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a while back I was asking about this, I can't find the thread but I figured I would post this here just incase someone like me can find it searching through google.

You have to use these special velocity addition formulas.

like this:

http://img704.imageshack.us/img704/267/screenshot20091206at124.png

then you find out the 0.75c+0.75c = 0.96c

(0.75c+0.75c)/(1+(0.75c*0.75c)/c^2)=

c(1.5)/(1+0.3249)=0.96 c

You have to use these special velocity addition formulas.

like this:

http://img704.imageshack.us/img704/267/screenshot20091206at124.png

then you find out the 0.75c+0.75c = 0.96c

(0.75c+0.75c)/(1+(0.75c*0.75c)/c^2)=

c(1.5)/(1+0.3249)=0.96 c

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