Tuning fork

Diagram shows two identical tuning forks, X and Y, which are placed side by side. Tuning fork X is struck to vibrate. Tuning fork Y then vibrates too.
Rajah menunjukkan dua tala bunyi yang serupa, X dan Y, diletakkan bersebelahan. Tala bunyi X diketuk supaya bergetar. Tala bunyi Y kemudian turut bergetar.

This effect is known as

A pitch

B damping

C resonance

D oscillation

Pendulum B and E have the same length of string will oscillate at equal amplitude

Answer: C