Explanation

• An electric generator is a device that converts mechanical energy into usable electrical energy.
• This process is based on the principle of electromagnetic induction.
• Discovered in 1831 by British scientist Michael Faraday.

Last verified on 27-04-2026

Explanation

• BTU stands for British Thermal Unit.
• It is a unit used to measure energy.
• It is commonly used in heating and air conditioning systems.
• It shows how much heat is needed to raise water temperature.
• 1 BTU ≈ 1055 Joules.

Last verified on 27-04-2026

Explanation

Explanation

• Meteorology is the scientific study of the atmosphere, especially weather and climate.
• It involves forecasting and understanding atmospheric phenomena.
• Meteorology is a branch of the atmospheric sciences.
• Metrology is the scientific study of measurement.

Last verified on 03-04-2026

Explanation

• Polarized glass reduces glare from sunlight.
• It works by filtering light waves in one direction.
• This reduces the intensity of reflected light.
• It improves visibility and protects eyes.
• That is why it is used in sunglasses.

Last verified on 26-04-2026

Explanation

• Eccrine sweat glands help regulate body temperature.
• They are most densely found on palms and soles.
• These glands produce watery sweat for cooling.
• They are active throughout the body, especially in these areas.
• This helps maintain body temperature balance.

Last verified on 26-04-2026

Explanation

• Evaporation is the process of liquid changing into vapor.
• During this process, heat is absorbed from the surroundings.
• This causes a drop in temperature (cooling effect).
• That is why sweating cools the human body.
• Evaporation is a natural cooling phenomenon.

Last verified on 26-04-2026

Explanation

• Whales evolved from land-dwelling mammals.
• Their ancestors gradually adapted to aquatic life.
• Over millions of years, they moved from land to sea.
• They developed flippers instead of legs for swimming.
• This is an example of evolution and adaptation.

Last verified on 26-04-2026

Explanation

• Rear view mirrors in vehicles are convex mirrors.
• They give a wider field of view.
• Images formed are virtual, upright, and smaller.
• This helps drivers see more traffic behind them.
• It is a curved mirror that bulges outward.
• It is commonly used in side mirrors of cars, buses, and motorcycles.

Last verified 26-04-2026

Explanation

• Succus entericus is the digestive juice of the small intestine (ileum).
• It helps in the final digestion of food.
• It contains enzymes that break down nutrients.
• It completes the digestion process in the intestine.
• It is also called intestinal juice.

Last verified on 26-04-2026