Final answer:
The statement is true; a pebble dropped in water creates a single disturbance known as a pulse wave, which is a non-periodic waveform.
Step-by-step explanation:
A pulse wave or pulse train is a type of non-sinusoidal waveform that includes square waves (duty cycle of 50%) and similarly periodic but asymmetrical waves (duty cycles other than 50%). It is a term used in synthesizer programming, and is a typical waveform available on many synthesizers. The exact shape of the wave is determined by the duty cycle or pulse width of the oscillator output.
In many synthesizers, the duty cycle can be modulated (pulse-width modulation) for a more dynamic timbre.The statement 'A pebble dropped in water is an example of a pulse wave.' can be considered true. When a pebble is dropped into water, it disturbs the water's surface and creates a single disturbance that travels through the water. This disturbance, which is a single hump or dip that travels through a medium, is characterized as a pulse wave.
In physics, a pulse wave refers to a non-periodic waveform that includes a single pulse or a brief burst of energy. On the other hand, had the statement been about a continuous series of waves generated by something like a vibrating object in the water, it would be considered a periodic wave.