I got distracted from my usual wildlife watching today by some exceptionally loud bangs and explosions. It was all in the name of science outreach.|
One of the campus roads was closed off while Professor Hal Sosabowski and colleagues demonstrated the science of gas expansion with bottles of super-cooled carbon dioxide and liquid nitrogen. Basically (and I am no scientist) the supper cool gases are crammed into a tight space and expand as they heat up causing a massively loud explosion. The carbon dioxide (sequence hear expands to 50 atmosphere’s of pressure. The bottle can contain a mere 5 atmospheres. Hence… yes, you can work it out.
And then on to the powerful stuff.. liquid nitrogen.
For more on ‘Dr Hal’ and educational tools and experiments you can do at home, see here.
Camera note: all photos taken with the Canon 7D Mark II and EF 100-400mm f/4.5-5.6L IS II USM lens.