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frequency meter is used to measure the frequency of unknown frequency signal.
Wavelength = (speed)/(frequency)Frequency = 1/periodso wavelength = (speed) x (period)Speed = (20 meter/min) x (1 min/60 sec) = 1/3 meter/secWavelength = (speed) x (period) = (1/3 meter/sec) x (30 sec) = 10 metersThe correct choice is a .
The formula for a wave in this case is: speed = frequency x wavelength. Since Hz = 1/second, the answer will be in meter/second.
Hertz is the unit of frequency and meter the unit of length. Frequency is the number of occurrences of a repeating event per unit time. Length is a measurement of distance or dimension.
Divide the speed by the wavelength. (For any wave, the wavelength times the frequency is equal to the speed of the wave.)