For glass wool the thermal conductivity varies from sample to sample because of variations in
A) Structure
B) Composition
C) Density
D) Porosity
E) All of the above
Correct Answer:
Verified
Q11: A dimensionless heat transfer coefficient which gives
Q12: If thermal conductivity of a material of
Q13: Dynamic similarity is the similarity of
A)Shape
B)Forces
C)Velocities
D)Effective dimensions
E)None
Q14: Which of the following is an example
Q15: The sensible heat of hot industrial gases
Q17: Metals are good conductors of heat because
A)They
Q18: Which one of the following cannot be
Q19: A body cools from 80°C to 70°C
Q20: Calorific value of Indian coal is
A)5700 kcal/kg
B)9600
Q21: The statement that the emissivity and absorptivity
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