Given below are some eamples of wave motion. State in each case, if the wave motino is transverse, longitudinal or a combination of both?
(i) Motion of a kink in a long coil spring produced by displacing one end of spring side ways.
(ii) Waves produed in a cylinder containing a liquid by moving its piston back and forth.
(iii) Waves produed by a motor boat sailing in water.
(iv) Light waves travelling from sun to earth.
(v) ultrasonic waves in air produced by a vibrating quartz crystal.

Explanation

To determine the type of wave motion for each example provided, we will analyze the characteristics of the wave motion in each case. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Example (i)**: Motion of a kink in a long coil spring produced by displacing one end of the spring sideways.
- **Analysis**: When one end of the spring is displaced sideways, the kink moves up and down while the wave travels along the length of the spring. The direction of particle motion (up and down) is perpendicular to the direction of wave propagation (along the spring).
- **Conclusion**: This is a **transverse wave**.

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