Select the scalars and vectors from the following: Velocity, distance, acceleration, work, mass, retardation.

Explanation

To classify the quantities as scalars or vectors, we need to understand the definitions of each:

1. **Scalars**: Quantities that have only magnitude (size) and no direction.
2. **Vectors**: Quantities that have both magnitude and direction.

Now, let's analyze each quantity provided in the question:

### Step 1: Analyze Velocity
...