ICSE Class 9 Answered
(a) Draw a neat diagram of thermos flask.
(b) State how heat losses by three modes of transmission are minimised in thermos flask.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a)
(b) Heat loses in thermos flask are minimised by :
Conduction : Glass is bad conductor of heat.
There is vaccum between two surfaces of glass.
Convection : There is vaccum between two surfaces of glass.
The mouth of bottle is corked.
Radiation : The silvered surfaces are poor absorbers and poor radiators.
The mouth of bottle is corked.
Answered by | 04 Jun, 2014, 03:23: PM
