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19 November 2009
- 15:1515:15, 19 November 2009 diff hist +543 Wikipedia:Reference desk/Science →Vacuum-Forming PMMA (Acrylic): Probably
- 04:5704:57, 19 November 2009 diff hist +248 Wikipedia:Reference desk/Miscellaneous →Faulty cds- any uses?: new section
18 November 2009
- 00:5000:50, 18 November 2009 diff hist +291 Wikipedia:Reference desk/Archives/Science/2009 November 14 →Schrödinger's cat - can you actually stop observing it?: ANY interaction with the universe is deemed an 'observation'
- 00:3900:39, 18 November 2009 diff hist +16 Low-pass filter →Examples of low-pass filters: rearrange
- 00:3300:33, 18 November 2009 diff hist −138 Low-pass filter rm repeated image
- 00:3000:30, 18 November 2009 diff hist +276 Wikipedia:Reference desk/Science →tuned circuit: just use a passive RC