1.
The equivalent of 161 K in degree celcius is
161 °C
112 °C
-112 °C
-161 °C
2.
In the vacuum flask, the vacuum between the polished walls minimizes heat transfer by
I. conduction.
II. radiation.
III. convection.
Which of the statements above are correct?
I and III only
II and III only
I and II only
I, II and III
3.
The vacuum flask minimizes heat loss by
I. having a vacuum between the two surfaces.
II. polishing the two surfaces.
III. using a cork stopper.
Which of the statements above are correct?
I and II only
I and III only
II and III only
I, II and III
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