The inner walls of a thermos flask are silvered to:
Amake air rise inside
Babsorb outside heat
Cconduct heat quickly
Dsend heat back inside
Answer & Solution
Correct answer: D. send heat back inside
A shiny silver coat sends radiant heat back, so the hot liquid loses less energy by radiation.
Keep practising Heat
Browse all Heat questions for Olympiad (Class 7), or explore more Science topics.
Related questions
Some solar water heaters move hot water upward without a pump by:Thick mud walls keep a hut cooler in summer mainly because mud is a:An ice cube melts in your hand because heat flows:While measuring the temperature of hot water, the laboratory thermometer should be held:When a 90 degrees C block touches a 10 degrees C block, the hotter block's temperature wilHeat is a form of:Normal body temperature on the Fahrenheit scale is nearly:The bottoms of cooking vessels are often blackened with soot because black surfaces: