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A. sand clock d. water clockd. Quartz crystals1. The measurement of small time intervals became possible with the development ofb. SundialC. pendulum clock2. The regular vibrations of which of the following electrically driven crystals are used for measuring timevery accurately?a. Calcite crystalsb. Quadric crystals c. Chrome crystals3. The clocks and watches which are used for measuring time are based on:a. rectilinear motionb. circular motionC. periodic motion4. The sundial is a device for measuring:a. speedb. distancec. timed. height5. Which among the following is the smallest unit of time?a. Secondb. MilleniumC. Nanosecondd. Microsecondd. rotational motion |
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