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The rubber band experiment can be modeled as a thermodynamic cycle as shown in the diagram. The stretching of the rubber band is an isobaric expansion (A → B) that increases the energy but reduces the entropy (this is a property of a rubber bands due to rubber elasticity). Holding the rubber band in tension at ambient temperature is an ...
A watermelon exploding under the pressure of rubber bands Rubber bands wrapped around a watermelon. The exploding watermelon stunt or exploding watermelon challenge involves wrapping rubber bands around a watermelon until the pressure of the rubber bands causes the watermelon to explode in a dramatic or spectacular fashion.
A sample in an ignition tube (also called a fusion tube) is attached to a thermometer with a rubber band, and immersed in a Thiele tube, water bath, or other suitable medium for heating. A sealed capillary, open end pointing down, is placed in the ignition tube. The apparatus is heated.
For instance, a rubber band is disordered in the initial state of this region. When stretching the rubber band, you also align the structure to be more ordered. Therefore, when releasing the rubber band, it will spontaneously seek higher entropy state hence goes back to its initial state.
In simple contexts, a single number may suffice to describe the strain, and therefore the strain rate. For example, when a long and uniform rubber band is gradually stretched by pulling at the ends, the strain can be defined as the ratio between the amount of stretching and the original length of the band:
A rubber band is a single molecule, as is a latex glove. The sections of polyisoprene between two adjacent cross-links are called network chains and can contain up to several hundred isoprene units. In natural rubber, each cross-link produces a network node with four chains emanating from it.
Hysteresis occurs in ferromagnetic and ferroelectric materials, as well as in the deformation of rubber bands and shape-memory alloys and many other natural phenomena. In natural systems, it is often associated with irreversible thermodynamic change such as phase transitions and with internal friction ; and dissipation is a common side effect.
Stephen Perry was a 19th-century British inventor and businessman credited with the invention of the rubber band. His corporation was the Messers Perry and Co,. Rubber Manufacturers of London, which made early products from vulcanised rubber, only recently perfected by Charles Goodyear in 1839. On 17 March 1845, Perry received a patent for the ...