Give three examples for a quantity which has unit, but still dimensionless.

Explanation

To answer the question, we need to provide three examples of quantities that have units but are dimensionless. Let's break this down step by step.

### Step-by-Step Solution:

1. **Understanding Dimensionless Quantities**:
- A dimensionless quantity is one that does not have any physical dimensions (mass, length, time, etc.). Its dimensions can be expressed as \( M^0 L^0 T^0 \), meaning it is independent of the fundamental dimensions.

2. **Example 1: Angular Displacement**:
...