Comments by "EebstertheGreat" (@EebstertheGreat) on "Mark Rober" channel.

@QUBIQUBED All metamorphic rock forms that way, but you can still smash slate with a relatively small localized pressure.
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@MonkeyJedi99 There is massive revenue. Any cash or other valuables they seize that were involved in a crime are forfeited to the city or state, very often directly to the PD. So a $60 million crime ring can be very lucrative. That's why they spend so much time going after drug dealers.
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@engineernels1057 Heating a diamond at 1 atm actually converts it to graphite. Once the diamond has fully turned into graphite, you can continue heating it until it eventually sublimates.
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@engineernels1057 You have to heat it significantly hotter than that to boil diamond. But I guess it depends how quickly you heat it and how much there is. I imagine you could heat a diamond to like 3.5 kK and just wait for it all to evaporate and never get any graphite.
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It's similar physics to the wiffle ball. The other factor is the seam. You can swing bowl by pointing the seam in the direction you want the ball to swing. When air hits the ball head-on, it will curve around it, forming a boundary layer. On one side, this boundary layer is laminar, and it quickly reaches zero velocity and separates from the ball. On the other side, air hits the seam, which induces turbulence. This turbulent boundary layer loses velocity more gradually and separates from the ball later, because velocity is constantly replenished by other layers of turbulent air. Because of this asymmetry, the air is exerting different forces on either side of the ball, and in different directions. One way to look at it is to consider the wake. If air is separating from the ball close to the front on one side and close to the back on the other, the wake will be pointing in the direction of that first side. So by Newton's third law, the ball must be accelerated in the opposite direction, toward the seam. For rough vs. smooth, the same principle is in effect, but it is the roughness of the ball causing the turbulence instead of (or typically in addition to) the seam. Apparently more complicated things happen at high speeds though.
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@farazaghsani9381 Lasers are often used to cut diamond, but usually the diamond is water-cooled during the process. I worry that if you don't cool the diamond, the laser might just catch it on fire.
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It's too bad you couldn't get the egg to space, but 100,000 feet is still a heck of a long drop.
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For what it's worth, while this strategy will beat a naive strategy pretty handily, there are other strategies that work even better. Remember, the goal is not to guess who within the minimum number of guesses on average; it's to guess who before your opponent as frequently as possible. So your strategy at each step should depend on the opponent's current board. For instance, if you and your opponent have both narrowed the field to exactly 4 people each, then you should ask a question that applies to only one person, not split it in half. This strategy improves your odds from 50% to 56.25%. 538's Riddler column did a puzzle based on this, and people found that if you start with 24 characters per side, the optimal strategy begins with a question that splits the field into 8 and 16, not 12 and 12. With 14 characters per side, there were strategies tied for being optimal which split the field into 4 and 10 or 6 and 8. I suspect that for any N > 2, it is never the optimal strategy to split the field exactly in half.
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