Physics 11 Fluid Dynamics Short Questions

Attempt any 22 (twenty two) short question from Question 2,3 and 4, at least 8 short questions from question 2, 8 short question from question 3 and 6 short question from question

4. All question carry equal marks.

Q.No. 2 Write answers of any EIGHT questions.

(8x2=16)

What are Fluids? Is solid a fluid? Justify your answer. ii) Distinguish between laminar and turbulent flow?

ill) What are terms viscosity and drag force? iv) How do the perfume and paint sprayers works?

v) Write down the mathematical form of Stoke's law and describe its limitation?

vi) Differentiate hydrokinetics and hydrostatics?

vii) A spherical body is dopped in two different fluids and its terminal velocity is found reasons?

vill) How terminal velocity and radius of an object related with each other?

ix) Why the leaves on road start to follow the fast moving car when passes through road? What happen when a body is floating at rest in a still liquid? x)

xi) What are the characteristics of an ideal fluid? xil) Is it possible that speed of emergence of fluid through a pipe can ever be greater than speed of entrance?

Q.No. 3 Write answers of any EIGHT questions.

1) Graphically, describe the relation between pressure and time for heart beat? When water falls, its speed increases and its cross sectional area decreases, why?

(8x2=16)

1)

11) Which conservation law applies on the equation of continuity? Why do rescuers use ladder to reach people who have fallen on frozen lakes or ponds?

Which conservation law applies on Bernoulli's equation? vi) A tall chimney will be suitable or a short one? Explain your answer.

vii)

Have you ever seen a human fluid moving? It obeys fluid mechanics law or not? How the speed and pressure of a fluid related?

viii) bx) How a lift is produced in the wing of an aeroplane?

How a swing is produced in a tennis ball?

Why the formula cars have stream lined structure? A person is standing near a fast moving train. Is there any danger that he will fall towards it? xii)

xi)

Q.No. 4 Write answers of any SIX questions. Two row boats moving parallel in the same direction are pulled towards each other, why?

(6x2=12)

1)

Why fog droplets appear to be suspended in air? How the carbonator of car works?

How the filter pump works?

What is the difference between the blood and water?

vi) Why does the pipe of paper squeeze when air is blown through it? What is systolic and diastolic pressure and what is relation between the torr and the Pascal?

Villy

Why does cloud appear to floating in air? How sphygmomanometer is used to measure the blood pressure?