1. There both similar because both refer to the quality of a measurement.
2. Both come out to an exact measurement but a triple beam balance is accurate and precise and the electronic balance is accurate but not precise.
3. All numbers before or including the zero if it has a decimal after or before or it has a repeating sign. Example; 122.01 has 5 sig figs or 122 has 3 sig figs.
4. 2 Liters of water is about 2,000mm
5. How to measure volume I never truly understood that. Also how to read a triple beam balance and how to use and read the calipers.
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