1 Place the bulgur in a bowl, and cover with water by 1/2 inch. 2  Soak for 20 minutes, until slightly softened. 3  Drain through a cheesecloth-lined strainer, and press the bulgur against the strainer to squeeze out excess water.
Amplitude. Amplitude is a measurement of the vertical distance of the wave from the average. The wave axis is the average height of the wave over one cycle, and is usually considered to be zero. Heights above and below the average are given positive and negative values, respectively. The wave shape shown below is called a sine wave. The maximum and minimum amplitudes of this sine wave are the heights measured from the wave axis (white line) to the top of the wave peak and bottom of the wave trough.
The maximum disturbance, or height of a wave, is called its amplitude. Notice on the diagram that this is the distance from the midline of a wave to the top of a crest or to the bottom of a trough. The distance from a particular point on one wave, to the same point on the next is called the wavelength.