Explanation

• Humidity means the amount of water vapor in air.
• It is measured using a psychrometer.
• A psychrometer has two thermometers: dry bulb and wet bulb.

Additional information:

• A psychrometer is a type of hygrometer.
• It helps in weather forecasting and climate studies.

Last verified on 12-02-2026

Explanation

Non-renewable energy sources:

• Oil
  
• Nuclear energy
• Petroleum
• Natural gas & coal

Renewable sources of energy:

• Solar energy
• Wind energy
• Hydroelectric power
• Biomass energy
• Geothermal energy
• Tidal energy

Last verified on 11-02-2026

Explanation

• When a school boy uses only one strap, the entire weight of the bag rests on one shoulder.
• This increases pressure and strain on that shoulder compared to using two straps, where the weight is distributed evenly.

Last verified on 10-02-2026

Explanation

• Cooking utensils often have wooden handles because wood does not conduct heat well.
• This prevents burns and makes the utensil safe to hold even when the pot or pan is hot.

Last verified on 10-02-2026

Explanation

• Translatory motion is the motion in which all parts of a body move the same distance in a straight line or along a path.

Examples include:

• Linear motion – straight-line movement
• Vibrational motion – repeated back-and-forth movement along a line
• Oscillatory motion – motion to-and-fro about a fixed point

Rotatory motion involves rotation about an axis, so it is not translatory.

Last verified on 10-02-2026