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Dennis Whyte

👤 Person
1833 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So those are the primary things.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And the reason for this is because helium has features as a nucleus, like the interior part of the atom, that is extremely stable.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And the reason for this is helium has two protons and two neutrons.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

These are the things that make up nuclei, that make up all of us.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

along with electrons, and because it has two pairs, it's extremely stable.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And for this reason, when you convert the hydrogen into helium, it just wants to stay helium, and it wants to release kinetic energy.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So stars are...

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Basically, conversion engines of hydrogen into helium.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And this also tells you why you love fusion.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

I mean, because our sun will last 10 billion years approximately.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

That's how long the fuel will last.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

It is one of the criteria for doing this.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

But it's the easiest one to understand.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Why is this?

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

It's because...

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Effectively, what this requires is that these hydrogen ions, which is really the bare nucleus, so they have a positive charge, everything has a positive charge of those ones, is that to get them to trigger this reaction, they must approach within...

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

distances which are like the size of the nucleus itself because the nature in fact what it's really using is something called the strong nuclear force there's four fundamental forces in the universe this is the strongest one but it has a strange property is that it while it's the strongest force by far it only has impact over distances which are the size of a nucleus so to get put that into what does that mean it's a millionth of a billionth of a meter

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Okay, incredibly small distances.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

But because the distances are small and the particles have charge, they want to push strongly apart.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Namely, they have repulsion that wants to push them apart.