Cohesion demonstrator
A device to demonstrate cohesive forces: freshly cleaned lead surfaces adhere and support a suspended load.
Molecular physics demonstration apparatus consisting of 8 components: rotating handle, screw rod, clamping bar, hollow lead cylinder, rotating scraper, clamping device, lever and weight hanging cord. Designed for 4 demonstrations: intermolecular forces of attraction in solids, joining freshly cleaned lead surfaces due to cohesion, assessing joint strength by hanging a load, and the effect of compression force on adhesion strength using a screw clamp.
- 1.Rotating handle - 1 pc.
- 2.Screw rod - 1 pc.
- 3.Pressing bar - 1 pc.
- 4.Hollow lead cylinder - 2 pcs.
- 5.Rotary scraper - 1 pc.
- 6.Clamping device - 1 pc.
- 7.Lever - 2 pcs.
- 8.Cord for suspending a mass - 1 pc.
- Cohesive forces (intermolecular attraction) in solids
- Bonding freshly cleaned lead surfaces through cohesion
- Assessing the strength of a cohesive bond by hanging a load or pulling
- The influence of compression force on the strength of a cohesive joint: obtaining a particularly strong bond using a screw clamping device
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