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.
The distance formula is derived from the Pythagorean theorem. Distance between two points in a plane is calculated with the 2 coordinates (x1, y1) and (x2,y2). Draw a right angled triangle with the line formed by the points. The distance between the two points can be calculated by finding the horizontal (x2 - x1) and vertical distances (y2 - y1). Enter the coordinate values into this online Distance Between Two Points Calculator and find the length between the two points.