Surface Tension

Equipment:

·       Set of Newton spring with scale.

·     Liquid container.

·     Jack laboratory.

·     Metal wire ring with different diameter.

·     Other Metal wire frames.

·     metallic base

·     Metallic stand 100cm

·     Multi clamp

Description

·     To determine the surface tension of a liquid, a ring that is attached to a torsion meter by means of a silk thread is dipped into the liquid.

·      The liquid level is lowered and the force that acts on the ring just before  the liquid film tears is measured.

·      The surface tension can be calculated from the diameter of the ring and the    tear-off force.