A guide to the energy of the Earth - Joshua Why don't perpetual motion machines 2 days ago   04:44

View full lesson: http://ed.ted.com/lessons/a-guide-to-the-energy-of-the-earth-joshua-m-sneideman

Energy is neither created nor destroyed — and yet the global demand for it continues to increase. But where does energy come from, and where does it go? Joshua M. Sneideman examines the many ways in which energy cycles through our planet, from the sun to our food chain to electricity and beyond.

Lesson by Joshua M. Sneideman, animation by Marc Christoforidis.

Comments 213 Comments

heyim shen
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smoked bacon
Thank you Kanye very cool
donavan parrish
is nuclear energy more efficiant then others and is it the best energy available I think so cause solar, and wind cant match the production output of fossil fuels
Brad Turnow
Really well done video. I will be showing this to my 6th graders today as part of our unit on renewable and non-renewable energy sources. This video was great in explaining things very simply. Yes, I do wish nuclear energy and hydrogen fuel cells were mentioned. A possible video idea in the future would be to make a video on all the renewable and non-renewable energy sources and the pros and cons of each. Thank you again for a great educational piece. Kudos!
Cloud Ml
23Harley Gardner
need help please!!!! 😐😐😐
ansa tirmizi
oh this is a great educational veidio
Kathalina Franch Peralez Acosta (956KatPera)
Already know this. Kind of
John Skehill
what is this he has more subs than tfue
Jessica Marie
Saw this in class
Bhaiyalal yadav
Good make this video very nice
Broja Kishor Mandal
Were is nuclear enegry ? It is clean and efficient
In 2:10 i know why it is best to be a vegetarian
Reese Sanchez
be proud our science teacher has us watch this for class
Weston Acuff
4:05 is cool
Jigna Desai
Thank you for this awesome video!!
Grace Hong
We had to annotate notes on this video for homework, and I still have now idea what I'm writing
Dreadnaught 717
Creepy voice !!😑
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Why don't perpetual motion machines A guide to the energy of the Earth - Joshua 2 days ago   05:31

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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 energy source — have captured many inventors’ imaginations because they could totally transform our relationship with energy. There’s just one problem: they don’t work. Why not? Netta Schramm describes the pitfalls of perpetual motion machines.

Lesson by Netta Schramm, animation by TED-Ed.

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