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The social welfare system created in the 1930s in order to help the poor and restore trust in capitalism was the
Cycles Per Second
A unit of frequency equivalent to one oscillation or vibration per second, known as Hertz (Hz).
Doppler Shift
A change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave.
Decibels
A unit of measurement used to express the intensity of sound, based on a logarithmic scale.
Loudness
A perceptual measure of the strength or intensity of a sound, often correlated with physical amplitude of the sound waves.
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