Chapter 14 Gases and Plasmas Flashcards
1
Q
Atmospheric pressure
A
The pressure exerted against bodies immersed in the atmosphere. It results from the weight of air pressing down from above. At sea level, atmospheric pressure is about 101kPa.
2
Q
Barometer
A
Any device that measures atmospheric pressure.
3
Q
Boyle’s law
A
The product of pressure and volume is a constant for a given mass of confined gas, as long as temperature remains unchanged: P1V1 = P2V2
4
Q
Achimedes’ Principle (for air)
A
An object in the air is buoyed up with a force equal to the weight of displaced air.
5
Q
Bernoulli’s principle
A
When the speed of a fluid increase, internal pressure in the fluid decreases.
6
Q
Plasma
A
An electrified gas containing ions and free electrons. Most of the matter in the universe is in the plasma phase.
