The answer to your second question is this no. Exact mechanism varies with material. Simple materials non-organic are easier to analyze. Simplest answer is if you bring them together they will join, provided size is small. For example in Cold Welding less than 10 nm wire is rejoined just by contact. The exact mechanics depends on what kind of Intermolecular force is in play. To my mind it appears that the difference is only imaginary and not real.
Rigidity and plasticity are not absolute terms but relative, and all solids are in fact both rigid and plastic. The apparent contrast between the two properties belongs to the laboratory and to those phenomena of nature involving small masses and small forces. When great masses and great forces are involved, as for example in the making of continents and mountain chains, the distinction loses value.
The phenomena of mountain structure demonstrate that under sufficient strains great bodies of rock both bend and flow. Its some what explained in this video. Sign up to join this community.
The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. When I stretch a rubber band, it breaks. When I hold the broken ends together, why doesn't it join again? Ask Question. Asked 7 years, 8 months ago.
Active 5 years ago. Viewed 8k times. Improve this question. BMS Prem kumar Prem kumar 2, 2 2 gold badges 15 15 silver badges 32 32 bronze badges. As in, why should it join together again? As in, a solid has low-cohesive bonds, that do little to mingle when two bodies are conjoined. The cohesive bonds of a liquid mean that two bodies of that liquid will merge, when conjoined. A similar process that also adds ultrasonic energy is often used to connect the tiny gold or aluminum bond-wires between silicon chips and their leadframe packages.
I for one would like to know the answer to this one, and know nothing about the material physics necessary to start figuring it out myself. Show 1 more comment. Active Oldest Votes. Improve this answer. Soham 8 8 silver badges 24 24 bronze badges. Nanotechnology may reach that stage at some point since they are already manipulating atomic levels, but not your rubber band. The dislocations created by the break cannot be manipulated like lego, i.
Melting and soldering is not the same as putting the ends together and expecting a fusion. A movie? Show 5 more comments.
If you pull hard enough to break such a structure one or a combination of two things will happen: The molecules slip out of their interlocked configuration, this leaves holes in both halves of the object where the molecules now belonging to the other half used to be, there is vacuum in these holes so they collapse almost instantly, all the lose threads of the broken ends fall towards the object and the majority of those surfaces where the two halfs were attracted end up attracting surfaces from the same half.
Add a comment. Some chemistry Let's assume that the rubber band is made out of natural rubber, which is a polymer of isoprene with some impurities in it. The crosslinked polymers look something like this, although note that the actual material wouldn't have as high of a sulfur density as depicted in this figure Some reactions Let's walk through your thought experiment.
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Oh no! OkCupid requires you enable Javascript in your browser. Pre-order Now. The song by the Trammps goes to speak on an unfortunate breakup between two people with the story being likened to various things including the topic of the elasticity of a rubber band as well as Dumbo clip with quote I've seen a peanut stand heard a rubber band Yarn is the best search for video clips by quote.
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