Accessing and using built-in constants in Mathematica 6 / precision
- To: mathgroup at smc.vnet.net
- Subject: [mg86463] Accessing and using built-in constants in Mathematica 6 / precision
- From: ratullochjk2 at gmail.com
- Date: Wed, 12 Mar 2008 00:10:09 -0500 (EST)
Accessing and using built-in constants in Mathematica 6 / precision tia sal2 Greetings all Sorry if this is a repeat post my last post didn't show up in the newsgroups I can access the constants for the elements with no problem Example: In[1]:= ElementData["C", "AtomicWeight"] Out[2]:= 12.0107 1) I'm trying to use the built in constants for speed of light, Plank's constant, etc.. but I'm having problems finding them / the proper syntax. 2) Also How do I increase the amount of the decimal places? Example: elementatomicW := ElementData["C", "AtomicWeight"] << Units` Convert[elementatomicW AMU, Kilogram] The answer is 1.99443*10^-26 Kilogram I add N like it says but the answer still comes out the same Example: << Units` N[Convert[elementatomicW AMU, Kilogram], 20] tia sal2