Reading Significant Figures from 10/100mL Test Tubes

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To read significant figures from 10mL and 100mL test tubes, it's important to consider the increments marked on the tubes. For a 10mL test tube, which is incremented by 0.1mL, measuring 8mL at the meniscus level should be reported as 8.00mL. This reflects the known precision of the measurement, with the first two figures being certain and the third being an estimate. The discussion emphasizes the importance of estimating the last digit based on the increments available. Accurate reporting of measurements ensures clarity and precision in scientific communication.
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I have a question about how to read the correct significant figures from an 10mL and 100mL test tube. The 10mL test tube is incrimented by .1. So for example if i measure something that was 8mL at the meniscus level would it be correct to state this result as 8.000mL , 8.00mL, 8.0mL, or 8mL? I'm confused.
 
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I think you should go with 8.00 mL.

You know that it's somewhere between 8.0 and 8.1 (because it goes up by those increments), so there are your first two significant figures. Then, the third one is an estimate.
 

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