Vacuum Cannon

2B30.70 • C+30+68

diagram for demo

Vacuum Cannon. Tube is 4ft long with caps being closed off on either end by clear packing tape. When the tube is evacuated, the tape is punctured and the incoming air propels the ping pong ball through the tape on the opposite end towards the aluminum can target. Speeds of up to 287m/s can be achieved. This gives a muzzle KE of the ping pong ball equivalent to or greater than a .22 caliber handgun. FLUID STATICS

Related Demos

2B30.30 Magdeburg's hemispheres(cast iron) evacuated, can't be separated. 2B30.36 Suction cup holds large mass suspended from heavy glass plate. 2B30.25 Collapse 1 gallon metal can with vacuum pump.
C+30+110 Illustration of buoyancy and drag force C+30+18 Fist in and out of water C+30+85 Drag demo with coffee filters C+30+54 Interconnected tube of various elevations with immiscible liquids. C+30+115 Ice is sliced in two by wire creating high pressure. C+30+62 Mat held down by atmospheric pressure. C+30+11 Incompressibility of water in two different sized syringes 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+15 Archimedes' principle: Cup and plug on balance beam. C+30+17 Archimedes' principle: weighing beakers in 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+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+65 Collapse 1 gallon metal can with vacuum pump. C+30+70 The weight of air. C+30+75 Vacuum hoist, working model. C+30+80 Inversion table and blood pressure monitor 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