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Forces In Fluids
Test Description: If you end up seeing the same 5-6 questions. Try a different game. There will be 20 questions.
Instructions: Answer all questions to get your test result.
1) Air above an airplane wing is moving faster than air below an airplane wing. This causes the plane to
A
slow down
B
accelerate
C
increase its elevation
D
decrease its elevation
2) If you blow a stream of air between 2 balloons that are next to each other, the balloons
A
move away from each other
B
move toward each other
C
rise
D
move randomly
3) An object is dropped into a beaker containing liquid. The object drops to the bottom of the beaker. Therefore, the
A
density of the object is less than the density of the liquid
B
volume of the liquid is displaced is more than the volume of the object
C
density of the object is greater than the density of the liquid
D
mass of the object is less than the mass of the liquid
4) An object under water feels lighter than it does in air because of
A
fluid speed
B
buoyancy
C
temperature
D
air pressure
5) When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called
A
Bernoulli's principal
B
Newton's principal
C
Pascal's Principal
D
Archimedes principal
6) At higher elevations, air pressure is
A
less because gravity is stronger
B
less because there is less air above
C
less because the air is moving faster
D
greater because there is more air below
7) Pressure is
A
area/force
B
force x area
C
force + area
D
force/area
8) Which of the following is NOT the SI unit of pressure?
A
N/m2
B
Pascal
C
Newton
D
Pa
9) Fluids exert pressure because they are made up of tiny
A
particles that are buoyant
B
forces that sum together
C
moving molecules that exert forces
D
molecules that push upward
10) Bubbles rise in water because they are
A
more dense than water
B
fluids
C
less dense than water
D
so tiny
11) The pressure exerted by the gas in the Earth's atmosphere is called
A
atmospheric pressure
B
water pressure
C
gravity
D
density
12) The outward pressure exerted by a fluid decreases as the speed of the fluid
A
increases
B
none of the above
C
decreases
D
stays the same
13) The density of a substance is its ______________ per unit of volume.
A
volume
B
area
C
density
D
mass
14) A device that increases force that works because of Pascal's principal, such as the braking system of a car, is called a __________________ device
A
hydraulic
B
pressure
C
hydro
D
piston
15) The rising of smoke up a chimney is partly explained by _________________ principle.
A
Newton's
B
Pascal's
C
Bernoulli's
D
Archimedes'
16) A fluid is a substance whose VOLUME can easily change
A
True
B
False
17) Water pressure INCREASES as depth increases
A
False
B
True
18) The buoyant force always acts in an UPWARD direction.
A
True
B
False
19) Archimedes' principal states that the buoyant force on an object is equal to the MASS of the fluid displaced by the object.
A
True
B
False
20) The density of an object would be changed by changing the object's volume or its MASS.
A
False
B
True
*select an answer for all questions
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