Surface Tension
DescriptionExp-1 To determine the surface tension of water by ring-pull out method.
Principle and Working:
Surface tension for water is determined using ring-pull out method. The experiment utilizes a force sensor on which a metal ring is suspended, which can be lowered or pulled out of water.
In the present setup, a metal ring is completely immersed in the liquid, so that the entire surface is wetted. The ring is than slowly pulled out of the liquid, drawing a thin sheet of liquid behind it. The liquid sheet tears when the tensile force exceeds a limit value,
F=σ 4πR,
where R denotes edge radius and σ surface tension of liquid.
A force sensor is used with computer interface to determine the tensile force in SK047 kit.
Contents:
| Cat. No. | Item Name | SK046 | SK047 |
| SW979 | Laboratory jack | 1 | 1 |
| SG101 | ‘A’ shaped base, small | 1 | 1 |
| SH323 | Rod, 75cm | 1 | 1 |
| CB208 | Bosshead | 1 | 1 |
| IMC23 | Vernier LabQuest mini | 1 | |
| IMC19 | Vernier force sensor | 1 | |
| IMC15 | Vernier logger lite software | 1 | |
| C7486 | Ring | 1 | 1 |
| SC227 | Beaker | 1 | 1 |
| R5023 | Vernier caliper | 1 | 1 |
| U20030 | Precision dynamometer | 1 |
- Vernier Labquest Mini IMC23
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SPECIFICATIONSComputer connection: USB 2.0 Full Speed
Maximum sampling rate: 100,000 samples per second
Analog inputs: 3
Digital inputs: 2
Power: USB -
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