2A15.25 Surface Energy

2A15.25 Surface Energy

A soap film on an inverted funnel ascends.

Note: Make sure to submerge the funnel in order to wet the inside with the soap solution.

Note: Works better with a funnel of about 5cm in diameter.

For a good primer on soap solutions, click here.

A hand holds an inverted glass funnel over a beaker of soap solution.

A close-up of an inverted glass funnel posed over a beaker of soap solution reveals a soap film gleaming on the inside of the funnel. The film appears to adhere to the sides of the funnel, and only extends about half-way down the inverted funnel from the stem.

Soap film in the funnel.

 

Location: Funnel: U3-5