Ch. 13 Test Flashcards

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0
Q

What is the SI unit of pressure?

A

Pascal

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1
Q

What is the equation for pressure?

A

Pressure=Force/Area

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2
Q

Pressure is the greatest at where?

A

Greatest depth

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3
Q

Fluid can be a ________ or _________.

A

Gas or liquid

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4
Q

What does pressure depend on?

A

Type and amount

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5
Q

What is atmospheric pressure?

A

Air pressure increases as altitude decreases

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6
Q

State Archimedes’s Principle.

A

The buoyant force of an object is equal to the weight of the fluid displaced by the object

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7
Q

State Bernoulli’s Principle.

A

As the speed of a fluid increases, the pressure within the fluid increases

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8
Q

State Pascal’s Principle.

A

A change in pressure at any point in a fluid is transmitted equally and unchanged in a ll directions of the fluid

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9
Q

What is a hydraulics system?

A

A devise that uses pressurized fluid acting on pistons of different sizes to change a force

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10
Q

What is lift?

A

The pressure difference between the top and the bottom of a wing that creates an upward force

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11
Q

What is buoyant force?

A

An upward force that acts in the opposite direction of gravity

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12
Q

If the object’s density is greater than the density of a liquid, the objet will _____.

A

Sink

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13
Q

Why do hot air balloons float?

A

The pressure inside the balloon is lesser than the air outside the balloone

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14
Q

What happens to pressure as speed increases?

A

It decreases

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15
Q

What are two factors that determine what the pressure of a fluid exerts?

A

Force and area

16
Q

How do the particles of a liquid exert pressure on a container?

A

The pressure is exerted equally in all directions