Extra Information About Pressure Flashcards
Atmospheric pressure changes with _____.
Height
As air becomes thinner, the density of air ____ and so does the pressure of the air.
Decreases
As altitude increases air becomes less ____, decreasing atmospheric pressure.
Dense
As air becomes less dense, it contains less gas per unit of ______, and therefore less ______.
Volume
Oxygen
As water vapor increases, the density of air ______.
Decreases
As air becomes warmer it becomes less dense, causing ____________ pressure to fall.
Atmospheric
Pressure on sunny day
Pressure on a stormy day
High
Low
What 4 factors can be considered important when considering liquid pressure?
- Pressure in a liquid increases with depth
- Pressure at a particular depth acts equally in all directions
- Pressure depends on the density of the liquid
- A liquid finds its own level
Hydraulic systems can be considered to be?
Force multipliers
Explain why the can collapses when cooled rapidly after heating .
Before heating the can is filled with water and air, during heating water changes from liquid to gas (water vapor) while that is happening water vapor pushes the air out into the atmosphere, during condensation it takes less space in the can therefore this small amount of liquid cannot exert much pressure on the can, therefore the atmospheric pressure is greater than the pressure in the can, (equilibrium) causes the can to crush.
