How do I create nested numbered lists? I want something that looks sort of like: yada yada for item 1 yada yada for item 2 a. yada yada for item 2a b. yada yada for item 2b yada yada for item 3

I never thought that modern American nickels actually contained nickel anymore. However, according to this site, the coins actually do contain 25% Nickel, the rest being copper. And yet, No US coin is officially magnetic. Why is this alloy of Nickel not attracted to a magnet? (and yes, I tried ...

Is anyone aware of reliable resources (ideally public) which allow the user to download the raw spectroscopic data such as infrared spectrum of small organic molecules, or rotational spectrum of HCl/DCl mixtures or NMR spectra of molecules? I was looking at the NIST database but apparently there ...