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Student Support Forum: '√(-1/m)*√(-m) -Bug with symbolic Va...' topicStudent Support Forum > General > "√(-1/m)*√(-m) -Bug with symbolic Va..."

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Author Comment/Response
Yukterez
05/11/12 12:10pm

Sometimes I get some strange Units in the Output, appendixes like Sqrt[-1/m]*Sqrt[-m] which could easily cancel each other out, but they dont; even when I use the Simplify/FullSimplify Command. It looks like

[img]http://666kb.com/i/c3pfz8u4ig160fr9q.png[/img]

while it sholud look like "895.78 sek"

_____________________________

c = 299792458 m/sek;
G = 6.67384*10^-11 m^3/kg/sek^2;
M = 5.977*10^24 kg;
r2 = 6378000 m;
rs = 2*G*M/c^2;
r1 = rs;

\[Tau] =
1/c*\!\(
\*SubsuperscriptBox[\(\[Integral]\), \(r1\), \(r2\)]\(
\*FractionBox[\(1\),
SqrtBox[\(
\*FractionBox[\(rs\), \(r\)] -
\*FractionBox[\(rs\), \(r2\)]\)]] \[DifferentialD]r\)\)

_________________________

Then it gives me the right solution, but appendet with unneccessary Sqrt[-1/m]*Sqrt[-m]instead of shortening it to -1...


Attachment: beschleunigung.nb, URL: http://yukterez.ist.org/beschleunigung.nb,

Subject (listing for '√(-1/m)*√(-m) -Bug with symbolic Va...')
Author Date Posted
√(-1/m)*√(-m) -Bug with symbolic Va... Yukterez 05/11/12 12:10pm
Re: √(-1/m)*√(-m) -Bug with symboli... Bill Simpson 05/11/12 11:27pm
Re: √(-1/m)*√(-m) -Bug with symboli... toen 05/12/12 00:57am
Re: √(-1/m)*√(-m) -Bug with symboli... Yukterez 05/12/12 4:36pm
one problem (or bug) remains Yukterez 05/14/12 9:49pm
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