STOP WATCH
Ø We use a stopwatch for measurement of time, on our laboratories.
Ø It has two hands M and S,
Ø ‘M’ is for minutes and ‘S’ coincide with position of zero.
Ø The button ‘B’ is pressed and released for recording the time
interval between the starts and stop of the event.
Ø By pressing and releasing button, the needle of stopwatch returned
at zero and ready for next fresh reading.
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