Balloon a wide range of applications. The rubber balloon was invented by Michael Faraday in 1824, during experiments with various gases. Balloon decorating Balloons are used for decorating birthday parties, weddings, corporate functions, school events, and for other festive gatherings. The artists who use the round balloons to build are called "stackers" and the artists who use pencil balloons to build are called "twisters." Most commonly associated with helium balloon decor, more recently balloon decorators have been moving towards the creation of air-filled balloon decorations due to the non-renewable natural resource of helium limited in supply. The most common types of
Two-balloon experiment a similar way as the balloon expands. Because rubber strongly resists volume changes, the volume "V" can be considered constant. This allows the stress-strain relation to be written where λ=L/L is the relative extension. In the case of a thin-walled spherical shell, all the force which acts to stretch the rubber is directed tangentially to the surface. The radial force (i.e., the force acting to compress the shell wall) can therefore be set equal to zero, so that where "t" and "t" refer to the initial and final thicknesses, respectively. For a balloon of radius formula_4, a fixed volume of