EXAM - Vacuum Flask

Question 1

Vacuum

Answer 1

Vacuum reduces heat loss by conduction and convection only radiated heat can travel through a vacuum

Question 2

plastic case

Answer 2

outer plastic case reduces heat loss by conduction

Question 3

Tight fit stopper

Answer 3

reduces conduction convection and radiation from the top of the flask

Question 4

Support

Answer 4

Small support stops the glass from touching the outer container to minimise heat loss by conduction

Question 5

Double glass bottle

Answer 5

Glass is a good insulator reducing heat loss by conduction and is also good to contain the vacuum