Explanation

Waves produced by oscillation of material particles require a medium to travel, called mechanical waves.

Examples include sound waves and water waves.

Explanation

KE = 1/2mv²

Given m = 0.03 kg, v = 400 m/s

KE = 1/2 × 0.03 × 400 × 400

= 1/2 × 0.03 × 160000

= 1/2 × 4800

= 2400 J

Explanation

Extrapolation is the process of estimating a value outside the range of known data points.

In contrast, interpolation refers to estimating a value within the known range.

Explanation

The turns ratio of a transformer is given by:

n = N₂ / N₁ = V₂ / V₁

Where:

- n is the turns ratio

- N₁ and N₂ are the number of turns in the primary and secondary coils

- V₁ and V₂ are the primary and secondary voltages

Given n = 5:

V₂ / V₁ = 5

This means the secondary voltage is greater than the primary voltage by a factor of 5.

Explanation

Regression is a defense mechanism where a person reverts to earlier behaviors or emotional states in response to stress or anxiety.

Recalling traumatic events like crashes may trigger such a regression to a more childlike state of coping.

Explanation

Certain and Unsure are opposites.

Hard and Soft are also opposites, so this analogy fits the pattern.

Explanation

The phrase "came off" means something got detached or separated from its place.

Correct sentence: The handle of my bicycle suddenly came off. It is in my hands now.

Explanation

The discovery method encourages students to investigate, explore, and find information on their own.

It promotes deep understanding and active engagement with the content.

Explanation

Quaid-e-Azam Muhammad Ali Jinnah donated one-third of his property to Islamia College Peshawar.

This act reflected his strong support for education and the role of the college in Pakistan’s movement.

Explanation

A switch operates at the Data Link Layer (Layer 2) of the OSI model.

It uses MAC addresses to forward data frames within a local network.