Physics
WAEC 2010
In a thermos flask, heat loss by radiation is minimizes by the
-
A.
silvered surfaces
-
B.
vacuum within the doubled walls
-
C.
plastic stopper
-
D.
cork support
Correct Answer: Option A
Explanation
The silvered wall prevents heat loss by radiation. Silver is a poor radiator, and any heat from one wall tends to be reflected back by the other.
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