Why cannot we use sandclock to measure time of day
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nowadays we cannot use sand clock to measure time of the day because there is an electric watch for timinng .p and many type of the watch is available for us but sand clock is also watch but it is old model.
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Theoretically we can but this will need that a person/mechanism is there to reset the timer by inverting the clock every-time sand is completely transferred. Also during each inversion few seconds will be lost which over time may result in delay of hours or even days. One more problem that is present is that considering an hour sand clock there is no way to measure seconds or minutes. So even if theoretically it can be done, practically it is not feasible.
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