A) Total vacuum
B) Oil
C) Glycerine
D) Air above atmospheric pressure
Correct Answer: A
Solution :
[a]\[9000\times 1\text{ }\times \left( 50-\theta \right)=1000\times 80+1000\text{ }\times (\theta -0)\] \[4,50,000-9,000\text{ }\theta =80,000+1000\,\,\theta \] \[\therefore \,\,\,4,50,000-80,000\text{ }=\text{ }10,000\theta \] or \[\theta =\frac{3,70,000}{10,000}=37{}^\circ C\]
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