Garden Science - The waterproof hanky (University of Birmingham)

An investigation into the surface tension of water, using household items. This surprising trick is a great excuse to threaten to pour water over your family. Put their trust to the test as you turn a full glass of water upside down over their head!

Abstract

An investigation into the surface tension of water, using household items, this surprising trick is a great excuse to threaten to pour water over your family. Put their trust to the test as you turn a full glass of water upside down over their head!

Equipment:

• Small hanky or cloth (without large holes or tears)

• Plate (for dramatic effect – not essential!)

• Glass or plastic container

• Water Cling film

• Skewer or similar object to pierce cling film