Pressure Flashcards
what is the equation for pressure
Pressure = Force / Area
The force exerted on the surface in contact with the fluid particle will be at the WHAT to the surface?
will be at the normal
what is atmospheric pressure
atmospheric pressure is the force per unit of area created by the weight of the air in the atmosphere
why do your ears pop when ascending into the Earth’s atmosphere
your ears pop because of the drop in atmospheric pressure
why is atmospheric pressure low at the top of mountains
atmospheric pressure is low at the top of mountains because there is less particles pressing down on the mountain
We feel the weight of the atmosphere as a pressure of what?
100kPa
what is the equation for pressure difference
pressure difference = height x density x gravitational field strength
what are the 3 quantities needed to calculate pressure difference in a fluid?
1) Gravitational field strength
2) Change in depth
3) Density of fluid
What is the change in pressure when a submarine rises by 1m in fluid of density 2kg/m3? The gravitational field strength is 10N/kg.
1m x 2kg/m3 x 10N/kg = 20Pa
