A polished metallic piece and a black painted wooden piece are kept in open in bright sun for a long time.

Options

A. a. The wooden piece will absorb less heat than the metallic piece
B. the wooden piece will hae a lower temperature than the metallic piece
C. If touched, the metallic piece will be felt hotter than the wooden piece
D. When the two pieces are removed from the open to a cold room, the wooden piece will loose heat at a faster rate than the metallic piece.

Answer

To solve the problem, we need to analyze the thermal properties of the polished metallic piece and the black painted wooden piece when exposed to sunlight.

### Step-by-Step Solution:

1. **Understanding Absorption of Heat:**
- The polished metallic piece has a shiny surface, which reflects most of the sunlight and does not absorb heat effectively.
- The black painted wooden piece, on the other hand, has a dark surface that absorbs most of the sunlight due to its high absorption coefficient.

**Conclusion:** The wooden piece will absorb more heat than the metallic piece.

**Hint:** Remember that darker surfaces absorb more radiation than lighter ones.

2. **Comparing Temperatures:**
- Since the wooden piece absorbs more heat, its temperature will rise more than that of the metallic piece.
- Therefore, after being in the sun for a long time, the wooden piece will have a higher temperature than the metallic piece.

**Conclusion:** The wooden piece will have a higher temperature than the metallic piece.

**Hint:** Consider how heat absorption affects temperature increase.

3. **Feeling the Temperature:**
- When touched, the metallic piece will feel hotter than the wooden piece. This is because metals have a higher thermal conductivity compared to wood.
- The heat absorbed by the metallic piece will transfer quickly to your skin, making it feel hotter.

**Conclusion:** The metallic piece will be felt hotter than the wooden piece when touched.

**Hint:** Think about how materials conduct heat differently.

4. **Heat Loss in a Cold Room:**
- When both pieces are moved to a cold room, the wooden piece will lose heat faster than the metallic piece.
- The wooden piece acts like a black body, which means it emits heat radiation efficiently. Its emission coefficient is close to 1, allowing it to lose heat rapidly.

**Conclusion:** The wooden piece will lose heat at a faster rate than the metallic piece.

**Hint:** Recall the concept of emissivity and how it relates to heat loss.

### Final Summary:
- The correct statements are:
1. The wooden piece will absorb more heat than the metallic piece.
2. The wooden piece will have a higher temperature than the metallic piece.
3. The metallic piece will feel hotter than the wooden piece when touched.
4. The wooden piece will lose heat faster than the metallic piece when moved to a cold room.