The vacuum in a thermoflask reduces heat loss resulting f...
The vacuum in a thermoflask reduces heat loss resulting from
radiation only
conduction and convection only
radiation and convection only
conduction only
Correct answer is B
The vacuum of a thermos flask prevents heat loss by conduction and convection, conduction because vacuum is a poor conductor of heat, convention because
Which of the following characteristics of light determines its colour? ...
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Which of the following media allow the transmission of sound wave through them i. Air. ii. Liqui...
The force between the molecules of a liquid in contact with that of a solid is ...
A radio wave has a wavelength of 150m. If the velocity of radio waves in free spaces is 3 x 108...