The fundamental note produced by a closed pipe in a piano is 128 Hz.
What is the wavelength of its first overtone?
0.52 m.
7.2 m.
2.01 m.
0.72 m.
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?
30 Hz.
13.3 Hz.
60 Hz.
6.7 Hz.
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?
They have the same wavelength.
They have the same frequency.
More than one of the above is true.
They have the same velocity.
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:
