A person carries an air-tight box and a bird sits in it If the bird flies inside, what happens to the weight of of the box?

Explanation

To solve the question regarding what happens to the weight of an air-tight box when a bird flies inside it, we can break it down into a series of logical steps:

### Step-by-Step Solution:

1. **Understand the System**:
- We have an air-tight box and a bird inside it. The box is sealed, meaning no air can enter or leave.

2. **Identify the Components of Weight**:
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