Frequency is how often something happens.
Gamma Rays
frequencey
A frequency diagram.
To measure sounds frequency you have to do a sound test.
The hertz (Hz) is commonly used. Its dimensions are 1/second.
Frequency = (speed)/(wavelength) = 10/20 = 1/2
The Doppler effect is a change of the frequencey of a wave, due to relative movement between source and observer.
Rechargable battery life willd epend on the device in which they are used and the frequencey in which they are charged.
Visible light has lower frequency / longer wavelength than x-rays.
It depends where you are in the world. In North America the most common used voltage is 120/240 and the frequency is 60 Hertz.
Increasing the wave speed will not affect the frequency of the wave. The frequency of a wave is determined by the source of the wave and will remain constant regardless of the wave speed.
The length of a radio wave at 900 kHz is 3331/3 meters, or about 1093.6 feet.