Fluctuations Flashcards
(6 cards)
1
Q
What is the standard deviation of energy?
A
σE=Tsqrt(kBcV)
2
Q
What is the average energy?
A
< E > =-1/Z dZ/dβ
3
Q
What is the average energy for a large system of N particles?
A
< E > =-NdlnZ1/dβ
4
Q
What does extensive mean?
A
Scales with system size
e.g. < E > =u and hence cV
5
Q
What does intensive mean?
A
Local properties
e.g. T
6
Q
What is the relative size of fluctuations?
A
σE/< E >
Which is proportional to sqrt(N)/N
