Stopwatch

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Contributed by CHONG YEOK MEE ROSALIND


Present Situation:

Stopwatches in Biology labs frequently come in contact with salt solutions or water when used. Many were malfunctioned.

Improvement:

These stopwatches are dismantled for cleaning or drying. Contact points are sandpapered, as they are oxidised, to ensure good electric connection. In this way, it prolongs the lifespan of stopwatches and save costs.



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