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Everything posted by Genady
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Restaurant food (split from Heat Regulation - Obesity)
Genady replied to Michael McMahon's topic in The Lounge
Oh, such a pleasant read for somebody who cannot eat any dairy and who grew up in a greens eating culture. Thank you! -
You haven't met the requirement to be paid attention to. Thus, you are placed in the ignore list.
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Inside the flow, where there are no other sources of energy, the pressure where the fluid moves faster is lower than the pressure where it moves slower. How it relates to the pressure outside the flow, is another question.
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I think I made a mistake there by jumping to conclusion that it will reduce a pressure on the wall.
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Regardless of the wall being vertical or horizontal, if the fluid moves by external force, this movement does not reduce the pressure. Yes, perhaps you better go back and find where this idea of the reduced pressure came from.
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Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
The alphabet based writing, i.e., writing based on how words sound, appeared about 4000 years ago. Before that, writing did not represent how the words sound, but rather represented objects that the words refer to. The alphabet did not evolve from separating sounds, but rather from the previous symbols representing objects. For example, a letter for the sound "A" evolved from a symbol that represented an object for which the word started with the sound "A". History of the alphabet - Wikipedia -
No, there is not. The rotating paddle wheel will circulate the water but will not decrease the pressure.
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I think we can say any of that or something else, e.g., "the force is from the wall", - as long as we understand the mechanics of it.
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If "they" are so advanced then they are over an original excitement of discovery and exploration and perhaps just trying to dump their criminals away, like British used to send their convicts to Australia.
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We measure the downward pressure times the area and this is equal the weight, if the wall moves with a constant velocity. The brief moment of the reduced pressure will last while the wall accelerates from the resting state to a constant velocity. When the velocity is constant, the pressure will return to be equal the weight of the fluid divided by the area of the wall, i.e., not reduced.
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Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
These words might have a common origin since both English and Persian languages have a common ancestor, Proto-Indo-European language, aka PIE. However, I think that a connection is much more convoluted than the sounds being similar or "squishy and mushy". Look at the etymology of the English word: (worm | Etymology, origin and meaning of worm by etymonline) -
I think, they do in the first approximation. But generally, they are more complex because there are other internal forces in the fluids.
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Yes, at any point in spacetime where the two waves are present, the resulting field is the sum of two fields. Each one of the two waves continues unchanged. They do not "collide". Their effects simply add up.
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Yes, they just go through each other. No, they don't interact.
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Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
Maybe it is in principle impossible. -
Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
If it were possible, then police work would be very easy. Take a piece of a suspect's skin and listen to all their past conversations. -
Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
No. I don't think we do. Even if we could, we would recover a sum of all sounds that hit the object throughout history. That would be just noise. -
Language development in other Homos
Genady replied to Saber's topic in Evolution, Morphology and Exobiology
I don't think we know. -
Let's look at it this way. The piston moves down with a constant velocity. Thus, any volume of fluid above it moves down with the same constant velocity. Thus, total force on that unit =0. The force down is its weight. The force up is the pressure difference. Thus, this pressure difference is equal its weight. This is exactly what the "normal" pressure is. Thus, the pressure above the piston is the "normal" pressure.
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Yes, you're right. ds2 = dt2 - dx2. (c=1)
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They (in the link above) mention but do not emphasize that there is nothing "unique" in visiting mikva. It is a rather mundane and regular thing. E.g., women go there every time after having period.
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Yes, here: Event 1: the light hits a point on the Moon. Event 2: the bullet hits the same point on the Moon.
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I'll think about the suction, but regarding this: I suggest a mental experiment. What happens if there is vacuum above the piston? When it moves down, the pressure under it gets higher, but the pressure above remains zero. Thus, the overall pressure gets higher.
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Here is the diagram. Spatial coordinate is horizontal, temporal is vertical. The light, the ship, and the bullet leave the origin, i.e., the same point in space at the same time. The orange line is the light trajectory, the blue is the ship, and the red is the bullet. (No gravity.)