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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define free convection in your own words.
π‘ Hint: Think about how heat causes fluid to move without mechanical assistance.
Question 2
Easy
Explain the significance of the Nusselt number in heat transfer.
π‘ Hint: Consider how heat moves differently by conduction and convection.
Practice 1 more question and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the main driving force for free convection?
- A) Mechanical force
- B) Buoyancy
- C) Gravity
π‘ Hint: Think about how hot air behaves relative to cold air.
Question 2
True or False: The Rayleigh number is a measure of both buoyancy effects and viscous effects.
- True
- False
π‘ Hint: Recall the components contributing to the Rayleigh number.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A vertical plate experiences a temperature difference of 40Β°C with the surrounding fluid. Calculate the Rayleigh number given the fluid properties: g = 9.81 m/sΒ², Ξ² = 0.0034 1/Β°C, L = 1 m, Ξ½ = 0.00089 mΒ²/s.
π‘ Hint: Review the equation and identify each variable from the parameters given.
Challenge and get performance evaluation