What causes lift on an airplane wing?

the pressure below the wing is greater than above

If an object is floating, what must be true?

the buoyant force = the objec's weight

Why is the net force on a submerged object called its apparent weight?

it appears to weigh less in the fluid due to buoyant force

Bernoulli's principle in combination with the continuity equation explain that...

pressure increases as pipe diameter increases

What does the difference between gauge pressure and absolute pressure equal?

the pressure at the surface of the fluid

What does Pascal's principle state?

pressure is the same throughout the fluid

Which of the following is NOT an example of laminar flow?

smoke twisting around rising from a fire

When an object is completely submerged resting on the ocean floor...

weight of object is greater than buoyant force

Why does an ideal fluid move faster through a pipe with a decreasing diameter?

pressure within the fluid decreases

Which of the following is NOT an example of turbulent flow?

water in a creek trickling slowly in a straight line

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Fluids & Fluid Principles

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Questions 20

Answers

1
Which is NOT an example of units for pressure?
N/m2
kg/m2
atm
Pa
2
What causes lift on an airplane wing?
the pressure behind the wing is less than in front
the pressure behind the wing is greater than in front
the pressure below the wing is greater than above
the pressure above the wing is greater than below
3
If an object is floating, what must be true?
the object's density is greater than the fluid's density
the buoyant force = the objec's weight
volume of displaced fluid is greater than volume of object
the object only displaces a small amount of fluid
4
The buoyant force of seawater is less than the buoyant force of freshwater on the same boat.
True
False
5
Which of the following is not a fluid?
hydrogen
carbon dioxide
gravel
water
6
Why is the net force on a submerged object called its apparent weight?
it actually loses mass in the fluid
it appears to weigh less in the fluid due to buoyant force
weight of the object is always more than the buoyant force
the object becomes truly weightless
7
The pressure in a fluid decreases as the velocity of the fluid increases.
Pascal's Principle
Bernoulli's Principle
Archimedes Principle
Newton's Laws
8
Pressure applied to a fluid in a closed container is transmitted unchanged through the fluid.
continuity equation
Bernoulli's Principle
Archimedes Principle
Pascal's Principle
9
When two semi trucks are riding side by side, what happens?
they lift upward into the air
they move toward each other
they move away from each other
they are unaffected
10
A large amount of pressure can only result from a large amount of force.
False
True
11
Bernoulli's principle in combination with the continuity equation explain that...
enough pressure might make my teacher move the test date
pressure remains constant as pipe diameter increases
pressure decreases as pipe diameter increases
pressure increases as pipe diameter increases
12
What does the difference between gauge pressure and absolute pressure equal?
the pressure within the fluid
the pressure at the bottom of the fluid
zero
the pressure at the surface of the fluid
13
Which is NOT true about a fluid?
it flows
it changes shape easily
its molecules are able to move past each other
it has a definite shape
14
The buoyant force on an object in a fluid is equal to the weight of the displaced fluid.
Archimedes Principle
Bernoulli's Principle
Pascal's Principle
Venturi Effect
15
What does Pascal's principle state?
pressure from this physics test will make my head explode
pressure is the same throughout the fluid
pressure in a fluid is greatest at the walls of a container
pressure in a fluid is greatest at the center of the fluid
16
Which of the following is NOT an example of laminar flow?
water flowing evenly from a slightly opened faucet
river slowly flowing straight
smoke twisting around rising from a fire
smoke rising in a smooth column
17
When an object is completely submerged resting on the ocean floor...
displaced fluid volume is greater than object volume
buoyant force = weight of object
apparent weight depends only on objec't density
weight of object is greater than buoyant force
18
Why does an ideal fluid move faster through a pipe with a decreasing diameter?
pressure within the fluid decreases
the pipe exerts more pressure on the fluid
the fluid moves downhill
pressure within the fluid increases
19
Which of the following is NOT an example of turbulent flow?
water in a creek trickling slowly in a straight line
river water flowing around rocks in rapids
smoke twisting as it rises from a fire
water flowing unevenly from a fully opened faucet
20
For incompressible fluids, density changes little with changes in what?
pressure
temperature
acceleration due to gravity
depth

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