A perfect emitter or absorber of radiant energy is a
...A perfect emitter or absorber of radiant energy is a
conductor
black body
white body
red body
Correct answer is B
Dull, black surface are good emitters or absorbers of energy
Which of the following substances lowers the surface tension of water? ...
A resistor with fixed resistance value is called a ...
Which of the following statements is not correct? ...
The limiting frictional force between two surface depends on I. the gaseous reaction between t...
A rocket is fired from the earth's surface to a distant planet. By Newton's law of universal...