| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 2B20.00 | Static Presssure | | |
| 2B20.10 | pressure independent of direction | PIRA 200 | Insert a rotatable thistle tube with a membrane into a beaker of water. |
| 2B20.10 | pressure independent of direction | 2B20.10 | A thistle tube covered with a diaphragm and connected to a manometer is lowered into water and oriented in different directions. |
| 2B20.10 | pressure independent of direction | Fa-1 | A rubber membrane covers a thistle tube connected to a manometer. The assembly is inserted into a beaker of water and oriented in various directions. |
| 2B20.10 | pressure independent of direction | Disc 12-04 | Membrane on a tube connected to a manometer. |
| 2B20.11 | pressure independent of direction | M-273 | Three thistle tubes filled with colored alcohol and capped with rubber membranes are joined with the thistle ends bent to be oriented in various directions. Immerse in water to show equal pressure. Or, one tube may be turned to show the same thing. |
| 2B20.15 | pressure dependent on depth | PIRA 1000 | |
| 2B20.15 | pressure dependent on depth fallacy | AJP 32(1),xiv | The manometer used in the demonstration is calibrated on the basis of the law under investigation. |
| 2B20.15 | pressure dependent on depth | M-20b.1 | Lower a small funnel covered with a rubber membrane attached to a manometer into a water filled vessel. |
| 2B20.15 | Pressure vs. depth | Disc 12-02 | A pressure sensor is connected to a LED bar graph. |
| 2B20.16 | pressure vs. depth in water and alcohol | PIRA 1000 | |
| 2B20.16 | pressure vs. depth in water and alco | Disc 12-03 | The electronic pressure sensor and LED bar graph display are used first in water, then in alcohol. |
| 2B20.17 | electronic depth dependence | AJP 56(7),620 | A circuit based on the Motorola MPX100AP pressure sensor displays a pressure depth curve on an XY recorder. An interesting feature is the use of two liquids showing a change of slope at the interface. |
| 2B20.20 | dropping plate | PIRA 500 | |
| 2B20.20 | dropping plate | 2B20.20 | |
| 2B20.20 | dropping plate | Fc-1 | Pressure holds a glass plate on the bottom of a glass tube inserted into a beaker of water until the pressure is equalized by another fluid poured into the tube. |
| 2B20.20 | dropping plate | 16-4.2 | A thin glass plate stays at the bottom of a glass tube immersed in water and water is poured into the tube until the plate drops off. |
| 2B20.20 | dropping plate | M-276 | Water pressure holds a plate against the bottom of a glass cylinder in a beaker of water. Pour water into the cylinder until the plate drops off. A variation uses a lead plate. |
| 2B20.25 | Pascal's paradox | PIRA 1000 | |
| 2B20.25 | Pascal's paradox | M-277 | Two identical truncated cones are in equilibrium on a platform balance, one small end down, the other large end down. Replacing the bottoms with rubber diaphragms and supporting only the extended diaphragms on the scale does not give equilibrium. |
| 2B20.26 | lateral hydrostatic pressure | 16-4.10 | An inverted funnel with a cork on the stem floats in a beaker of water. When pushed down into a layer of mercury, it stays; but if the stem is immersed, it floats back up. |
| 2B20.27 | hydrostatic paradox - vector analysi | AJP 59(1),89 | Use the hydrostatic paradox to introduce vector analysis instead of some electromagnetism example. |
| 2B20.30 | weigh a water column | PIRA 1000 | |
| 2B20.30 | weigh a water column | 2B20.30 | Same as AJP 28(6),557. |
| 2B20.30 | weigh water in a tube | AJP 28(6),557 | Suspend a tube from a springscale in a beaker of water and suck water up into the tube. Why does the scale reading increase? |
| 2B20.30 | hydrostatic paradox | 16-4.9 | Suspend a tube, open at the bottom, from a spring scale in a beaker of water and partially evacuate the air from the tube. |
| 2B20.32 | chicken barometer | PIRA 1000 | |
| 2B20.32 | chicken barometer | 2B20.32 | |
| 2B20.32 | chicken barometer | 2B20.32 | |
| 2B20.34 | hydrostatic paradox - truncated cone | PIRA 1000 | |
| 2B20.34 | hydrostatic paradox | Disc 12-08 | A glass plate is held against the large end of a truncated cone when it is placed under water. The plate drops away when placed against the small end. |
| 2B20.35 | weigh a barometer | Fd-3 | A barometer tube is weighed empty and filled with mercury, then inverted in a vat of mercury and weigh again. |
| 2B20.35 | weigh a barometer | 16-4.8 | A spring scale, barometer tube, and mercury in a glass tube that can be evacuated. |
| 2B20.40 | Pascal's vases | PIRA 200 | Six tubes of various shapes are connected to a common water reservoir. |
| 2B20.40 | Pascal's vases | 2B20.40 | A set of tubes of different geometries rising from a common reservoir of water. |
| 2B20.40 | Pascal's vases | Fa-3 | A common reservoir connecting several weirdly shaped tubes. |
| 2B20.40 | Pascal's vases | M-275 | Tubes of various shapes rise from a common horizontal tube. When filled with water, the level is the same in each tube. |
| 2B20.40 | Pascal's vases | M-22f.1 | Six tubes of various shapes are connected to a common water reservoir. |
| 2B20.40 | same level tubes | Disc 12-01 | A commercial device. |
| 2B20.42 | Pascal's vases | Fa-2 | A commercial device with a pressure gauge and interchangeable vessel shapes. |
| 2B20.42 | Pascal's vases | M-22e.2 | Vessels of various shapes are interchangeable on a base equipped with a pressure gauge. |
| 2B20.43 | simplified hydrostatic paradox | AJP 53(11),1106 | Replace the sloped side vessels with stepped sides that include only horizontal and vertical components. |
| 2B20.45 | water level | Fa-4 | Two open tubes are connected by a long water filled hose. |
| 2B20.50 | Pascal's fountain | PIRA 1000 | |
| 2B20.50 | Pascal's fountain | Fb-2 | A piston applies pressure to a round glass flask with small holes drilled at various points. |
| 2B20.50 | Pascal's fountain | M-271 | Water squirts out equally in all directions when forced out of a sphere by a tube fitted with a piston. |
| 2B20.51 | Pascal's fountain | Fb-1 | A piston applies pressure to a flask with vertical jets originating at various points on the flask. |
| 2B20.52 | Pascal's diaphragms | M-272 | A closed container has several protruding tubes capped with rubber diaphragms. Push on one and the others go out. |
| 2B20.53 | squeeze the flask | 16-2.3 | Squeeze a flask capped with a stopper and small bore tube. |
| 2B20.60 | hydraulic press | PIRA 500 | |
| 2B20.60 | hydraulic press | 2B20.60 | A hydraulic press is used to break a piece of wood. |
| 2B20.60 | hydraulic press, etc. | M-282 | Use a large hydraulic press to break a 2x4. Glass models show the action of valves of suction and force pumps. |
| 2B20.60 | hydraulic press | M-20e | A hydraulic press with a pressure gauge breaks a board or compresses a large spring. |
| 2B20.60 | hydraulic press | Disc 12-07 | Break a piece of wood in a hydraulic press. The press has a pressure gauge. |
| 2B20.61 | two syringes | PIRA 1000 | |
| 2B20.61 | two syringes | Fb-3 | Two syringes of different size are hooked together and passed around the class for students to feel the pressure difference. |
| 2B20.62 | hydraulic can crusher | PIRA 1000 | |
| 2B20.65 | garbage bag blowup | PIRA 1000 | |
| 2B20.65 | garbage bag blowup | 2B20.65 | |
| 2B20.65 | air pressure lift | Disc 11-17 | Lift a person supported by two hot water bottles by blowing them with the mouth. |
| 2B20.66 | weight on a beach ball | PIRA 1000 | |
| 2B20.66 | weight on a beach ball | 2B20.66 | Place a 45 lb weight on a circular wood disc on a beach ball and blow up the beach ball per os. |
| 2B20.66 | weight on the beach ball | 16-4.6 | Lift a 25 lb weight with your lungs by blowing it up on a beach ball. |
| 2B20.66 | incompressibility of liqiuds | M-268 | Pound in a nail with a bottle completely filled with boiled water. |
| 2B20.67 | hydraulic balance | M-274 | A 2m vertical glass tube is connected to a hot water bottle. Have students sit on the bottle. |
| 2B20.70 | compressibility of water | PIRA 1000 | |
| 2B20.70 | compressibility of water | Fn-1 | A piston in a heavy walled glass cylinder is screwed in causing mercury to move in a capillary in a second enclosed container. |
| 2B20.70 | compressibility of water | 16-3.1 | A heavy walled glass cylinder filled with water is pressurized mechanically and mercury in the capillary tube of a internal water bottle indicates the compression. |
| 2B20.70 | compressibility of water | M-270 | An apparatus to show compressibility of water. |
| 2B20.71 | water/air compression | PIRA 1000 | |
| 2B20.71 | water/air compression | Disc 12-05 | A syringe filled with air is compressed when a large weight is placed on it, but a water filled syringe does not compress. |
| 2B20.72 | Weinold piezometer | 16-3.3 | Diagram. Complicated and delicate. |
| 2B20.75 | near-incompressibility of water | 16-3.2 | Shoot a .22 at a water filled half pint paint can and the cover flies off. ALSO - Hammer a nail with the side of a glass bottle filled with water. |
| 2B20.76 | incompressibility of liquids | M-269 | With a hammer, strike the stopper of a large bottle completely filled with water and shatter the bottle. |
| 2B20.80 | hovercraft | PIRA 500 | |
| 2B20.80 | hovercraft | 2B20.80 | |