revolve; rotate; go around. Context examples: The Earth revolves around the Sun / The lamb roast rotates on a spit over the fire. Hypernyms (to revolve is one way to...): turn (move around an axis or a center) Troponyms (each of the following is one way to revolve): drive in; screw (cause to penetrate, as with a circular motion) screw (turn like a screw)
In air at normal atmosphere at 0 oC the speed of sound is 331.2 m/s. The wavelength of a 500 Hz tone can be calculated as. Î» = (331.2 m/s) / (500 Hz). = 0.662 m.
The wavelength and the frequency of the sound waves from the police car is the same in all directions. Therefore, observers on any side of the police car would hear the exact same sound. Remember the wave equation, We know the speed of sound in air is 330m/s and the wavelength for the sound waves from the siren are 1m.