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Calculate speed of a vehicle using frequency and the speed of sound?
Wiki User
∙ 14y ago
C = F1/F2
F1 - higher - frequency before vehicle pass (Hz)
F2 - lower - frequency after vehicle pass* (Hz)
V = - V0 * ( (1 - C) / (1 + C) )
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V - speed of vehicle (m/s)
V0 - speed of sound in air (m/s) ~= 343 m/s
Valid only if vehicle speed is lower than the speed of sound :)
* Measurement must be done in position very close to where vehicle passes by.
Otherwise things become more complex.
Wiki User
∙ 14y ago
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Does the speed of sound independent of frequency?
It is independent of frequency.
Does sound velocity change based upon sound frequency?
Speed of sound is not frequency dependent. Speed of sound is dependent only on the temperature. At 20°C the speed of sound is 343 m/s.
How does the frequency of a sound wave affect the speed at which the sound wave moves?
Frequency and speed of propagation of the wave are independent of one another. The medium determines the speed of propagation.
What two variables are needed to calculate the speed of sound?
Distance-wavelength lambda (λ) is measured in meters (m)Time- frequency is measured in Hertz (Hz)
What are the characteristic of sounds?
frequency,wavelength,amplitude,sound pressure,sound intensity,speed of sound,and direction
What is the period of a sound wave whose wave length is 20.0 m?
You solve this as follows: 1) Decide on a number for the speed of sound. Note that the speed of sound in air is quite different to the speed of sound in water, for example. Convert this speed to meters/second, if it isn't already in meters/second. 2) Divide the speed by the wavelength, to get the frequency. 3) The period is simply the reciprocal of the frequency.
How do you calculate speed when the frequency and wavelength are given?
speed=frequency x wavelenth xD
Does the speed of sound independent of frequency?
It is independent of frequency.
Does sound velocity change based upon sound frequency?
Speed of sound is not frequency dependent. Speed of sound is dependent only on the temperature. At 20°C the speed of sound is 343 m/s.
What is the difference between the frequency and the speed of a sound?
Frequency is the number of cycles per second. Sound has frequency. The speed of sound is the distance traveled during a unit of time. 768 mph.
How do you calculate the speed of waves?
Speed = Wavelength X Frequency
How do you calculate the waves speed?
Speed = Wavelength X Frequency
How do you calculate light wavelength to frequency?
To find (wavelength): Divide (speed) by (frequency). To find (frequency): Divide (speed) by (wavelength).
What is the speed of sound vibrations?
Frequency
How do you calculate the wavelength of frequency?
Wavelength = (speed of the wave) divided by (frequency)
How does the frequency of a sound wave affect the speed at which the sound wave moves?
Frequency and speed of propagation of the wave are independent of one another. The medium determines the speed of propagation.
How to calculate the frequency of an electromagnetic wave you need to know the speed of the wave and its?
You need to know it speed, wavelenght and its frequency.
