Let's evaluate the use of pans made of aluminium and copper based on three factors provided in the table: thermal conductivity, density, and cost.
### Thermal Conductivity
- Aluminium: 250 (arbitrary units)
- Copper: 400 (arbitrary units)
Higher thermal conductivity means better heat conduction.
Thus, copper has a higher thermal conductivity compared to aluminium. Therefore, copper is better for conducting thermal energy.
### Density
- Aluminium: 27 g/cm³
- Copper: 8.9 g/cm³
Lower density means the metal is lighter.
So, copper has a lower density compared to aluminium. Therefore, pans made of copper would be lighter than those made of aluminium.
### Cost
- Aluminium: 1.50 per kg
- Copper: 7.00 per kg
Lower cost means the metal is cheaper.
Thus, aluminium is cheaper compared to copper. Therefore, pans made of aluminium would cost less than those made of copper.
### Summary
- Thermal Conductivity: Copper is better because it has higher thermal conductivity (400 vs. 250).
- Density: Copper is better because it is lighter (8.9 g/cm³ vs. 27 g/cm³).
- Cost: Aluminium is better because it is cheaper (1.50 vs. 7.00).
Conclusion:
- Copper is superior in terms of thermal conductivity and density, making it a better choice for heat conduction and handling.
- Aluminium is more economical due to its lower cost.
When deciding between aluminium and copper pans, one should consider these factors. If budget is a constraint, aluminium pans are a cost-effective option. However, if the priority is better heat conduction and ease of handling due to lighter weight, copper pans are the preferable choice.
