Click to start!
9Click to start!
10Click to start!
10Plastic is a good conductor of heat.
A thermos flask can keep both hot and cold liquids for a long time.
The thermos flask has a single-walled glass vessel.
The space between the two walls of a thermos flask is a vacuum.
Vacuum reduces heat transfer by conduction and convection.
Silvered surfaces help in reducing heat loss due to radiation.
The outer cover of a thermos is made only of glass.
A cork stopper is used to close the mouth of the thermos.
Heat can easily enter or escape from a thermos flask.
Percentage: 0%
The main purpose of a thermos flask is to
The vessel inside a thermos flask is made of
The space between the walls of a thermos flask contains
Which heat transfer is prevented by vacuum?
Silvered surfaces mainly reduce heat loss due to
The outer protective cover of a thermos is usually made of
The stopper of a thermos is made of
The vessel in a thermos is kept over an insulating
Which part prevents heat transfer through radiation?
Heat remains inside a thermos because it is
A ______ flask keeps liquids hot or cold for a long time.
The thermos consists of a glass vessel with ______ walls.
The space between the walls is a ______.
Vacuum reduces heat loss by ______ and convection.
The walls are coated with ______ surfaces.
Silvered surfaces reduce heat loss due to ______.
The glass vessel is protected by a ______ or plastic cover.
The mouth of the vessel is closed with a ______ stopper.
The vessel is placed on an insulating ______.
A thermos flask is ______ insulated.