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Eleventh Grade (Grade 11) Fluid Mechanics Questions

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Grade 11 Fluid Mechanics
If an object is floating in a fluid, which of the following is true?
  1. The volume of the displaced fluid equals the volume of the object.
  2. The density of the fluid equals the density of the object.
  3. The density of the fluid is greater than the density of the object.
  4. The density of the fluid is less than the density of the object.
Grade 11 Fluid Mechanics
Which of the following is a correct statement of Bernoulli’s principle?
  1. The pressure in a fluid decreases as the fluid’s velocity increases.
  2. The pressure in a fluid increases as the fluid’s velocity increases.
  3. The density of a fluid decreases as the fluid’s velocity increases.
  4. The density of a fluid increases as the fluid’s velocity increases.
Grade 11 Fluid Mechanics
What kind of forces are dominant in turbulent flows?
  1. inertial forces
  2. viscous forces
Grade 11 Fluid Mechanics
The ideal gas law predicts that the molar volume (volume of one mole) of gas equals
  1. (MW)P/RT.
  2. gRT/PV.
  3. RT/P.
  4. 1/2ms-2.
  5. 22.4 L at any temperature and pressure.
Grade 11 Fluid Mechanics
A real gas most closely approaches the behavior of an ideal gas under conditions of
  1. low P and T.
  2. STP.
  3. high P and low T.
  4. high P and T.
  5. low P and high T.
Grade 11 Fluid Mechanics
The height of the liquid column that is raised in a capillary is independent of
  1. contact angle.
  2. density of liquid.
  3. acceleration due to gravity.
  4. liquid-air surface tension.
  5. depth to which the capillary is submerged.
  6. radius of the tube.
Grade 11 Fluid Mechanics
What is true for a liquid level in a narrow tube as compared to a wider tube?
  1. The liquid level will be higher in a wider tube.
  2. The liquid level will be higher in a narrow tube.
  3. Level of liquid does not depend on thickness of tube.
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