A closed metal container holds a fixed mass of air, and its sides are insulated. A scientist is examining the thermal conductivity of air. She measures the rate at which thermal energy is transferred between the top and the bottom of the box. Which row shows the correct procedure and conclusion?
- Aprocedure: heat bottom surface; conclusion: air is a good thermal conductor
- Bprocedure: heat bottom surface; conclusion: air is a poor thermal conductor
- Cprocedure: heat top surface; conclusion: air is a good thermal conductor
- Dprocedure: heat top surface; conclusion: air is a poor thermal conductor