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New ActivityThe latest activity to be updated on this site is called "Conversion Graphs" (Practise reading a wide range of conversion graphs to convert one unit to another.). So far this activity has been accessed 190 times and 40 people have earned a Transum Trophy for completing it. 
A conversion graph is a machine for answering "how much is that in…?" without doing any arithmetic. Somebody has already done the calculation for every possible value and drawn the result as a line, all you have to do is know how to read it. That is genuinely useful the moment you leave the country and a road sign says 32 km, or you follow an American recipe that wants the oven at 350 °F, or you want to know whether $60 for a pair of trainers is a bargain. The graph does the work; you just need to be able to get an answer out of it.
Featured ActivitySnooker Investigation Given the width and height of a snooker table can you predict which pocket the ball will end up in and how many times will it bounce off one of the sides? Recent News:Harvard scientists turn knitting into shape-shifting smart fabricHarvard researchers have transformed ordinary knitting into a platform for creating fabrics that can snap between different shapes and perform useful functions. Using elastic yarns and industrial knitting techniques, the team engineered thick textiles that naturally curve and lock into multiple stable configurations, much like a light switch flipping between on and off. By adding conductive yarn, they turned these shape-shifting fabrics into soft electronic switches capable of controlling lights, counting steps, and responding to movement. more... This strange “spacetime crystal” can suddenly become a black holePhysicists have mathematically captured a bizarre “spacetime crystal” that can either dissolve or collapse into a microscopic black hole after only a tiny change in energy. Their breakthrough came from an unusual trick involving infinitely many dimensions, potentially giving researchers a new tool for studying primordial and microscopic black holes. more... Tiny graphene wrinkles create surprisingly powerful electrical effectsScientists have discovered that tiny, sharply curved wrinkles in graphene can dramatically alter its electrical behavior, creating surprisingly strong charge separation. The finding suggests future electronics could be tuned by reshaping materials at the atomic scale instead of changing what they’re made of. more... Claude Fable 5 AI finds a tiny formula that topples an 87-year-old math conjectureA mathematician working at Anthropic says he used the AI model Claude Fable 5 to uncover a remarkably simple counterexample to the Jacobian conjecture, a famous problem that has resisted mathematicians for more than a century. The result shows that the conjecture is false in three dimensions and above, although the original two-dimensional version remains unsolved. more... Mathematicians prove perfectly fair elections are impossibleMathematicians have shown that no electoral system can perfectly balance local representation, proportional national results, and a fixed-size parliament once enough parties compete. A newly proposed voting method could soften these unavoidable trade-offs and produce outcomes that are much closer to fair. more... New cancer strategy could stop tumors before resistance takes holdResearchers are applying evolutionary theory to cancer by changing treatments before tumors have time to develop resistance. Mathematical models suggest that rapid, carefully timed switches between multiple therapies could improve cure rates. more... “Silly sprinklers” help scientists finally solve Feynman’s famous sprinkler mysteryA team of mathematicians used whimsical "silly sprinklers" to solve a physics mystery that has puzzled scientists for decades. Their experiments showed that the rotation of both normal and reverse sprinklers is driven by the momentum of flowing water, not by the outside water flow or other long-standing theories. The results finally provide a clear answer to Feynman’s famous sprinkler problem. They could also help engineers design more efficient fluid-powered machines. more... |
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