thermos grade 8. a thermos flask is used to keep hot ( or cold drinks)
DESCRIPTION
stopper Shiny inner lining Vacuum Plastic/corkTRANSCRIPT
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ThermosGrade 8
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• A thermos
flask is used to keep hot ( or cold drinks)
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stopper
Shiny inner lining
VacuumPlastic/cork
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Stopper• It prevents heat loss by convection.• Hot air particles will be trapped
inside
» back
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Shiny inner lining• It prevents heat
loss by radiation.• It reflects heat
inside the flask and prevents it from leaving.
back
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Vacuum• It reduces heat loss by
conduction.• No particles will be present to
carry heat.
back
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Plastic/cork• It prevents heat loss by
conduction.• Plastic and cork are insulators
back
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Effect of the shiny surface