A thermos (vacuum) flask keeps liquids hot or cold for long periods by employing…
PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A thermos (vacuum) flask keeps liquids hot or cold for long periods by employing several design features. State which mode of heat transfer is chiefly reduced by each of the following features:
(i) silvered inner surfaces
(ii) evacuated space
(iii) cork or plastic stopper