Pressure Flashcards
(22 cards)
What is pressure defined as
Force per unit area
What is 1pa equal to
1 n/m2
What is force measured in
Newtons
What is area measure in
Meters squared
What is pressure measure in
N/m2
What happens to pressure when you increase area
Lower pressure
What happens to pressure when you decrease area
Higher pressure
How can you work our force
Pressure times area
What is a fluid
À substance that can easily flow
What is a fluid able to do
Change shape
Is gas à fluid
Yes
What is constantly happening in fluids
Molecules moving in all directions
What are molecules in fluid doing
Colliding with each other and every surface
What happens when each molecules collide
They exert a force on the surface
What is pressure exerted by air called
Air pressure
Why does air exert a pressure
Because it has a mass
What produces an average air pressure
Gravity
What is the average air pressure
10.1
Why do our ears hurt when we dive down
Increase in pressure
Why does your ear pop on a mountain
Air pressure is reduced
What happens to air pressure as depth increases
Air pressure increases
What happens to air pressure as elevation increases
Air pressure decreases
