Explanation

• Honey has the maximum viscosity.
• Viscosity means resistance to flow.
• Honey flows very slowly due to high internal friction.

Last verified on 17-06-2026

Explanation

Kinetic energy formula = 1/2 × mass × velocity²  

Mass is constant.

If KE doubles, then velocity² must double.  

If velocity² becomes 2 times, velocity becomes √2 times.

So kinetic energy doubles by doubling √2 × velocity.

Last verified on 17-06-2026

Explanation

• Lenz’s law is based on the law of conservation of energy.
• It states that induced current always opposes the change causing it.
• This opposition prevents creation of energy from nothing.
• It ensures energy is neither created nor destroyed.

Last verified on 17-06-2026

Explanation

• The dimension of velocity is [L T⁻¹].
• Velocity is defined as displacement per unit time.
• It shows how fast and in which direction an object moves.
• It is a vector quantity.
• SI unit of velocity is m/s.

Last verified on 17-06-2026

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

Ammonia reacts with carbon dioxide to form urea.

• 2NH₃ + CO₂ → NH₂COONH₄ → CO(NH₂)₂ + H₂O
• Product: Urea [CO(NH₂)₂]

Urea contains about 46% nitrogen.

• The industrial production of urea was developed by Friedrich Wöhler.

Last verified on 17-06-2026

Explanation

• The retina is the light-sensitive layer located at the back of the human eye.
• It contains special cells called rods and cones that detect light and color.
• These cells convert light into electrical signals.
• The signals are then sent to the brain through the optic nerve to produce vision.

Last verified on 11-03-2026

Explanation

• Density is the reciprocal of specific volume.
• Density tells how much mass is in a given volume.
• Specific volume tells how much volume is occupied by unit mass.

Last verified on 16-06-2026

Explanation

• A junction in an electrical circuit is called a node.
• A node is a point where two or more circuit elements meet.
• Current entering a node equals current leaving it (Kirchhoff’s Law).

Last verified on 16-06-2026

Explanation

• The atmosphere is an open system.
• Because it exchanges both matter and energy with surroundings.
• Gases like oxygen, carbon dioxide, and water vapour continuously move in and out.
• Energy from the Sun enters and heat is also released back into space.
• This continuous exchange keeps atmospheric processes active.

Last verified on 16-06-2026