Which of the following cannot be used for the measurement of time?

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A leaking tap

Simple pendulum

Shadow of an object during the day

Blinking of eyes

answer is A.

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Detailed Solution

A leaking tap cannot be used for the measurement of time.
Here, we can say that the back-and-forth oscillation of a simple pendulum illustrates time. In earlier times, the shadow of an object was used to determine the location of the sun or the time. Also, the eyes blinking is unusual unless reflex motions cause it. So among the given options, only a leaking tap can't be used to measure time as it is impossible to predict when the drop will fall.

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