State three uses of a vernier callipers.

Explanation

**Step-by-Step Text Solution:**

1. **Measurement of Internal Diameter**: Vernier calipers are commonly used to measure the internal diameter of tubes or cylindrical objects. This is important in various engineering and manufacturing applications where precise measurements are required.

2. **Measurement of Length**: Another significant use of vernier calipers is to measure the length of an object. This can include anything from small components to larger items, ensuring accuracy in dimensions.

3. **Measurement of Depth**: Vernier calipers can also be utilized to measure the depth of containers, such as beakers or bottles. This is particularly useful in laboratory settings where knowing the depth of liquids or materials is essential.