Explanation

In the Fahrenheit scale:

• The boiling point of water is 212°F
• The freezing point of water is 32°F

Additional information:

In the Celsius scale:

• Boiling point of water: 100°C
• Freezing point of water: 0°C

Last verified on 02-04-2026

Explanation

• Jupiter has the fastest rotation of all planets.
• It completing one rotation in about 9 hours 56 minutes.

Additional information:

• Venus has the slowest rotation.
• It taking about 243 Earth days.
• Earth: ~24 hours
• Mars: ~24 hours 37 minutes.

Last verified on 06-10-2026

Explanation

• The correct mathematical form is V = IR.
• Here V = voltage, I = current, R = resistance.
• Ohm’s law states that current is directly proportional to voltage when temperature is constant.
• It describes the relationship between voltage, current, and resistance.

Last verified on 12-04-2026

Explanation

• Mercury is closest to the sun.
• It is mostly made up of iron.
• It's surface covered with craters.
• It has no atmosphere and no moons.
• It's smallest planet.

Last verified on 06-10-2026

Explanation

• Transpiration is the process by which plants lose water vapor through their leaves.
• Water mainly escapes through tiny pores called stomata present on the leaves.
• Transpiration helps in the movement of water and minerals from roots to other parts of the plant.
• It also helps in cooling the plant.

Additional information:

• Absorption → Taking in water and minerals
• Respiration → Releasing energy from food
• Photosynthesis → Preparation of food

Last verified on 05-10-2026

Explanation

• 1 Megawatt (MW) = 1,000,000 watts (W) = 10⁶ W.
• The watt (W) is the SI unit of power.

Additional information:

• 1 kilowatt (kW) = 10³ W
• 1 gigawatt (GW) = 10⁹ W
• 1 watt (W) = 1 W
• 1 milliwatt (mW) = 10⁻³ W

Last verified on 06-10-2026

Explanation

• Photosynthesis is the process by which green plants prepare their food.
• Plants use sunlight, carbon dioxide, and water to produce glucose.
• Chlorophyll absorbs sunlight and helps in the process.
• Oxygen is released as a by-product.

Last verified on 06-10-2026

Explanation

• Common salt is chemically known as sodium chloride (NaCl).
• It is an ionic compound composed of sodium and chloride ions
• Representing a 1:1 ratio of sodium and chloride ions
• Formula: NaCl
• Melting point: 801 °C
• Density: 2.16 g/cm³
• Boiling point: 1,465 °C

Question updated on 11-02-2026

Explanation

• Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis.
• TB bacteria usually attack the lungs, but they can also affect other parts of the body.
• TB may affect the kidneys, spine, and brain.
• Tuberculosis (تپِ دق) is a serious infectious disease that commonly affects the lungs.

Last verified on 06-10-2026

Explanation

• A mixture of salt and sand can be separated by dissolving it in water.
• Salt dissolves in water, while sand remains insoluble.
• The sand can then be separated by filtration.
• Finally, evaporation of the water recovers the dissolved salt.

Last verified on 06-10-2026