Explanation

• Carbon dioxide (CO₂) — the main greenhouse gas causing global warming.

Additional information:

• Methane (CH₄) — potent, from livestock and fossil fuels.
• Nitrous oxide (N₂O) — from fertilizers and industry.
• Water vapor — natural, amplifies warming.
• Fluorinated gases — synthetic, very strong effect.

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

Explanation

• MRI stands for Magnetic Resonance Imaging.
• It is a medical imaging technique.
• It uses strong magnetic fields and radio waves to create detailed images of organs and tissues.

Last verified on 03-09-2026

Explanation

• Main Cause: Freon / CFCs
• Effect: Breaks down O₃ molecules → more UV-B radiation
• Other Contributors: Halons, carbon tetrachloride
• Result: Skin cancer, cataracts, climate impact

• The Montreal Protocol (1987) aimed to reduce CFC emissions
• Ozone layer protects Earth from harmful ultraviolet rays

Explanation

• The skin is considered the largest organ of the human body.
• It covering an area of about 1.5-2 square meters (16-22 square feet).
• It weighing around 3-4 kilograms (7-9 pounds).

Last verified on 01-09-2026

Explanation

• Traditional walking sticks are commonly made of wood.
• Wood is strong and durable.

Last updated 13 August 2026 by NA

Explanation

• A computer program that translates one program instruction at a time into machine language is called an Interpreter.
• Interpreters are commonly associated with languages such as Python, JavaScript, and BASIC.

Additional information:

• Compiler: Translates the complete program before execution.
• Assembler: Converts assembly language into machine code.
• Machine Language: Uses binary instructions understood directly by the computer.

Last verified on 10-08-2026

Explanation

• The value 332 m/s is measured under standard atmospheric conditions.

Additional information:

• Speed of sound in air at 20°C ≈ 343 m/s.
• Speed of sound is faster in solids than liquids and gases.

Examples:

• Air: ~332 m/s (0°C)
• Water: ~1,480 m/s
• Steel: ~5,100 m/s

Last verified on 21-07-2026

Explanation

• Malaria is caused by the parasite Plasmodium.
• It is transmitted to humans through the bite of an infected female Anopheles mosquito.
• Malaria is a parasitic disease.
• It mainly affects the liver and red blood cells.
• Common symptoms include fever, chills, headache, and sweating.

Last verified on 11-07-2026

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