Ragidandy
Ragidandy t1_j5qu4v3 wrote
Reply to comment by AlienTD5 in If I had two cups of water, one normal size and one as big as a swimming pool and stirred them both with proportionally sized spoons, would the larger pool of water keep spiraling longer than the smaller? by r3volc
It depends on the un-stated specifics of OP's question. But generally, the more volume the fluid in the cylinder has (ie: the larger the cylinder), the smaller the percentage of the fluid that is in contact with the edges of the cylinder. So a smaller volume would have a greater proportion of its fluid dragging against the edges slowing the liquid.
Ragidandy t1_j5podj7 wrote
Reply to comment by AlienTD5 in If I had two cups of water, one normal size and one as big as a swimming pool and stirred them both with proportionally sized spoons, would the larger pool of water keep spiraling longer than the smaller? by r3volc
It isn't harder to say. The surface area of a cylinder goes up much slower than the volume as the cylinder gets bigger. The larger volume's energy would dissipate slower.
Ragidandy t1_iuej4j2 wrote
Reply to comment by Busterwasmycat in Is there such a thing as a gamma radiation mirror? by AlarmingAffect0
But aren't you making the same assumption that the OP citation proved wrong? All the same arguments were made for diffraction, and now we see diffraction is possible. That doesn't mean reflection is possible, but it does negate or weaken this argument that it's impossible. Actually, if diffraction is possible, then a specific sequence of diffractors should be able to reflect, right?
Ragidandy t1_j6ggqdl wrote
Reply to comment by Remy4409 in Best way to flatten concrete walls outside of my house? by Remy4409
Yeah man, learning that way is the best. Just make sure you wear a mask. Grinding concrete sucks, but breathing it is worse.