Speed, wavelength, frequency, period, amplitude, intensity.
They are measured on the Richter scale.
Your brain waves are measured.
Earthquake waves (seismic waves) are measured using a seismograph or seismometer.
Answer is by sound waves
googoe
Its frequency.
The frequency of electromagnetic waves is measured in hertz (Hz), where 1 Hz equals one cycle per second.
It is measured in Hertz (Hz).
measured by a ruler lol
waves are measured in Joules
all solid things could be measured
Intensity