Why scissors can never slice through the fundamental building blocks of matter
In short: Imagine attempting to divide a paper sheet into tiny fragments forever; at what stage would the scissors cease to function? The answer lies in a transition from chemistry to physics, where the forces holding matter together become too strong for any blade to overcome.
Paper is not a uniform solid but a complex, tangled felt of plant fibers composed primarily of cellulose. At the molecular level, these fibers consist of long polymer chains of glucose molecules linked by strong covalent bonds. However, the structure of paper is primarily held together by much weaker forces: hydrogen bonds, which form between neighboring chains due to uneven charge distribution, and van der Waals forces, which provide slight attraction at close contact.
When you use scissors, the blades do not act as perfect knives. Instead, they clamp the material and concentrate shear stress into a narrow region, creating a crack that follows the path of least resistance. Because hydrogen bonds and surface attractions are weaker than the covalent bonds within the cellulose chains, the scissors usually pull fibers apart rather than slicing through them. This is why paper edges appear fuzzy under magnification; the material is being frayed and pulled, not neatly severed.
While a blade may occasionally snap a covalent bond and turn one long molecule into two shorter ones, this only affects a small fraction of the material. As you continue to chop the paper into dust, the fragments remain solid clusters of many molecules. Eventually, a geometric limit is reached: because steel edges are thousands to millions of atoms wide, the paper will begin to smear or crush rather than shear as it approaches the scale of the blade.
The final boundary is defined by energy. While mechanical tools can unzip weak hydrogen bonds or occasionally break strong chemical bonds, they cannot focus enough energy to break nuclear bonds. These bonds, which hold the nucleus of an atom together, are millions of times stronger than the chemical bonds in cellulose. Instead of 'slicing', people employ nuclear fission or particle accelerators to destabilise nuclei, as these high-energy methods are required for atomic splitting.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: What Happens When You Keep Cutting Paper Forever?
To cite this card, link to https://intellectplus.co.uk/app/science-what-happens-when-you-keep-cutting-paper-forever.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Physics · More in Science · Latest · A–Z · All topics
