Write two characteristic features of nuclear force.

Explanation

### Step-by-Step Solution:

1. **Identify the Characteristics of Nuclear Force**:
- The first characteristic of nuclear force is that it is a **short-range force**.
- The second characteristic of nuclear force is that it is **independent of charge**.

2. **Explain the Short-Range Nature**:
- Nuclear forces operate within a very small range, approximately **10^-15 meters** (or 1 Fermi). This means that they are effective only at distances comparable to the size of atomic nuclei.
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