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Flashcards in Ch. 13 Test Deck (17):
0

What is the equation for pressure?

Pressure=Force/Area

1

What is the SI unit of pressure?

Pascal

2

Pressure is the greatest at where?

Greatest depth

3

Fluid can be a ________ or _________.

Gas or liquid

4

What does pressure depend on?

Type and amount

5

What is atmospheric pressure?

Air pressure increases as altitude decreases

6

State Archimedes's Principle.

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

7

State Bernoulli's Principle.

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

8

State Pascal's Principle.

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

9

What is a hydraulics system?

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

10

What is lift?

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

11

What is buoyant force?

An upward force that acts in the opposite direction of gravity

12

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

Sink

13

Why do hot air balloons float?

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

14

What happens to pressure as speed increases?

It decreases

15

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

Force and area

16

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

The pressure is exerted equally in all directions