The Questions not worth their own thread thread VII

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Also, would it be bad for financial institutions if people knew personal finance well?

That would probably be bad for fund managers. No one who knows personal finance well is likely to put money in a mutual fund, for example. But other that those people who make a living managing the money of others, it would probably be fairly good for the industry as a whole because there would be fewer mistakes, fewer defaults, fewer bankruptcies.
 
What's the difference between d/dx and d/dt?

First, if you don't mind, I'd like to ask you a question, though please, feel free to disregard it if you don't want to answer, though I mean this with no offense: Don't you have a university degree in a technical field? I thought so but maybe I've been mistaken...it seemed to me some of your recent posts are just meant to draw out lame math/science jokes but maybe I was under the wrong impression the whole time.

Anyway, the first and best answer is that there is no difference - both are simply potential symbolic notation for various concepts. The next thing, though, is that in practice it is very common for x, or unit vector x, and so on with y and z, to refer to orthogonal spatial dimensions in mathematical functions. t, similarly, almost always refers to time. So most commonly d/dx refers to a derivative in terms of one of the three Cartesian orthogonal vectors (as opposed to a cylindrical, spherical, or other system) while d/dt refers to a derivative in time.

Or, d/dt is just more useful to specify the rate of change in use of a certain insecticide.
 
First, if you don't mind, I'd like to ask you a question, though please, feel free to disregard it if you don't want to answer, though I mean this with no offense: Don't you have a university degree in a technical field? I thought so but maybe I've been mistaken...it seemed to me some of your recent posts are just meant to draw out lame math/science jokes but maybe I was under the wrong impression the whole time.

Are you kidding? I'm just starting university. I just read a lot and am curious about a lot of topics. Doesn't mean I know everything. :lol:
 
Are you kidding? I'm just starting university. I just read a lot and am curious about a lot of topics. Doesn't mean I know everything.

Well, take it as a compliment then, as I must have thought that based off the fact that unlike many others I've never seen you try to make arguments with data clearly orders of magnitude wrong, try to contradict the definition of an average, etc...

Though unfortunately that does mean Perfection and others apparently remain the experts compared to both of us :p
 
Mulling over your answer, I guess the d/dt operator will tend to make e^x become 0 with enough differentiation, while d/dx won't. I understand it now, I think, since the former is a derivative not in terms of x, but of a different variable.

Anyway, that's done...
Well, take it as a compliment then, as I must have thought that based off the fact that unlike many others I've never seen you try to make arguments with data clearly orders of magnitude wrong, try to contradict the definition of an average, etc...
Thanks. :)

Though unfortunately that does mean Perfection and others apparently remain the experts compared to both of us :p
And we have to learn from them.
 
Mulling over your answer, I guess the d/dt operator will tend to make e^x become 0 with enough differentiation, while d/dx won't. I understand it now, I think, since the former is a derivative not in terms of x, but of a different variable.

d/dt would make e^x become 0 immediately, because it does not contain a variable in terms of time, ie. some hypothetical function that was f(x, t) = e^x + g(t) => f '(x,t) = g'(t).

And actually, since this seems to be exactly what you are looking for, I'd recommend looking up wave motion. Again, I don't entirely know your level but an introductory physics text (ie. without needing extensive math backgrounds) at the least covers basics, strings, light, etc...- essentially, the defining wave equation is a differential equation with terms both in time and space.

Or, as you would see, wave motion can be described in terms of sinusoidal functions - eg. cos(kx-wt). So there is a clear distinction between derivatives/period/etc... in space, and the same in time.
 
Oh, shoot, I don't recall what comes after jerk...hmm, upon looking, seems like maybe jounce?
 
Why is it that I keep injuring the same ankle (the right one) again and again? Why never my left one?

For example, sprains, strains, rolling it, bruising it, etc etc.
 
Why is it that I keep injuring the same ankle (the right one) again and again? Why never my left one?

For example, sprains, strains, rolling it, bruising it, etc etc.

a) it's weaker because of previous injuries,
b) you have habits that put it more at risk,
c) All of the above.
 
Can someone give me some ideas for some good Danish movies? That are in Danish, not just taking place in Denmark or made by Danes.

2nd question: When I see an action movie in a language other than English, it usually seems amazingly stupid to me, far dumber than if it were in English. Does anyone else feel the same way? (Exception: French. I don't know, but French actually seems to work.)
 
It's been some years since I've watched it, but I remember enjoying I Kina spiser de hunde (In China They Eat Dogs) a lot.
 
Can someone give me some ideas for some good Danish movies? That are in Danish, not just taking place in Denmark or made by Danes.

2nd question: When I see an action movie in a language other than English, it usually seems amazingly stupid to me, far dumber than if it were in English. Does anyone else feel the same way? (Exception: French. I don't know, but French actually seems to work.)

Why do you want to see a Danish film, of all nations to pick from?

As regards to your second question, a lot of English-language action films seem amazingly stupid to me, and I am English.
 
Can someone give me some ideas for some good Danish movies? That are in Danish, not just taking place in Denmark or made by Danes.

Babette's Feast is pretty good, if you don't mind something that's kind of minimalist (or produced on a low budget; I haven't decided yet), and if you have patience enough to get through a bit of the tedium.
 
If you have two functions, f and g, and f(g(x)) = x and g(f(x)) = x, then the two functions are inverses.

But what if f(g(x)) and g(f(x)) = -x

What if they equal xi ?
 
On dress - Americans and other foreigners need not answer:

1. When wearing a suit, should I button the jacket? I'm used to wearing it open (I've only worn a suit in civillian context twice) and I have fairly broad shoulders, does that make a difference?

2. If you have a tie, but no jacket, and a long-sleeved shirt, do you roll the sleeves?
 
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