science air pressure
Terms
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- What does P stand for?
- the pressure a gas exerts
- What is V
- the volume a gas occupies
- what is N?
- the amount of gas in moles
- what is a mole?
- 6.022 X 10 to the 23 molecules
- What is T?
- a measure of the random kinetic energy in a gas in Kelvin
- What is Boyles Law?
- P1V1 = P2V2
- What are the bends?
- pain or paralysis when nitrogen bubbles form in the blood
- Why do astronauts, divers, and bridge workers get the bends?
- Because they all go from high pressure to low pressure in their jobs
- What is Charles Law?
- v1/T1 = V2/T2
- What are two ways to make a vaccuum ?
-
1. Take a trapped gas and expand the volume
2. Take molecules out of a closed space (i.e. fire in the flask) - How come you can't breathe through a snorkel at 10 feet below but u can breathe under a diving bell?
- Because the pressure on ur chest at 10 feet is 1.3 atmos and the air ur breathing is 1 atmo so the pressure difference makes it impossible to breathe, but with a diving bell theres not a pressure difference
- Pressure = ?
- Force over area
- What did we put into the rocket to make it fly?
- Water and air (120 lbs/in2)
- What makes the rocket fly?
- The air pressure inside is greater than the air pressure outside
- What is the equation involving pressure, temp, volume?
- Pv = Nrt