Problem: Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s due to human reaction time at the start and stop moments. What is the percent uncertainty of a hand-timed measurement of(a) 6 s(b) 60 s(c) 6 min

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Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 due to human reaction time at the start and stop moments. What is the percent uncertainty of a hand-timed measurement of
(a) 6 s
(b) 60 s
(c) 6 min

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