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In Chemistry / Senior High School | 2025-05-15

You are measuring the length of a metal rod using a ruler marked in millimeters. The rod extends slightly beyond the 50 mm mark, and you estimate it to be at approximately 50.6 mm. How many significant figures are in your measurement?

Asked by arrabida7

Answer (1)

Here's why:5 is significant.0 is significant (since it's between two significant digits).6 is significant (the estimated digit, which adds precision).When using a ruler marked in millimetres:You can read to the nearest millimetre.You may estimate one more digit (tenths of a millimetre) — this estimated digit is still considered significant.So, 50.6 mm includes:Two certain digits (5 and 0),One estimated digit (6),→ Total = 3 significant figures.

Answered by jerryzhang0223 | 2025-05-15

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