Frequency

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A volume may be the quantity of oscillations in a present in alternating current each minute, often expressed in hertz. Or even the term frequency could also reference the quantity of rounds an audio wave goes down and up.

If a current completes one cycle per second, then the frequency is 1 Hz; 60 cycles per second equals 60 Hz (the standard alternating-current utility frequency in some countries).

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The computer mouse as we know it today was invented and developed by Douglas Engelbart, with the assistance of Bill English, during the 1960’s and was patented on November 17, 1970