Damage may be a result of the direct effects of alcohol on the brain or may result indirectly, from a poor general health status or from severe liver disease. For example, thiamine deficiency is a common occurrence in people with alcoholism and results from poor overall nutrition.
In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction. On the diagram above, the distance from point A to point C or from point B to point D would be representative of the wavelength.
To find the wavelength use v = l so l = v/f For 20 Hz, l = v/f = 17.15 m For 20,000 Hz, l = v/f = 0.01715 m For 10 MHz (10 x 106 Hz), l = v/f = 0.0000343 m = 3.43 x 10-5 m (Table of contents). 5. A person sees a heavy stone strike the concrete pavement.