In a good thermos flask, heat loss is reduced through the...
In a good thermos flask, heat loss is reduced through the following features EXCEPT?
the lens surface
the insulating cork
silvered walls
the cork lid
Correct answer is A
The silver coating on the inner bottle of a thermos flask is used to prevent heat transfer by radiation
Which of the units of the following physical quantities are derived? I. Area II. Thrust III. Pres...
Which of the following phenomena causes capillary of liquids in tubes of narrow bore? ...
The invisible part of the spectrum of white light consists of ...
I.Chemical II.Sound III.Electricity Which of the above forms of energy can directly be converted ...
Which of the following is in a neutral equilibrium? ...
Which of the following are both mechanical and transverse? ...