The weight of air.
2B40.40 • C+30+70
The Weight of Air. A spherical container of air hangs balanced on a balance beam in a bell jar filled with air. When the vacuum pump is used to remove the air from the bell jar, the buoyant force on the sphere is removed and the sphere sinks. FLUID STATICS
Related Demos
C+30+0 Revolving 'drumhead' with manometer shows pressure in water tank. C+30+5 Magdeburg's hemispheres(cast iron) evacuated, can't be separated. C+30+10 Hydraulic jack with pressure gauge, breaks 2"x 2" piece of wood. C+30+11 Incompressibility of water in two different sized syringes C+30+15 Archimedes' principle: Cup and plug on balance beam. C+30+17 Archimedes' principle: weighing beakers in water. C+30+18 Fist in and out of water C+30+20 Archimedes' principle: Fish submerged in water on balance beam. C+30+25 Archimedes' principle: Aluminum and brass cylinders. C+30+30 Film loop: "Archimedes' principle", 3:40 min. C+30+35 Cartesian divers: Pressure on cap sends divers sinking. C+30+40 Torricelli Barometer: Column of mercury in bell jar. C+30+45 Large model of aneroid barometer. C+30+50 Pascal's vases: Water in removable vases with pressure gauge. C+30+52 Interconnected set of glass vases of different shapes. C+30+53 Interconnected tube with immiscible liquids. C+30+54 Interconnected tube of various elevations with immiscible liquids. C+30+55 Working model of the lung: Balloons in a bell jar over a diaphragm. C+30+60 Suction cup holds large mass suspended from heavy glass plate. C+30+62 Mat held down by atmospheric pressure. C+30+65 Collapse 1 gallon metal can with vacuum pump. C+30+68 Vacuum Cannon C+30+75 Vacuum hoist, working model. C+30+80 Inversion table and blood pressure monitor C+30+85 Drag demo with coffee filters C+30+85 Applet: Buoyancy C+30+90 Applet: Density C+30+95 Applet: Fluid Pressure and Flow C+30+100 Applet: Buoyant Force C+30+105 Applet: More Buoyancy C+30+110 Illustration of buoyancy and drag force C+30+115 Ice is sliced in two by wire creating high pressure.