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Fluid Mechanics Questions - All Grades

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Grade 8 Fluid Mechanics
According to Boyle's law, if the pressure placed upon a gas is increased, then                              .
  1. the volume will increase
  2. the volume will decrease
  3. the temperature will increase
  4. the temperature will decrease
Grade 8 Fluid Mechanics
Bernoulli's principle states that                                                              .
  1. pressure is transmitted equally through a fluid
  2. pressure increases as temperature decreases
  3. buoyant force equals weight of fluid displaced
  4. pressure in a fluid decreases as speed of the fluid increases
Grade 7 Fluid Mechanics
Fluid pressure is always directed                  .
  1. upward
  2. downward
  3. sideways
  4. in all directions
Grade 7 Fluid Mechanics
Why will a helium-filled balloon float in the air?
  1. There is more air than helium.
  2. Helium is less dense than air.
  3. Helium is as dense as air.
  4. Helium is more dense than air.
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 8 Fluid Mechanics
A liquid with a low viscosity, or thickness,                     .
  1. has a definite shape
  2. flows quickly
  3. flows slowly
  4. fills its container
Grade 8 Fluid Mechanics
What are the two factors that affect pressure in a fluid?
  1. volume and density
  2. weight and temperature
  3. depth and density
  4. none of the above
Grade 8 Fluid Mechanics
As the gas in a rigid container is heated, its                   .
  1. pressure increases
  2. volume increases
  3. pressure decreases
  4. volume decreases
Grade 4 Fluid Mechanics
Matter has this property, which allows some objects to float on a liquid.
  1. buoyancy
  2. volume
  3. liquid
  4. mass
Grade 9 Fluid Mechanics
You open a cooler to get a soda on a hot summer day and notice a can of diet soda is floating while the cans of regular soda are not floating. What can you infer about this situation? Which of the following is the best statement that describes this phenomenon?
  1. The water must be flowing upward in the area of the diet soda.
  2. There must be less matter in the regular can of soda.
  3. The diet soda must have less mass per unit of volume than the surrounding water.
  4. The diet soda can must be made of a different kind of material.
Grade 10 Fluid Mechanics
P=FA is the equation used to determine fluid pressure. If pressure remains constant and area increases, what will happen to the force?
  1. Force will increase
  2. Force will decrease
  3. Force will remain constant
  4. Force is not a factor
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