In a thermos flask, heat loss by radiation is minimizes b...
In a thermos flask, heat loss by radiation is minimizes by the
silvered surfaces
vacuum within the doubled walls
plastic stopper
cork support
Correct answer is A
No explanation has been provided for this answer.
A string is sustaining a stationary wave when ...
Which of the following quantities are scalars? i. Electrical potential ii. Torque iii. Momentum...
A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the ce...