Search

Boyle's Law Demo...


This variation on the many demos of Boyle's Law always gets a good reaction from my students.


It was devised by a particularly physics-fun-loving group of 6th years a few years ago. When I was running the standard partly-inflated-balloon version, they wanted to know if the same thing would work with a plastic bottle. I said it probably wouldn't, because I assumed the plastic would crack in a few places when it was crushed - but they persuaded me to try anyway and I'm glad they did.


Its actually astonishing how strong these bottles are. I've been able to re-inflate and re-crush the same bottle over and over again without any crack appearing. And the bottles have the advantage over balloons that they're everywhere! (I know that's not really a good thing - but they can be easier to put your hands on than a balloon, so its good educationally even if it is a environmental disaster...)


In retrospect, it seems like an obvious idea - and maybe everybody else has been doing this for years?


Either way, I had fun playing around with the viedo-editing software!

Recent Posts

See All

Lab Days 2022

The PDST are organising three lab-days for the spring (Covid allowing....) In the past these were an annual event, designed to help us all make the most of what facilities we have to let students bec