nog642

nog642 t1_j6fasp0 wrote

Yes. That's how net worth works. But it's not that useful. It doesn't fit our notion of a millionaire having a million dollars. When you think of a millionaire you think of having 1 million liquid. I think many people also have a similar mental image of a billionaire, which is a misunderstanding and misconception most of the time.

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nog642 t1_j6f7w51 wrote

Depends if you own a house or something and that's included in net worth. I don't think owning a 1.4 million dollar house makes you a millionaire, considering you live in it and so don't have the money. I mean you have the option to sell it and move somewhere cheap and be a millionaire I guess, but until you do, you are not a millionaire. Net worth is not a good measure of these things.

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nog642 t1_j4unp9g wrote

Sound energy either stays in the medium (the boundary with space basically reflecting the sound back), or becomes kinetic energy of the molecules of the medium that are flung into space (and are just moving at a constant speed, not vibrating, so it can't really be called sound anymore). You'd get the former if the medium is a solid, the latter if the medium is air that is escaping into space.

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nog642 t1_j46jz9m wrote

Not sure about this specific case, but in general for this sort of thing (more difference between groups than within them):

Think of like a venn diagram with a large overlap. The difference between the groups is the distance between the two centers of the circles. The difference within the groups is the diameter of the circles. You can see how the former can be smaller than the latter, easily.

More accurately (and more mathy), think of two bell curves. The difference between the groups is the distance between the center of the two bell curves. The difference within the groups is proportional to the standard deviation or variance (4 standard deviations or whatever). Again you an imagine how by just putting the bell curves close together, they can remain clearly distinct while also having more difference within them than between the averages.

For an example more related to this, if you pick a trait like height for example. The difference in average height between people in your town vs the next town over (pretend you live in a town if you don't) is probably smaller than the difference in height between you and your sibling (pretend you have a same-sex sibling), despite the fact you are more closely related to your sibling.

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