A piece of glass is scratched with a diamond-tipped stylus, showing that diamond is harder than glass.
The relative viscosity of 1-pentanol can be measured using a stopwatch, and compared to other liquids.
The relative viscosity of 2,2,4-trimethylpentane can be measured using a stopwatch, and compared to other liquids.
This is an introductory movie showing, in wider angle, the manner in which the experiment for measuring relative viscosity is performed.
Four funnels are connected to differing lengths of capillary tubing. The greater the length of the capillary tube, the longer it takes for the water to flow through the apparatus.
The flow of four different liquids from four pipets is started simultaneously to test their viscosity.