| 21. | Quartz crystals are manufactured for frequencies from a few tens of kilohertz to hundreds of megahertz.
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| 22. | So the first generation watches had low frequencies of a few kilohertz, limiting their accuracy.
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| 23. | When touched horizontally against the center of a tooth it vibrates at 5 kilohertz for one second.
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| 24. | He discovered that the squirrels were making very short screeches at a frequency of about 50 kilohertz.
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| 25. | Poulsen's arc could generate frequencies of up to 200 kilohertz and was patented in 1903.
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| 26. | An external or secondary circuit drives the switching, typically at tens of kilohertz up to several megahertz.
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| 27. | The Armstrong method begins by generating a carrier signal at a very low frequency, say 500 kilohertz.
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| 28. | In 1971 the clockspeed of Intel's original microprocessor, the 4004, was a feeble 100 kilohertz.
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| 29. | They can hear a frequency of up to 91 kHz ( kilohertz ) and send sounds of 70 kHz.
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| 30. | Most FSM's can be driven to several wavelengths of tilt, and at frequencies exceeding one kilohertz.
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