Explanation

• Magnifying power has no unit because it is a ratio.
• It compares image size to object size.
• Since both are lengths, units cancel out.
• It only shows how many times an object is magnified.

Last verified on 17-06-2026

Explanation

• The dimension of viscosity is [ML⁻¹T⁻¹].
• Viscosity measures a fluid’s resistance to flow.
• Higher viscosity means thicker fluid (like honey).
• Lower viscosity means thinner fluid (like water).

Last verified on 17-06-2026

Explanation

• Power is a scalar quantity because it has only magnitude.
• Power describes the rate of doing work in physics.
• It is measured in watts (W).

Additional information:

• Scalar quantities include: mass, time, temperature, energy.
• Vector quantities include: displacement, velocity, acceleration, force.

Last verified on 17-06-2026

Explanation

• Open vacuum tube is best for studying gas flow.
• It allows gas to enter and move inside the tube.
• Gas flow can be observed due to pressure difference.

Last verified on 17-06-2026

Explanation

• Low density liquid vaporizes first.
• Liquids with low density usually have weaker intermolecular forces.
• Weaker forces allow molecules to escape easily as vapor.
• High density liquids have stronger attraction and evaporate slowly.

Last verified 17-06-2026