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Neil deGrasse Tyson

๐Ÿ‘ค Speaker
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18857 total appearances
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Appearances Over Time

Podcast Appearances

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Turn off your flashlight.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Yeah, but I like the Muhammad Ali.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Give me the Muhammad Ali comment.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

That's a really good one.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

But I think that was a wig he was wearing.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Oh, no.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

I was so distraught upon learning this.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Really?

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

So I didn't know he came up with that, but it is a well-known means of calculating the rate of temperature change in physics class.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Okay.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Yeah.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

So the way you do it is you have two materials at different temperatures.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

All right.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Okay?

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

And you bring them in contact in some way, either physically, so that atoms are touching each other, or have air molecules bouncing back and forth, or they're radiatively connected.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Connect them in some way.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Okay.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Okay?

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

And then you measure the rate at which the temperature changes so that they reach equilibrium to each other.

StarTalk Radio
Cosmic Queries โ€“ Total Darkness

Cool.