Questions on mechanical properties of fluids.
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The image contains a set of questions related to mechanical properties of fluids, likely intended for physics students. The questions cover a range of topics, including fluid statics (pressure, Pascal's law), fluid dynamics (Bernoulli's principle, viscosity, streamline flow), and surface tension. Some questions require definitions and explanations, while others involve problem-solving and calculations.
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Here are questions on the mechanical properties of fluids, covering various types of questions.
Here are the questions related to the Mechanical Properties of Fluids, as requested:
Very Short Answer (VSA) (1 MARK Each)
- What is incompressible fluid?
- State Pascal's law.
- What are intermolecular forces?
- Why is the surface tension of paints and lubrication oil kept low
- State Bernoulli's Principle.
Short Answer I (SA1) (2 MARKS Each) 6. State properties of an ideal fluid. 7. Define Pressure of a fluid. State its units and dimensions. 8. Define Surface Tension State its SI unit and dimension. 9. Distinguish between streamline flow and Turbulent flow. (July 2023) 10. Define Coefficient of viscosity. State its SI unit and dimension. (March 2023) 11. A rain drop of radius 0.3 mm falls through air with a terminal velocity of 1 m/s. The viscosity of air is 18 x 106 N-s/m2. Find the viscous force on the rain drop. (Ans: F= 1.017 * 10-7 N) 12. Two soap bubbles have radius in the ratio 2:3. Compare the works done in blowing these bubbles. (Ans: 4:9) 13. In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm². If a force of 25 N is applied to the input piston, calculate weight on output piston.
Short Answer II (SA2) (3 MARKS Each) 14. Derive an expression for pressure exerted by liquid column. On which factor does the pressure due to liquid column depends? 15. Define Angle of contact. State it's four characteristic. 16. Explain the phenomena of surface tension on the basis of molecular theory. 17. State and explain Newton's law of viscosity. 18. Twenty-seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N/m. (Ans: W= 1.628 X 10-7J) 19. A rectangular wire frame of size 2 cm x 2 cm, is dipped in a soap solution and taken out. A soap film is formed, it the size of the film is changed to 3 cm x 3 cm, Calculate the work done in the process. The surface tension of soap film is 3 x 10-2 N/m. (Ans: W= 3x 10-5 J)
Long Answer (LA) (4 MARKS each) 20. Define surface energy? Obtain the relation between surface tension and surface energy. (March 2023) 21. Derive Laplace's law of spherical membrane of bubble due to surface tension. OR Derive an expression for excess pressure inside a liquid drop. 22. Define terminal velocity. Obtain an expression for the terminal velocity of a small sphere falling under gravity through a viscous fluid.
Answer for screen readers
Here are the questions related to the Mechanical Properties of Fluids, as requested:
Very Short Answer (VSA) (1 MARK Each)
- What is incompressible fluid?
- State Pascal's law.
- What are intermolecular forces?
- Why is the surface tension of paints and lubrication oil kept low
- State Bernoulli's Principle.
Short Answer I (SA1) (2 MARKS Each) 6. State properties of an ideal fluid. 7. Define Pressure of a fluid. State its units and dimensions. 8. Define Surface Tension State its SI unit and dimension. 9. Distinguish between streamline flow and Turbulent flow. (July 2023) 10. Define Coefficient of viscosity. State its SI unit and dimension. (March 2023) 11. A rain drop of radius 0.3 mm falls through air with a terminal velocity of 1 m/s. The viscosity of air is 18 x 106 N-s/m2. Find the viscous force on the rain drop. (Ans: F= 1.017 * 10-7 N) 12. Two soap bubbles have radius in the ratio 2:3. Compare the works done in blowing these bubbles. (Ans: 4:9) 13. In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm². If a force of 25 N is applied to the input piston, calculate weight on output piston.
Short Answer II (SA2) (3 MARKS Each) 14. Derive an expression for pressure exerted by liquid column. On which factor does the pressure due to liquid column depends? 15. Define Angle of contact. State it's four characteristic. 16. Explain the phenomena of surface tension on the basis of molecular theory. 17. State and explain Newton's law of viscosity. 18. Twenty-seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N/m. (Ans: W= 1.628 X 10-7J) 19. A rectangular wire frame of size 2 cm x 2 cm, is dipped in a soap solution and taken out. A soap film is formed, it the size of the film is changed to 3 cm x 3 cm, Calculate the work done in the process. The surface tension of soap film is 3 x 10-2 N/m. (Ans: W= 3x 10-5 J)
Long Answer (LA) (4 MARKS each) 20. Define surface energy? Obtain the relation between surface tension and surface energy. (March 2023) 21. Derive Laplace's law of spherical membrane of bubble due to surface tension. OR Derive an expression for excess pressure inside a liquid drop. 22. Define terminal velocity. Obtain an expression for the terminal velocity of a small sphere falling under gravity through a viscous fluid.
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This is a compilation of questions on the topic of 'Mechanical Properties of Fluids', categorized by mark weightage and difficulty level.
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