Section 5 Flashcards
1
Q
pressure difference (definition)
A
the difference in pressure between two points in a liquid or gas
2
Q
what two things do particles need to be doing to escape from the surface of a liquid?
A
- travel in the right direction to escape the liquid
- travel fast enough to overcome the attractive forces of other particles in the liquid
3
Q
relationship between kinetic energy and temperature
A
the temperature of a gas (in kelvins is proportional to the average kinetic energy of its particles
4
Q
Brownian motion
A
- particles move in a zigzag, random motion
- large, heavy particles can be moved by Brownian motion by smaller particles (eg air) travelling at high speeds
5
Q
what is absolute 0?
A
the coldest something can every get
6
Q
value of absolute 0
A
-273 degree C
7
Q
how to convert from degrees Celcius to kelvins?
A
ADD 273
