Complete the following sentence: The conversion of part of energy into an undesirable form is called ……..

Explanation

To complete the sentence "The conversion of part of energy into an undesirable form is called ……..", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Energy Conversion**:
- Energy can be transformed from one form to another, such as from chemical energy in fuel to thermal energy when burning.

2. **Identifying Undesirable Forms**:
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