Comments by "Grak70" (@Grak70) on "" video.

  1.  @jamalalkaabi8  thinking probably the white hot fire shooting out of a kitchen pan when it got a little too hot.
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  2. When people ask “why should I care about quantum physics, isn’t it just propeller heads writing down equations?” I point them to semiconductors and the ortho-para hydrogen heating effect. :-)
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  3. I wish Scott Manley was the pre-eminent science communicator of our generation instead of Neil DeGrasse Tyson.
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  4. In a modern chemical plant, waste steam is fed into what’s called a “multiple effect” generator, where the low quality steam is used to preheat water or even lower quality steam to use up the temperature differential. So-called “triple effect” steam generation, where this trick is employed throughout the steam plant up to three times, are not uncommon in industry. Ultimately recovering this heat is limited by 1) the phase transition back to liquid and 2) the temperature differential you need to bridge, since more heat will flow if the counter-current streams have a large difference in temperature; at some point the capital and floor space won’t be worth getting that last bit of heat back.
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  5.  @jannikheidemann3805  you have a good point. Think about how NileRed wouldn’t have been able to pursue his passion without chill AF parents who trusted him.
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  6. Notice at 9:07 this is why getting liquid helium (other than its incredibly low boiling point) is such a pain in the ass. There are no materials with low enough boiling point to drop it below the inversion temperature in a pre cooler, except hydrogen. And working with hydrogen is its own pain in the ass.
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  7. It blows my mind that we literally would have never figured out the excess heating of liquid hydrogen without quantum mechanics. It’s the only explanation that works and it just happened to be discovered less than 50 years before having lots of liquid hydrogen kicking around was a problem we needed to understand.
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  8. Same. My t-shirt collection has suffered massive attrition over the years. If you don’t catch a splash in the first minute and get it under running water, goodbye.
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  9.  @RossReedstrom  I guess I’m old!
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  10.  @johnk7302 you are not going to discover 21st century transition metal catalysis in your garage hobby lab.
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