Why don't perpetual motion machines ever work? - Netta Schramm
View full lesson: http://ed.ted.com/lessons/why-don-t-perpetual-motion-machines-ever-work-netta-schramm Perpetual motion machines — devices that can do work indefinitely without any external...
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Around 1159 A.D.,a mathematician called Bhaskara the Learnedsketched a design for a wheel containing curved reservoirs of mercury.He reasoned that as the wheels spun,the mercury would flow to the bottom of each reservoir,leaving one side of the wheel perpetually heavier than the other.The imbalance would keep the wheel turning forever.Bhaskara's drawing was one of the earliest designsfor a perpetual motion machine,a device that can do work indefinitely without any external energy source.Imagine a windmill that produced the breeze it needed to keep rotating.Or a lightbulb whose glow provided its own electricity.These devices have captured many inventors' imaginationsbecause they could transform our relationship with energy.For example, if you could b...
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Around 1159 A.D.,a mathematician called Bhaskara the Learnedsketched a design for a wheel containing curved reservoirs of mercury.He reasoned that as the wheels spun,the mercury would flow to the bottom of each reservoir,leaving one side of the wheel perpetually heavier than the other.The imbalance would keep the wheel turning forever.Bhaskara's drawing was one of the earliest designsfor a perpetual motion machine,a device that can do work indefinitely without any external energy source.Imagine a windmill that produced the breeze it needed to keep rotating.Or a lightbulb whose glow provided its own electricity.These devices have captured many inventors' imaginationsbecause they could transform our relationship with energy.For example, if you could b...
