What is the precision of a digital scale (±0.1g) and a ruler with a 10 mm scale, considering measurement recording?

here are the solutions to the problems.

Instrument Precision:

• Digital scale: $\pm 0.1$ g
• Ruler (10 mm scale): A 10 mm scale means the smallest marked division is 10 mm or 1 cm. The precision is typically half of the smallest division, so $\pm 0.5$ cm. However, the measurements are recorded to one decimal place (e.g., 3.9 cm), implying a reading precision of $\pm 0.1$ cm. For this problem, we will use the reading precision of $\pm 0.1$ cm, as it is consistent with the recorded data.

**A. Average values for mass,