WAEC - Physics (2024 - No. 1)
The vacuum and silvered wall surfaces of a vacuum flask walls are respectively
minimize conduction and convection and prevent radiation
prevent conduction and convection and minimize radiation
prevent conduction and minimize convection and radiation
minimize convection and prevent conduction and radiation
Uitleg
Vacuum: It prevents conduction and convection because there are no air molecules to transfer heat.
Silvered Walls: They minimize radiation by reflecting thermal radiation back.
Silvered Walls: They minimize radiation by reflecting thermal radiation back.