Explanation

Oxidation is the chemical process of:

• Losing electrons
• Oxidation state increases
• Always paired with reduction (together form redox)
• Reducing agent gets oxidized (it gives up the electrons)

Additional information 

Reduction:

• Gain electrons
• Oxidation state lowers
• Always paired with oxidation (redox)
• Oxidizing agent gets reduced

Last verified on 22-10-2026

Explanation

• Al-Tauba does not begin with Bismillah.
• It is known by two names - At-Taubah and Al-Baraat.
• Surah Tauba is in 10 Parah.
• The number of Rukus in Surah Tauba is 16.
  
  
  

Additional information:

• Bismillah is repeated in the Holy Quran 114 Times.
• Surah Naml surah of the Holy Quran has Bismillah twice.

Last verified on 01-04-2026

Explanation

• Sublimation is the process in which a solid directly changes into a gas without passing through a liquid phase.
• This endothermic phase transition
• Occurs when a substance absorbs enough energy to overcome intermolecular forces.
• Deposition: Gas to Solid (the reverse process).
• Examples: Dry ice, iodine, frost/snow.

Explanation

Explanation

• The Taj Mahal was built by the Mughal emperor Shah Jahan
• In memory of his beloved wife, Mumtaz Mahal.
•  Located in the city of Agra 
• State: Uttar Pradesh
• River: Yamuna River
• Construction Started: 1632
• Construction Completed: 1647
• Height: Approximately 73 meters
• Architecture: Ustad Ahmad Lahori
• Material: Mainly white marble