http://math.ucsd.edu/~mathclub/games/brainteaser-archive/chicken_mc_numbers.html McDonald's sells Chicken McNuggets in packs of 6, 9, 20. You could purchase, say, 21 nuggets through the purchase of two 6-packs and one 9-pack. You cannot, regardless of how clever, purchase exactly ten nuggets. ...
Ultrafast vibrational dynamics of interfacial water Avishek Ghosh a, Marc Smits a, Maria Sovago a, Jens Bredenbeck a,1, Michiel Mu ller b, Mischa Bonn a,* Chemical Physics 350 (2008) 2330 摘要 We report investigations of the vibrational dynamics of water molecules at the water&ndas ...
Is the liquid water surface basic or acidic? Macroscopic vs. molecular-scale investigations 摘要 Many physical phenomena are affected by the intrinsic acidity/basicity of the free liquid water surface, yet it remains an active and controversial subject. Macroscopic bubble and droplet experiments ...