This image shows a ruler with measurements in centimeters. Let's break down the two questions based on the image:

a) Precision of the Measuring Device

The precision refers to the smallest unit of measurement that the device can measure reliably. From the image, the ruler has lines marking every millimeter, so the precision of the device is 1 millimeter (0.1 cm). This means that the ruler can measure up to 1 millimeter accurately.

b) Uncertainty

The uncertainty is typically half the smallest unit of the measuring device. Since the smallest unit on this ruler is 1 millimeter, the uncertainty would be ±0.5 millimeters (or ±0.05 cm).

Let me know if you'd like further explanation or if you have additional questions! Here are some related questions:

1. What is the difference between precision and accuracy in measurements?
2. How can uncertainty affect experimental results?
3. What is the significance of significant figures in measurements?
4. How would you express uncertainty in scientific notation?
5. How can you improve the precision of a measuring device?

Tip: Always consider the smallest unit of measurement on your device when determining precision and uncertainty.