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5/13 MCQs for:
WAVES: Sound

The fundamental note produced by a closed pipe in a piano is 128 Hz.

What is the wavelength of its first overtone?

A small vibrating object on the surface of a ripple tank produces waves of frequency 20 Hz and speed 60 cm/s. If the source S is moving to the right as shown the figure, with a speed of 20 cm/s.

What frequency would an observer at point C hear?

Consider the standing wave on a guitar string and the sound wave generated by the guitar as a result of this vibration. What do these two waves have in common?

Sound vibrations with frequencies greater than 20,000 Hz are called:

You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity level of the sound? It drops by: