Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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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) | c. | iron (7.8
g/cm3) | b. | silver (10.5
g/cm3) | d. | glycerin
(1.26 g/cm3) |
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2.
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Which of the following substances will sink in glycerin? (The density of
glycerin 1.26 g/cm3.)
a. | water (1.00 g/cm3) | c. | benzene (0.90
g/cm3) | b. | ethyl alcohol (0.81
g/cm3) | d. | aluminum
(2.70 g/cm3) |
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3.
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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. | c. | sink. | b. | float at a lower
level in the water. | d. | float
at the same level in the water. |
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4.
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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. |
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5.
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Why does a hot-air balloon float?
a. | The shape of the balloon provides lift. | b. | The volume of the
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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Completion
Complete each
statement.
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6.
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Pressure is the result of force distributed over a(an)
____________________.
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7.
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The formula  is used to calculate ____________________.
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8.
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The SI unit of pressure is the ____________________.
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9.
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A pascal, the SI unit of pressure, is equal to 1 newton per
____________________.
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10.
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A substance that flows and assumes the shape of its container is a(an)
____________________.
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11.
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As a liquid is added to a beaker, the pressure exerted by the liquid on the
bottom of the beaker ____________________.
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12.
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The pressure exerted by a fluid at any given depth is exerted
____________________ in all directions.
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13.
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As your altitude increases, air pressure ____________________.
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14.
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A hydraulic jack is an application of ____________________ principle.
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15.
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A device that uses pressurized fluids acting on pistons of different sizes to
change a force is called a(an) ____________________.
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16.
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As the speed of a fluid increases, the ____________________ within the fluid
decreases.
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17.
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In a hydraulic lift system, the fluid pressure exerted throughout the system is
____________________.
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18.
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The downward force produced when air flows over the winglike spoiler on a race
car is an example of ____________________ principle.
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19.
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The apparent loss of weight of an object in a fluid is called
____________________.
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20.
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The direction of the buoyant force on an object placed in a fluid is
____________________.
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21.
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Even a rock at the bottom of a lake has a(an) ____________________ force acting
upward on it.
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22.
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The unit g/cm3 is often used to express ____________________.
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23.
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As you climb a high mountain, the buoyant force exerted on you by the atmosphere
____________________.
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24.
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A submerged submarine alters its ____________________ to rise or fall in the
water.
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25.
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The weight of an object that sinks in a fluid is ____________________ than the
buoyant force acting on it.
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