Fluid Mechanics
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2A10.20 |
SURFACE TENSION |
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Force of Surface Tension |
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Floating Metals |
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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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2B20.40 |
STATICS OF FLUIDS |
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Static Pressure |
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Pascal's Vases |
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Disc 12-01 |
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Water levels in different shaped containers attached to a common reservoir will reach the same height no matter what the shape of the container. |
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2B30.10 |
STATICS OF FLUIDS |
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Atmospheric Pressure |
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Crush the Can |
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Disc 12-01 |
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Pour an inch of water into the can. Set it on a stand and start the gas burner. Let it boil for a while to displace all the air. Use insulated gloves to tighten the cap onto the can and at the same time, turn off the heat. Spray it with water to cool it faster. If the cap is tight, and as the steam inside cools and contracts, the can will collapse from atmospheric pressure. |
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2B30.30 |
STATICS OF FLUIDS |
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Atmospheric Pressure |
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Disc 11-12 |
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Make sure the valve is open. Turn on the vacuum pump to evacuate the hemispheres. Shut the valve and remove the hose. Have two students try to pull the hemispheres apart. You may also use your lungs to create a partial vacuum or a hand pump. |
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2B35.30 |
STATICS OF FLUIDS |
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Measuring Pressure |
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Manometers |
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Simple water and mercury manometers. |
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2B40.10 |
STATICS OF FLUIDS |
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Density and Buoyancy |
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Weigh Submerged Block |
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Disc 12-11 |
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Weigh the block in air, then submerged in water. The difference is the buoyant force. |
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2B40.20 |
STATICS OF FLUIDS |
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Density and Buoyancy |
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Archimedes' Principle |
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Disc 12-12 |
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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. |
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2C10.10 |
DYNAMICS OF FLUIDS |
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Flow Rate |
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Torricelli’s Tank |
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Water streams from holes at different heights in a vertical acrylic tube.
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2C20.15 |
DYNAMICS OF FLUIDS |
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Bernoulli Force |
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Bernoulli / Venturi Tubes |
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Air flows through a restricted tube. Manometers show the pressure differences. |
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