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Form 2 Physics Topical Questions and Answers on Fluid Flow

Form 2 Physics Topical Questions and Answers on Fluid Flow

Lessons (20)

• 1.    The figure below represents a tube through which a liquid is flowing in the direction shown by the arrow Show on the diagram the relative positions of the levels of the liquid in section marked x, y and z.
  1m 13s

• 2.    Water flows in a horizontal smooth pipe. State the changes that would be observed in the nature of the flow if the speed of the water is steadily increased from low to a high value.
  1m 46s

• 3.    The figure below shows a Bunsen burner. Use Bernoulli’s principle to explain how air is drawn into the burner, when, the gas tap is opened.
  1m 23s

• 4.    The figure below shows a section of a pipe PQ.Constant Pressure maintains a streamline flow of a liquid in the pipe. If the cross-sectional area A1 at P is less than A2 at Q, state how the liquid velocity V2 at Q compares with velocity VI at P.
  2m 3s

• 5.    A student holds a sheet of paper at one end so that it hangs in the position A as shown in the figure below. Explain why the paper rises to the position B when the student blows air in the direction shown by the arrow.
  1m 12s

• 6.    The figure below shows a non -viscous fluid flowing through a pipe a long which vertical tubes A, B and C' have been fitted. Complete the diagram by indicating the possible levels of the fluid in tubes B and C.
  1m 8s

• 7.    The figure below shows a pith ball placed in a flask. When a jet of air is blown over the mouth of the flask as shown, the pith ball is observed to rise from the bottom. Explain this observation.
  1m 2s

• 8.    State the Bernoulli’s principle
  0m 56s

• 9.    A pipe of radius 6 mm is connected to another pipe of radius 9 mm. If water flows in the wider pipe at a speed of 2m/s what is the speed in the narrower pipe?
  3m 0s

• 10.    The figure below shows a tube of varying cross sectional area. V1, V2, V3 and V4 represent the speeds of water as it flows steadily throughout the sections of the tube. Arrange the speed V1, V2, V3 and V4 in decreasing order starting with the highest.
  1m 14s

• 11.    The figure below shows a sheet of paper rolled into a tube. When a fast moving air is blown into the tube as shown in the diagram the paper tube collapses. Explain the observation.
  0m 56s

• 12.    The figure below shows an incompressible fluid flowing through a pipe.A1 and A2 are cross sectional areas of the pipe in larger section and smaller section of the pipe respectively, while V1 and V2 are speeds of the two sections of the pipe. Derive an expression for the ratio of the speeds #(V2)/(V1)# in terms of A1 and A2.
  2m 55s

• 13.    The figure below shows air flowing through a pipe of different cross- sectional areas. Two pipes A and B are dipped into water. Explain the cause of the difference in the levers of water in the pipes A and B
  1m 48s

• 14.    An aeroplane is moving horizontally through still air at a uniform speed. It is observed that when the speed of the plane is increased, its height above the ground increases. State the reason for this observation.
  0m 43s

• 15.    The figure below shows parts A, B and C of a glass tube. State with a reason the part of the tube in which the pressure will be lowest when air is blown through the tube from A towards C.
  1m 6s

• 16.    For a fluid flowing at a velocity V in a tube of cross-sectional area A, VA = constant. State two assumptions made in deriving this equation.
  0m 50s

• 17.    The figure below shows two inflated balloons hanging vertically on light threads. When a stream of air is blown in the space between the balloons, they are observed to move towards each other. Explain this observation.
  0m 52s

• 18.    The figure shows a horizontal tube with two vertical tubes x and y. Water flows through the horizontal tube from right to left. The water level in tube x is higher than water level in tube y Explain this observation
  1m 4s

• 19.    The figure below shows part of a petrol engine, in which air flowing under atmospheric pressure passes into a constriction, where it mixes with petrol. The mixture then flows into a combustion cylinder.
  1m 23s

• 20.    State the reason why the speed of water is higher at the narrower section of the river than at the wider section.
  0m 49s