Archive for March 4th, 2013
I stumbled upon these videos thanks to CGP Grey who hosts wonderful and interesting videos about society in general. I highly suggest watching them.
The following two videos tackle the question of how trees “drink” water. We all know from grade school that trees drink water through their roots. What you might not know is that, thanks to physics, there is a limit to how far water can be sucked upwards through a tube, thanks to gravity and pressure, which is about 10 meters, or around 32 feet. If you’re curious about the science of this limitation, there is a video here by the same guy. The math is explained at the end.
However that is all just background. Over the following two videos, Veritasium is going to take you through the scientific process of discovering how trees drink water, and how trees over thirty two feet manage to get water all the way to their top most leaves. It is well worth watching: