Wikipedia:Reference desk/Archives/Science/2020 February 25

= February 25 =

Apple picture
Are the apples in the thumbnail really Bramley apples? They look too round (not lumpy enough) and too red. -- SGBailey (talk) 08:25, 25 February 2020 (UTC)
 * The indentation in the lower right of the middle one looks quite Bramleyish to me, though they have more red colouring than I would expect. The photo comes from (or is the same as one on) a supplier's website, which may make the identification more plausible. No doubt they would choose the most photogenic and least lumpy specimens. AndrewWTaylor (talk) 11:01, 25 February 2020 (UTC)
 * There is such a thing as a Crimson Bramley which looks similar the one above, but the common or garden variety is generally more green than red. Alansplodge (talk) 22:14, 27 February 2020 (UTC)

What's the highest molecular mass liquid that is less viscous than water?
At 20 Celsius and 1 atmosphere. Sagittarian Milky Way (talk) 09:59, 25 February 2020 (UTC)
 * this chart might be helpful, though they're not all at 20ºC. I'd pick out chloroform from this chart. --jpgordon&#x1d122;&#x1d106; &#x1D110;&#x1d107; 17:12, 25 February 2020 (UTC)
 * n-Decane beats anything on that chart but not 2 carbons longer. What kind of compound is a good bet? Perhaps a maximally compact, maximally fluorinated branched alkane or alkene or silicane/ene of the right size? Sagittarian Milky Way (talk) 18:43, 26 February 2020 (UTC)
 * Anything of interest on List of viscosities? DMacks (talk) 06:00, 27 February 2020 (UTC)
 * Completely fluorinated hexane beats the list. Straight chain heptane hexadecafluoride is 1% too thick, isomer viscosities aren't easy to find. Sagittarian Milky Way (talk) 03:02, 28 February 2020 (UTC)