# | Title | Image | Description | Video |
1 | Floating Metals |
Force of Suface Tension
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Place the needle on a bit of tissue and place on the surface of fresh water. Sink the tissue with a stick, leaving the needle floating. Add a little soap to sink the needle. |
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2 | Weigh Submerged Block |
Density and Buoyancy |
Weigh the block in air, then submerged in water. The difference is the buoyant force. |
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3 | Archimedes' Principle |
Density and Buoyancy |
A cylindrical mass and bucket are suspended from a spring scale above a beaker with an overflow spout. Note the scale reading. Submerge the mass by raising the beaker with the lab jack. Pour the water from the catch bucket into the hanging bucket to return to the original scale reading. You may also show that the mass exactly fits inside the hanging bucket. |