it is a PULSE
consumerism
the rise of unemployment was because of the great depression because the owners didn't need workers when the stock market crashed.
The "trough".
Amplitude measures the rise and fall of the wave, i.e. peak to peak
wave
The Great Depression and World War 1 unresolved issues contributed to the rise of the dictators of Mussolini, Hitler, and Franco.
The frequency of a sound wave is the characteristic of the wave that gives rise to the sensation of pitch, assuming that the wave is not so complex that it is perceived as white noise.
During a single period a wave travels just one wavelength.
Depending on height at origin as it approaches the coastal shelf it will rise and increase the strength of the wave. for example a wave 50ft high approaching the atlantic coastal shelf could rise to 150-200 feet with disastrious ramifications.
Yeaa
Depression