Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Pressure in a liquid depends on the _____.
a. | depth of the measuring point | b. | mass of the liquid | c. | volume of the
liquid | d. | density of the liquid | e. | both A and D |
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2.
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Where is the pressure greater, one meter beneath the surface of Lake Michigan or
one meter beneath the surface of a swimming pond?
a. | In Lake Michigan | b. | The pressure is approximately the same in both
places | c. | In the pond |
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3.
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Water pressure on a submerged object is greatest against the _____.
a. | corners of the object | b. | bottom of the object | c. | sides of the
object | d. | top of the object | e. | none of the
above |
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4.
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Archimedes' principle says that an object is buoyed up by a force that is
equal to the _____.
a. | weight of the fluid displaced | b. | mass of the fluid displaced | c. | volume of the fluid
displaced | d. | mass of the object | e. | none of the
above |
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5.
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The reason objects immersed in a fluid experience an upward buoyant force is
because fluid pressure on the bottom of the object is greater than fluid pressure on the top of the
object.
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6.
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The reason a life jacket helps you float is that _____.
a. | the jacket repels water | b. | the jacket makes you weigh
less | c. | the jacket has the same density as an average human | d. | you and the jacket
together have density less than your density alone |
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7.
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Lobsters live on the bottom of the ocean. The density of a lobster is
_____.
a. | equal to the density of seawater | b. | greater than the density of
seawater | c. | less than the density of seawater |
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8.
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An egg is placed at the bottom of a bowl filled with water. Salt is slowly added
to the water until the egg rises and floats. From this experiment, one can conclude that
_____.
a. | buoyant forces do not always act upward | b. | the density of salt
water exceeds the density of the egg | c. | salt sinks to the bottom | d. | calcium in the
eggshell is repelled by sodium chloride | e. | none of the
above |
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9.
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If an object has a density greater than the density of water, it will
_____.
a. | sink | b. | neither float nor sink, but stay anywhere it is
put | c. | float |
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10.
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A boat loaded with a barrel of water floats in a swimming pool. When the water
in the barrel is poured overboard, the swimming pool level will _____.
a. | fall | b. | rise | c. | remain
unchanged |
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11.
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When an ice cube in a glass of water melts, the water level _____.
a. | remains the same | b. | rises | c. | falls |
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12.
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When you float in salt water compared to floating in fresh water, the buoyant
force that supports you is _____.
a. | the same | b. | greater | c. | less |
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13.
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Pascal's principle says that changes in pressure at any point in an
enclosed fluid _____.
a. | remain only at the point | b. | are transmitted to all points in the
fluid | c. | quickly diminish from point to point in the fluid | d. | are transmitted only
to points below it | e. | are transmitted only to points close to
it |
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14.
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A hydraulic press works because _____.
a. | liquids transmit pressure undiminished | b. | one piston is larger than the other
piston | c. | Pascal's principle is operating | d. | liquids transmit pressure in all
directions | e. | all of the above |
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15.
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A hydraulic arrangement consists of a water-filled U-tube that is wider on one
end than on the other. Pistons are fitted in both ends. To multiply an input force, the input end
should be the one having the _____.
a. | larger-diameter piston | b. | smaller-diameter piston | c. | It doesn't
matter what relative size the piston is. |
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16.
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An industrial container holds 100 N of water. The area of the inside bottom of
the container is 2 square meters. What pressure does the water exert on the bottom of the
container?
a. | 0.02 N per square meter | b. | 50 N per square meter | c. | 100 N per square
meter | d. | 400 N per square meter | e. | none of the
above |
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True/False
Indicate whether the
statement is true or false.
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17.
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Pressure at the bottom of a lake depends on the weight density of the lake water
and on the volume of the lake.
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18.
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The upward force that a liquid exerts on a submerged or partly submerged object
is called buoyant force.
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19.
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The weight of fluid displaced by a floating object is equal to the weight of the
object.
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20.
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Archimedes' principle says that whenever you change the pressure in one
part of a fluid, this change is transmitted to other parts of the fluid.
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Bonus Question (10 Points)
Short Answer
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21.
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Three equal-size holes are drilled at the top, middle, and bottom of the side of
a barrel filled with water. Describe the path of water coming from each hole. Explain why water from
the bottom hole comes out the fastest.
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