Physical Science Ch 13 Review #2 Question Preview (ID: 18277)
Fluid Test Review #2.
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Which of the following states Bernoulli's Principle?
a) As the speed of a fluid decreases, the pressure within the fluid decreases.
b) As the speed of a fluid increases, the pressure within the fluid decreases.
c) As the speed of a fluid changes, the pressure of the fluid remains constant.
d) none of the above
The upward force acting on the wing of an airplane in flight is called
a) drag
b) lift
c) thrust
d) weight
Which of the following statements is true about an airplane wing during flight
a) Air above the wing travels faster than air below the wing.
b) Air below the wing travels faster than air above the wing.
c) The wing exerts pressure equally in all directions
d) The lift acting on the wing reduces the weight of the wing.
The upward force acting on an object submerged in a fluid is called
a) buoyant foece
b) drag
c) pressure
d) weight
A brick weighs 26 N. Measured underwater, it weighs 11 N. What is the sizeof the buoyant force exerted by the water on the brick?
a) 37 N
b) 26 N
c) 11 N
d) 15 N
The strength of the buoyant force acting on an object in a fluid depends on the object's
a) mass
b) surface area
c) volume
d) weight
The buoyant force on an object in a fluid is equal to the weight of the
a) fluid
b) fluid surrounding the object
c) fluid displacement by the object
d) object
The relationship between buoyant force and weight of a displaced fluid was first stated by
a) Archimedes
b) Bernoulli
c) Newton
d) Pascal
A ball is floating partially submerged in a liquid. The buoyant force acting on the ball equals he
a) volume of the ball below the surface
b) volume of he ball above the surface
c) mass of the ball
d) weight of the ball
Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm3)
a) copper (8.9 g/cm3)
b) silver (10.5 g/cm3)
c) iron (7.8 g/cm3)
d) glycerin (1.26 g/cm3)
Which of the following substances will sink in glycerin? (The density of glycerin 1.26 g/cm3)
a) water (1.00 g/cm3)
b) ethyl alcohol (0.81 g/cm3)
c) benzene (0.90 g/cm3)
d) aluminum (2.70 g/cm3)
A cork is floating in salty water. As more salt is added to the water to increase its density, the cork will
a) float at a higher level in the water
b) float at a lower level in the water
c) sink
d) float at the same level in the water
Two identical corks float in separate beakers. One beaker contains distilled water. The other contains very salty water. Which of the following statements is true?
a) The corks float at the same level in both liquids.
b) The cork in the very salty water floats at a lower level than the other cork.
c) The corks will eventually sink.
d) Both corks are subject to the same buoyant force.
Why does a hot-air balloon float?
a) The shape of the balloon provides lift?
b) The volume of air displaced by the balloon is less than the volume of the balloon.
c) The weight of the air displaced is less than the volume of the balloon.
d) The weight of the balloon is less than the weight of the air displaced by the balloon.
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