The sweetest, saltiest love song about how sodium and chlorine fell in love... https://youtu.be/9RVdcV8h5_8 A cute tune by the McGarrigle Sisters, telling the heartwarming story of salt - sodium and chlorine - falling in love. Perfect for high school and university chemistry lectures, complete with valences, electron shells and ionic bonding of NaCl.
Y'all have a great christmas and a very merry perihelion! https://youtu.be/3vBJb_53ppM
The Rubens Tube is a really complicated demo that seems simple. Once you start thinking about it you realise that sound antinodes are points of oscillating pressure, so the flames shouldn't be stable peaks - they should be going up and down at the frequency of the wave! And if you change the gas pressure … Continue reading Sound and fire = complicated!