Break-even point

  • Thread starter xinlan
  • Start date
  • #1
xinlan
61
0

Homework Statement



When discussing attempts to make any type of fusion into a workable power source, an important concept is the "break-even" point. The break-even point is reached when the fusion process generates as much energy as was initially put in (i.e., the energy output equals the energy input). The rest energy of a muon is 106 MeV. If this is the only energy input necessary to initiate muon-catalyzed fusion, how many reactions must a muon catalyze to attain the break-even point?


Homework Equations





The Attempt at a Solution



from the previous question, I got the energy per reaction is 17.6 MeV
so, the number of reactions needed = 106 / 17.6 = 6 reactions
but the feedback says that "This is very close to releasing the same amount of energy as was input, but we want more energy than was input."
I'm totally confused..

please help me..
 

Answers and Replies

  • #2
Phlogistonian
87
0
I think they want you to round up.
 
  • #3
xinlan
61
0
the real answer is 6.022,
I already rounded up to 6..
 
  • #4
Phlogistonian
87
0
the real answer is 6.022,
I already rounded up to 6..

No, you rounded down. ;)
 
  • #5
xinlan
61
0
oh my.. thank you so much to Phlogistonian.. :)
 
  • #6
Phlogistonian
87
0
Based on your answer, I guess they just wanted more significant figures. We didn't use these computer things when I was in school. We just used books, pencil, and paper. :)
 

Suggested for: Break-even point

Replies
4
Views
246
  • Last Post
Replies
2
Views
155
Replies
1
Views
311
  • Last Post
Replies
2
Views
355
  • Last Post
2
Replies
41
Views
1K
  • Last Post
Replies
3
Views
262
  • Last Post
Replies
3
Views
129
Replies
23
Views
345
Replies
20
Views
585
Replies
2
Views
369
Top