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    $\begingroup$ Not to unnecessarily quibble, but isn't it the difference in specific heat capacity what is dwarfed. It is the difference in heat capacity that matters, which is a product of the mass difference and the s.h.c. difference... right? $\endgroup$
    – Dancrumb
    Commented Feb 13, 2018 at 1:13
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    $\begingroup$ "So there's about 30 times of difference in mass in addition to 5 times difference in specific heat capacity." In multiplication, more like. $\endgroup$
    – M i ech
    Commented Feb 13, 2018 at 9:12
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    $\begingroup$ @Dancrumb Yes, that word was really missing, thanks! I also fixed the controversial "in addition" part, though "in multiplication" doesn't sound like good English to me. $\endgroup$
    – Dmitry Grigoryev
    Commented Feb 13, 2018 at 15:37
  • $\begingroup$ There's also an extra factor of ~2 if you actually grab the foil, because you're probably touching a lot of the same area on both sides with thumb and fingers. (But I guess by the time you start worrying about that you might have to worry about conductivity in the aluminum, i.e. drawing heat from a larger area of foil than you're touching.) $\endgroup$
    – Cascabel
    Commented Feb 14, 2018 at 17:26
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    $\begingroup$ "compounded with" might work also work in place of "in addition". $\endgroup$
    – Eric
    Commented Feb 17, 2018 at 1:46