by Anonymous on February 8th, 2007

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Q[1-exp(-xt)] / [1+exp(-x*t)] do you know what this equation calculates?

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by Quirkie on February 8th, 2007
The equation is that of Q tanh (x t / 2)

tanh is the hypobolic tangent, pronounced "than".

It could be calculating many things ... the presence of 't' in there tho makes me think it could be representing the equation for the speed of a falling body in the presence of quadratic drag. Q is the terminal velocity.

See also
http://www.tfn.net/~jcarr/Physics/drag/drag4.html
http://mathworld.wolfram.com/HyperbolicTangent.html
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by Hyper on February 9th, 2007
No.
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by jangobean on February 8th, 2007
mmmm....no
....tell me
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- Max velocity v, the velocity at burnout of a rocket! i'm bored.
  
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  by Anonymous on February 8th, 2007
- Did you work that out yourself?
  
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  by jangobean on February 8th, 2007
- well you need variables
  
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  by Anonymous on February 8th, 2007
- heyy heyyy I'm impressed.
  What exactly does this all mean?
  
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  by jangobean on February 8th, 2007
- quirckie took the words right out of my mouth
  
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  by Anonymous on February 8th, 2007
- Then maybe you should have given him some points, that is the way things usually work around here when you get a good answer to your question...
  
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  by TheKnife V2.1 - Grandiose and Obnoxious on March 2nd, 2007
- really? i never knew. how bout that. points. thanks for enlightening me.
  
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  by Anonymous on March 3rd, 2007
- No problem, now you have learnt how the site works - and it only took you two months!
  
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  by TheKnife V2.1 - Grandiose and Obnoxious on March 3rd, 2007
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Q[1-exp(-xt)] / [1+exp(-x*t)] do you know what this equation calculates?

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