In the present experiment, the students will heat a metallic rod in a temperature-regulated furnace or on a hot plate and place it inside a cavity approximating a black body cavity. The temperature on the surface of the heated object as well as inside the cavity will be monitored with time. The rate of cooling will be determined and the impact of forced convection currents will also be investigated. The students will learn how to interface temperature sensors with the computer. In the course of the measurements, the students will also verify Newton’s law of cooling as a special case.
|Software Code||LabVIEW Code
|Sample Results||Forced and natural convection
Forced and natural convection, linearized plots
|Version||17 January 2015, 2015-v1|
Further Readings and References
- Do darker objects really cool faster? American Journal of Physics , R.A. Bartels , 58 244 , (1990).
- Introducing specific heat through cooling curves The Physics Teacher , C.R. Mattos, A. Gasper , 40 415 , (2002).
- Heating water: rate correction due to Newton's cooling The Physics Teacher , J. O. Connell , 37 551 , (1999).