period (T) is simply one divided by frequency (f) or T = 1/f. Frequency is cycles per second and period is the time it takes to complete one cycle. For example frequency of 10 cycles per second has a period of 0.1 second
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the period is 1/60 s or 0.017s and the frequency is 60Hz
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Frequency, measured, musically speaking, in Hertz, is the number of "cycles per second" in a single wave. A sound travelling at the frequency of 440 Hertz (440 cycles per second) produces a note of A, known as concert pitch.
Given that the A above middle C has a frequency of 440 hertz, the lowest note on a regular piano has a frequency, rounded to two decimal places, of 27.50 hertz. Taking this an octave further down gives a frequency of 13.75, too low for a human ear to hear. Descending ten semitones, to two Bs below the bottom end of a piano, gives a frequency approximately equal to 13.75/(2^(1/12)10) = 7.72 Hertz, the closest genuine note to a 7.8 hertz frequency.
yes, they were both during the 1960s, but the beatles broke up in 1970 and the hippie movement continued into the 70s