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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is shear stress in fluids?
💡 Hint: Think about forces acting on a flat surface.
Question 2
Easy
What does viscosity measure?
💡 Hint: Consider thicker liquids like honey.
Practice 4 more questions 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 formula for Reynolds number?
- Re = ρVD/μ
- Re = μVD/ρ
- Re = ρ/μVD
💡 Hint: Remember it’s a ratio involving forces.
Question 2
True or False: An increase in viscosity leads to a lower Reynolds number.
- True
- False
💡 Hint: Think about what happens when a fluid becomes thicker.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the forces acting on a model car in a wind tunnel if the drag coefficient is 0.3, frontal area is 2m², and air density is 1.225 kg/m³ at a velocity of 15 m/s.
💡 Hint: Use the drag force formula to calculate.
Question 2
For water flowing over a sphere with a diameter of 0.2m at a velocity of 1m/s, calculate the Reynolds number given water's density is 1000 kg/m³ and viscosity is 0.001 Pa.s. Is the flow laminar or turbulent?
💡 Hint: Remember the flow type depends on the value of the Reynolds number.
Challenge and get performance evaluation