In rainy season, on a clear night the black seat of a bicycle becomes wet because

Options

A. it absorbs water vapour
B. black seat is good absorber of heat
C. black seat is good radiator of heat energy
D. none of the abvoe

Answer

To solve the question of why the black seat of a bicycle becomes wet during a clear night in the rainy season, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Environment**:
- During the rainy season, the air contains a high moisture content. This means there are a lot of water vapor molecules present in the air.

2. **Properties of Black Color**:
- The bicycle seat is black in color. Black surfaces are known to be good radiators of heat. This means that they can effectively lose heat to the surrounding environment.

3. **Heat Radiation**:
- On a clear night, the black bicycle seat radiates heat into the atmosphere. As it loses heat, the temperature of the seat decreases.

4. **Condensation Process**:
- Due to the high moisture content in the air, as the temperature of the bicycle seat drops, the nearby water vapor molecules lose energy and condense into liquid water on the surface of the seat.

5. **Result**:
- This condensation results in the black seat of the bicycle becoming wet. The moisture from the air accumulates on the cooler surface of the seat.

6. **Conclusion**:
- Therefore, the black seat of the bicycle becomes wet due to the condensation of moisture from the air, which occurs because the seat radiates heat effectively and cools down during the night.

### Final Answer:
The black seat of a bicycle becomes wet during a clear night in the rainy season because it radiates heat effectively, causing nearby moisture in the air to condense on its surface.

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