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Fluid Mechanics (Grade 7)

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Fluid Mechanics

Which one of the following is NOT considered a fluid?
  1. oil
  2. air
  3. sand
  4. liquid nitrogen
                is the mass per unit volume of a substance.
  1. Mass
  2. Weight
  3. Density
  4. Chemistry
Whose principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?
  1. Pascal
  2. Bernoulli
  3. Archimedes
Whose principle states the pressure exerted by a moving stream of fluid is less than the pressure of the surrounding fluid?
  1. Bernoulli
  2. Pascal
  3. Archimedes
Whose principle states that, when force is applied to a confined fluid, an increase in pressure is transmitted equally to all parts of the fluid?
  1. Bernoulli
  2. Pascal
  3. Newton
The upward force of water or air that keeps an object afloat is called                .
  1. matter
  2. solid
  3. gas
  4. buoyancy
Fluid pressure is always directed
  1. up.
  2. down.
  3. sideways.
  4. in all directions.
According to Boyle's law, if the pressure placed upon a gas is increased,
  1. the volume will increase.
  2. the volume will decrease.
  3. the temperature will increase.
  4. the temperature will decrease.
Air pressure is measured with a(n)                .
  1. thermometer
  2. barometer
  3. anemometer
  4. psychrometer
The force pushing on a surface divided by the area of that surface is                .
  1. pressure
  2. gravity
  3. inertia
What is the density of an object that has a mass of [math]184 g[/math] and a volume of [math]50 cm^3[/math]?
  1. [math]9200 g // cm^3[/math]
  2. [math]3.68 g // cm^3[/math]
  3. [math].271 g // cm^3[/math]
  4. [math]3.74 g // cm^3[/math]
As the pressure of a gas at 2 atm is changed to 1 atm at a constant temperature, the volume of the gas                 .
  1. decreases
  2. increases
  3. remains the same
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