p1.3 Flashcards
Why do gases exert a pressure
The gas particles collide with the inside surface. This s collision produces a very small force. There are many collisions producing a large force over a certain area leading to a gas pressure.
How does temperature affect gas pressure
An increase in temperature leads to an increase in pressure as the particles have a higher kinetic energy so collide more frequently with the container creating a bigger force over the same area.
Pressure equation
Pressure = force/area
What is the relationship between pressure and volume
Pressure is inversely proportional to volume at the same temperature.
So, pressure x volume = constant.
What is the simple model of the atmosphere
That the density of the atmosphere is the same everywhere.
What is atmospheric pressure
The pressure that the gases in the atmosphere exert.
What happens to atmospheric pressure as you go up
Atmospheric pressure decreases
Liquid pressure formula
Pressure = Height of column (m) x Density of liquid (kg/m cubed) x Gravitational field strength
What determines whether the object will float
If the water exerts a bigger force of upthrust than the density of the object.
