Book M Ch 3 Test
.
- 1.Pressure is equal to
- A.
Force x area
- B.
Force / area
- C.
Mass / volume
- 2.The SI unit of pressure is the
- A.
Millibar
- B.
Newton
- C.
Pascal
- 3.If the area decreases, the pressure
- A.
Increases
- B.
Decreases
- C.
Remains the same
- 4.A pascal is
- A.
1 M/n
- B.
1 N/m2
- C.
1 kg/m
- 5.A tall thin glass and a wide short glass both have equal amounts of water. The pressure on the bottom of the tall thin glass is ___ than the pressure on the bottom of the wide short glass.
- A.
Greater than
- B.
Less than
- C.
The same as
- 6.A substance that has no definate shape and has the ability to flow
- A.
Solid
- B.
Fluid
- C.
Gas
- 7.An instrument used to measure air pressure
- A.
Barometer
- B.
Anemometer
- C.
Graduated cylinder
- 8.Place a check mark on all of the following that are fluids
- A.
Cloth
- B.
Water
- C.
Ice
- D.
Paper
- E.
Soup
- F.
Motor oil
- 9.Place a check mark on all of the following that ARE NOT fluids
- A.
Helium
- B.
Paper clip
- C.
Plasma
- D.
Wet paint
- E.
Ice
- F.
Cloth
- 10.The pressure exerted on an object by a fluid is always perpendicular to the surface of the object
- A.
True
- B.
False
- 11.The bouyant force depends upon the shape of the object in the fluid.
- A.
True
- B.
False
- 12.Density is force/unit area
- A.
True
- B.
False
- 13.As you increase the area over which a force is applied, you decrease the pressure
- A.
True
- B.
False
- 14.For an object to sink in a fluid there must be an unbalanced force
- A.
True
- B.
False
- 15.Bouyant force acts in all directions
- A.
True
- B.
False
- 16.Pascal's principle explains hydraulic systems
- A.
True
- B.
False
- 17.The upward force on an airplane's wing is thrust
- A.
True
- B.
False
- 18.The pressure of an object is equal to the ___ applied to the surface of the object.
- A.
Force per unit of volume
- B.
Force per unit of area
- C.
Mass per unit of volume
- D.
Mass per unit of area
- 19.If you were walking in the snow and add snowshoes to your boots, the pressure on the snow would ___.
- A.
Become less
- B.
Become greater
- C.
Not change
- D.
Decrease with the depth of snow
- 20.A fluid always
- A.
Has definate shape and volume
- B.
Can be compressed and flows
- C.
Has no definate shape and flows
- D.
Fills the volume of the container
- 21.The bouyant force
- A.
Exerts a downward force on an object
- B.
Exerts an upwards force on an object
- C.
Is less than the density of water
- D.
Resists the motion of an object
- 22.The bouyant force on an object is equal to the __.
- A.
Volume of the fluid it displaces
- B.
Weight of the fluid it displaces
- C.
Volume of the object
- D.
Weight of the object
- 23.As the speed of a fluid decreases, the pressure it exerts ____.
- A.
Increases
- B.
Decreases
- C.
Remains the same
- D.
Becomes infinate
- 24.If you squeeze the bottom of a closed tube of toothpaste, the pressure is increased ___.
- A.
On the sides of the tube
- B.
Everywhere in the tube
- C.
On the bottom of the tube
- D.
On the top of the tube
- 25.In a hydraulic system, the pressure on the large piston is ___ the pressure on the small piston
- A.
Greater than
- B.
Less than
- C.
The same
- D.
Not related to
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