How are the (i) mass, (ii) volume, and (iii) densilty of a metallic piece affected, if at all with increase in temperatur?

Answer

To answer the question regarding how the mass, volume, and density of a metallic piece are affected by an increase in temperature, we can break it down into three parts:

### Step-by-Step Solution:

1. **Effect on Mass**:
- The mass of an object is defined as the amount of matter it contains. When the temperature of a metallic piece increases, the amount of matter does not change. Therefore, the mass remains constant.
- **Conclusion**: The mass of the metallic piece is unaffected by an increase in temperature.

2. **Effect on Volume**:
- When the temperature of a metallic piece increases, it undergoes thermal expansion. This means that the particles within the metal gain energy and move apart, leading to an increase in volume.
- **Conclusion**: The volume of the metallic piece increases with an increase in temperature due to thermal expansion.

3. **Effect on Density**:
- Density is defined as mass per unit volume (Density = Mass/Volume). Since we established that the mass remains constant while the volume increases with temperature, we can analyze the effect on density.
- As the volume increases and the mass remains constant, the density of the metallic piece will decrease.
- **Conclusion**: The density of the metallic piece decreases with an increase in temperature.

### Final Summary:
- **Mass**: No change with increase in temperature.
- **Volume**: Increases with increase in temperature due to thermal expansion.
- **Density**: Decreases with increase in temperature as volume increases while mass remains constant.