Comments by "David Elliott" (@davidelliott5843) on "Veritasium" channel.

  1. A friend of mine made TNT when he was just 12 years old. “Oh it’s just toluene and nitric acid”. Did it work? “I accidentally blew up our neighbour’s garden retaining wall”. So tell me again why these things are controlled substances?
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  2. The Veritasium channel has a new video about thermite. It’s extremely stable in storage, but when started the reaction can go over 2000 degrees centigrade. Drop a magnetic can on a tank roof and that mixture will burn through.
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  3. The swaying bridge causes people to walk in step. It's imperceptible at first, but soon enough you can't avoid keeping in step.
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  4. Small dark objects against a dark sky. Its no surprise we can't see them.
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  5. A lot has been hidden about US first nukes.  The bomb dropped on Hiroshima was a different technology to Trinity and Nagasaki. The Hiroshima bomb used uranium and was the most likely to fizzle (fail to explode properly) yet was never tested. Why would you drop your ultimate secret weapon over the enemy unless you know it's been tested? So who did test the "Little Boy" bomb design? The Trinity and Nagasaki "Fat Man" worked by compressing ball of plutonium. British engineers were deeply involved with perfecting the shaped charge explosives. But fusing was a huge problem until a German Infra Red fuse was used. Why would Germany feel the need to design fuse that uses a flash of light to trigger a bunch of explosives to fire at the same nano second. In late 1944, Oppenheimer said they would not have a test bomb before the end of 1945, yet three months after Germany collapsed they had taken out one Japanese city with an untested bomb and exploded two of their own design along with another Japanese city.
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  6. I was told that everything moves along the path of slowest time. With enough gravity, time will stop. That’s a black hole.
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  7. Boat sails are aerofoils. They use lift to provide the forward power. The pitch on this propeller is doing the same as a sail going across the wind - the blades push the boat (car) faster than the wind.
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  8. We discussed the spaceman at the event horizon seeming to stop. He feels himself just walking in but anyone outside sees him in suspended animation. He slows so much that given the age of the universe, he can’t actually cross the line.
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  9. Dark Matter is a workaround because our current theories just don't work.
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  10. Cast iron is notoriously difficult to repair. Could this be used to repair damaged engine castings?
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  11. Iodine tablets protect the thyroid gland by saturation. When its full of the element there is nowhere for iodine 131 (the radioactive version) to attach. It does nothing for Caesium 137 which affect the bones. Strontium 90 is another nasty but its doesn't travel so far from the explosion.
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  12. Airline flight staff have no higher cancer risk that anyone else yet they are exposed to considerably more radiation. Ditto people who live at high altitudes. The people of Ramsar in Iran have a background radiation dose at 260 mSv year. The legal limit for radiation workers is 20 mSv year. It's believed Ramsar people have fewer cancers but the numbers are too low for a full epidemiological tests. are
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  13.  @sy1ve0n  Yet New Brunswick in Canada will be hosting the first commercial molten salt power reactor. The Moltex Waste burner is intrinsically safe and will be fuelled with high level nuclear waste from a nearby CANDU plant. Waste with a half life of 30,000 years will be reduced to 30 years. In the process it will deliver 20 times more energy than the old reactor was able to extract.
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  14.  @Aereto Light is supposed to be a wave and a particle. But the latter is purely a mathematical construct. Photons are illusory.
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  15. I’d go for 73.
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