Mean Energy Fluctuations

  • #1
Hello!

I'm getting muddled with the notation in my notes, in which I have

[tex]\overline{(E-\overline{E})(P-\overline{P})}[/tex]

From which you can get

[tex] \overline{EP} - \overline{E} \ \overline{P}[/tex]


I can see where these come from, but not where the

[tex]\overline{E \overline{P}} - \overline{\overline{E} P}[/tex]

terms vanished to?
 
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Answers and Replies

  • #2
Bill_K
Science Advisor
Insights Author
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[tex] \overline{EP} - \overline{E} \ \overline{P}[/tex]

I can see where these come from, but not where the

[tex]\overline{E \overline{P}} - \overline{\overline{E} P}[/tex]

terms vanished to?
[tex]\overline{E \overline{P}} = \overline{\overline{E} P} = \overline{E} \ \overline{P}[/tex]

so they cancel out.
 
  • #3
Great thank you!
 

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