Q3: Indicate True or False. I. Radiation does not need a conducting medium but needs a medium for its emission. II. Thermal resistance is directly proportional to the length of m... Q3: Indicate True or False. I. Radiation does not need a conducting medium but needs a medium for its emission. II. Thermal resistance is directly proportional to the length of material across. III. Which of the Nusselt Number includes the mass diffusivity. IV. Convection is the only mode of heat transfer that can occur in fluids. V. Mass transfer cannot occur in solids.
Understand the Problem
The question is asking to identify whether the statements related to heat transfer methods and principles are true or false. This involves understanding concepts related to radiation, thermal resistance, and convection.
Answer
I: False, II: True, III: None, IV: False, V: False
I: False, II: True, III: None, IV: False, V: False
Answer for screen readers
I: False, II: True, III: None, IV: False, V: False
More Information
Radiation can occur in a vacuum and doesn't need a medium at all. Conduction, not convection, is generally thought of alongside convection in fluids.
Tips
Don't confuse the Nusselt number with mass transfer numbers like the Sherwood number.
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