Q: Units

09092016, 03:21 PM
Post: #1




Q: Units
Hi,
I did some experiment with constants and units in CASMode but did not understand the result. Could somebody please explain: entered 1/SQRT(E_0*µ_0) without units and got 299792458, which seems to be the speed of light > correct. (Of course SQRT ist the squarerootkey and everything is printed nicely on screen) Tried the same _with_ the builtin constants and units: 1  SQRT(8.85..._F/m *1,2..._H/m) leads to 8.98E16_m²/(F*H) It seems to me, the squareroot did not get evaluated... Adding MKSA() into the root gives 8.98...E16_m²/s² sqrt(8.98...E16_m²/s²) again leads to the result I expected in first place. The speed of light with correct units... can somebody please tell me what I'm doing wrong? 

09092016, 03:35 PM
Post: #2




RE: Q: Units
Äh...
in home it gives Error: Invalid input. But when adding MKSA() into the squareroot, it works correctly. 

09132016, 10:37 AM
Post: #3




RE: Q: Units
... well, as can be shown using "Get from home"/Get from CAS, it is simply a bug of the CAS. It does not process the root and gives a wrong result.


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