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Physical Science Chapter 13
Test Description: Forces and Fluids
Instructions: Answer all questions to get your test result.
1) A resting object exerts pressure equal to
A
its mass times its contact area
B
its weight times its contact area
C
its mass divided by its contact area
D
its weight divided by its contact area
2) Compared to the pressure exerted by a brick standing on its end, the pressure exerted by a brick resting on its side is
A
the same
B
twice as much
C
less
D
more
3) The amount of water pressure you experience while swimming in a pool depends on
A
your buoyancy
B
how deep you are in the water
C
the volume of water in the pool
D
the area of the pool
4) Which of the following is NOT true about the SI unit of pressure?
A
it is equal to one newton per square meter
B
it represents force per unit area
C
it is used for fluids only
D
it is called a pascal
5) Blaise Pascal discovered that changes in pressure
A
are transmitted equally throughout a fluid
B
decrease with depth of fluid
C
increase with depth of fluid
D
depend on area
6) In a hydraulic lift system, the output force is greater than the input force because
A
a larger pressure acts on the output piston
B
a larger pressure acts on the input piston
C
the fluid pressure acts on areas of different sizes
D
of Bernoulli's principle
7) Which of the following is NOT true about Bernoulli's principle?
A
as a fluid's speed increases, the pressure within it decreases
B
it helps explain the lift of an airplane
C
the pressure within a moving fluid is greater than the pressure within a nonmoving fluid
D
when a moving fluid slows, the pressure within it increases
8) The buoyant force acting on a submerged object is equal to
A
the mass of the fluid displaced by the object
B
the object's mass
C
the object's volume
D
the weight of the fluid displaced by the object
9) A partially submerged object floats when
A
the object's mass is equal to the buoyant force
B
the buoyant force is downward
C
the object's weight is greater than the buoyant force
D
the object's weight is equal to the buoyant force
10) A submarine changes depth by altering its
A
shape
B
total area
C
density
D
speed
*select an answer for all questions
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