Assignment

1. What is the thermal conductivity of the specimen when an aluminum Lee's disc with mass 1 kg, length 1 cm, and height 4 cm is used? A cardboard of 1 mm thickness is used as an insulator.
2. The aluminum Lee's disc has height 1 cm, length 5 cm, and mass 2 kg. Draw the cooling curve of the specimen when cardboard of 3 mm thickness is used as an insulator.
3. Using Lee's disc method, find out the ratio of thermal conductivity between cardboards of thickness 1 mm and 2 mm. Choose brass as the Lee's disc material with mass 5 kg, length 2 cm, and height 3 cm.
4. What is the thermal conductivity of the specimen when a brass Lee's disc with mass 2.5 kg, length 3 cm, and height 2.5 cm is used? A cardboard of 1 mm thickness is used as an insulator.
5. Using Lee's disc method, explain the cooling mechanism and find the thermal conductivity of the material when an aluminum Lee's disc of mass 5 kg, length 2 cm, and height 1.5 cm is used. The insulator is cardboard with 2 mm thickness.