/sci/ - Science & Math

>>	Anonymous Wed Jan 25 23:48:27 2012 No.4293260 [View] File: 39 KB, 350x349, escalator.gif [View same] [iqdb] [saucenao] [google] hey /sci/, chemistry question how can I assign oxidation numbers to ZnS in the equation: 2ZnS + 3O2 = 2ZnO + 2SO2 Pic unrelated

kilo !h55/E7mIo6 Thu Jun 9 09:33:13 2011 No.3198137 [View]
File: 39 KB, 350x349, escalator.gif [View same] [iqdb] [saucenao] [google]

Why do escalators run on independent motors? Most often they are paired, so it would seem you could save a lot of energy if they were connected. They could be designed so one could be disconnected for maintenance.

Posted this a few months ago but no answers.

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