Write Kelvin-Planck statement for second law of thermodynamics.

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept**:
- The Kelvin-Planck statement is a fundamental principle of thermodynamics that relates to the second law. It addresses the impossibility of creating a perpetual motion machine of the second kind.

2. **Defining a Hot Reservoir**:
- Consider a hot reservoir that maintains a constant temperature. This reservoir can supply heat (Q) to a system without changing its temperature, indicating it is large enough to absorb heat without significant temperature change.

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