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- From: darice@yoyo.cc.monash.edu.au (Fred Rice)
- Newsgroups: sci.physics
- Subject: Re: What are the conditions for Mass <-> Energy conversion
- Message-ID: <1992Dec30.004422.13020@monu6.cc.monash.edu.au>
- Date: 30 Dec 92 00:44:22 GMT
- References: <8091@tekig7.PEN.TEK.COM> <1992Dec26.134900.7041@hubcap.clemson.edu> <1992Dec28.024210.17537@monu6.cc.monash.edu.au> <1992Dec29.154112.1@sscvx1.ssc.gov>
- Sender: news@monu6.cc.monash.edu.au (Usenet system)
- Organization: Monash University, Melb., Australia.
- Lines: 25
-
- In <1992Dec29.154112.1@sscvx1.ssc.gov> draper@sscvx1.ssc.gov writes:
-
- [...my stuff deleted...]
-
- >That's because equation 6 is wrong.
- >What you probably meant to say is that conservation of energy demands
- >E^2 = (E1 + E2)^2
- >so that
- >E^2 = p^2 = p1^2 + m1^2 + p2^2 + m2^2 + 2E1E2
- >and since by conservation of momentum
- >p = p1 + p2
- >we then get
- >p1^2 + p2^2 + 2p1p2cos(A) = p1^2 + m1^2 + p2^2 + m2^2 + 2E1E2.
- >Solving for cos(A) gives
- >cos(A) = [m1^2 + m2^2]/2p1p2 + E1E2/p1p2
- >Now as long as m1 and m2 are nonzero, the first term on the right is
- >positive-definite and the second term is greater than 1. Thus there is no real
- >solution for A.
-
- Ah yes, I see my error now!
-
- Thanks for correcting my math.
-
- Fred Rice
- darice@yoyo.cc.monash.edu.au
-