Answer :
Final answer:
In the lab setup, the thermometer is heated primarily through conduction and convection. Conduction occurs through direct contact with the heat source, while convection happens as hot air circulates around the thermometer. Therefore, the correct answer is option b.
Explanation:
Understanding Heat Transfer in the Lab
The laboratory setup involving a thermometer and a burner demonstrates several methods of heat transfer. In this scenario, the thermometer is heated primarily through two mechanisms: conduction and convection.
- Conduction: This is the transfer of heat through direct contact. The thermometer is heated by direct contact with the hot air around it and potentially with surfaces that are in thermal contact.
- Convection: This involves the transfer of heat through the movement of fluids (liquids or gases). Here, the hot air produced by the burner rises and circulates around the thermometer, increasing its temperature.
- Radiation: While radiation does occur (as the burner emits heat in the form of infrared radiation), it is not the dominant method heating the thermometer in this case.
Given these explanations, the correct answer to the question is b. conduction and convection.
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