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

• Force is defined as the rate of change of linear momentum with respect to time.
• According to Newton’s second law, force causes a change in an object’s momentum.

Last verified on 25-10-2026

Explanation

Cocci are bacteria with a round or oval shape.

Examples: Staphylococcus, Streptococcus.

Explanation

• The liver is an accessory organ of the digestive system. Food does not pass through it.
• The liver produces bile, which helps emulsify fats into smaller droplets for easier digestion.
• The gallbladder stores and concentrates bile, releasing it into the small intestine when needed.

Last verified on 25-10-2026

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