Archived threads in /sci/ - Science & Math - 426. page

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>>8968593

Vaguely related: I recently built an Excel sheet which tests knowledge of the entire table, primarily names, symbols (abbreviations) and types/group names (alkali metals, transition metals etc).

The first sheet (pic related) is where data is entered/populated. The third sheet, which is locked/protected, is the master answer key. The second sheet is a conditional format which shows at-a-glance how you did. If corresponding cells in sheets 1&3 have equal values, then the corresponding cell in sheet 2 is Y/green, else N/puke red.

Overall I got something like 95% when I played my own quiz. I think I'll apply this quiz format to other things I want to study/memorize.

>>8968627
That's quite a good idea, anon

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>>8968593
why not make a game about the final frontier: chemical space. Chemical space is the space of compounds that are possible.

https://www.chemistryworld.com/opinion/chemical-space-is-big-really-big/7899.article
https://en.wikipedia.org/wiki/Chemical_space

Chemical space is so big that if we were able to synthesize every compound with a molecular weight up 500 in 10 mg vials, that we would need more matter in the visible universe.

You could like legitly make a game where you put together molecules using the construction system that was used to make any of the GDB virtual chemical databases.

economics is the biggest meme. federal reserve has 700 economists working for them and they have nfi what they are doing.

as jim grant says here 'they either need 701 or none'

https://m.youtube.com/watch?v=KAWxhdPGJfU

>>8968598
According to some balding Lebanese author who pretends that "you can't predict nuffin" is a deep statement, economist are used to rationalize decisions to an audience, rather than advise decision makers

>>8968475
>ould I theoretically see inside my house in the past by just traveling lightyears away and capturing the light with a huge telescope?

disregarding trivialities, such as the complete lack of understanding, as to how to even begin conceptualizing a working Alcubierre drive, and the impossible size of the telescope required to let you look into a window on earth from 100 light years away, yes, it's all totally possible

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Instead of wasting this nonsense in one-of posts yo /sci/, you should make them into Troll Physics images and post them on /n/, so your wit can be immortal.

Republicans have all this under control.
The plan is to have Jeff Sessions and
Ted Cruz's dad stand at the shoreline
with bibles in hand. As the sky
darkens and the water rises they will
raise their left hand holding the bible
and command the Seas to settle, and if
that fails, plan B is to run like hell
and to blame Obama.

>>8968332
Actually I just calculated the minimum theoretical cost of pumping the world oceans 1m lower, by pumping the water up to a 500m height, and at 55$/MWh and 100% pumping efficiency it costs a mere $27 trillion.

That does sound like a lot but it's really not that much, the biggest problem is finding where the hell to put all this water. Maybe Australia or Africa could keep it trapped for long enough.

>>8968327
http://science.sciencemag.org/content/337/6095/704

The argument makes no sense since AGW is not over thousands of years. Saying so-and-so caused the MPT tells you literally nothing about what factors are strong in current warming over a hundred years.

>>8968347
For AGW yes, but one would hypothetise that it's relevant for GW in general and may heavily affect it now, during the existence of human civilisation.

>>8968198
>What is this called?
brain

>>8968199
thanks /sci/

>>8968165
looks like a dead tooth, nothing will happen to you because it probably came out a long time ago judging by the look of it, and it stood loosely there. And the hole where the tooth was positioned probably healed over time so it didn't bleed so much. Probably should go to your dentist just to check up

>>8968265
I'm gonna hit dentist
Just wanted to get a little insight
Thanks there

>>8968165
Are you british?

>>8968086
Learn about interior point methods instead.
They are easier to understand (basically just Newton's method), faster in practice and can be generalized to work for nonlinear problems too.

>>8968096
I am already somewhat familiar with this, but this is for an assigment. So there is no way around it. But this is the reason I want the "quick" way.

I use pencils. B or 2B.

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t. fedoramaster

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>>8968067
>Using the inferior Zebra gel ink pen
Zebra Sarasa Clip in 0.3mm and in blue black color is the patrician's choice.

>>8968024
just convention of doing mathematics with them

>>8968024
clockwise and anticlockwise

>>8968024
>Is there any actual reason why we use the conventions "positive" and "negative" to describe charges?

Yes -- because their behavior is perfectly described in terms of multiplication of positive and negative numbers.

For example, here's the electrostatic force equation:

F = (k * q1 * q2) / (r^2)

In that equation, two charged bodies are represented as q1 and q2. If they both have the same sign, then the resulting force F is positive. If they have different signs, then the resulting force F is negative.

That result agrees perfectly with the fact that opposite charges attract (represented by negative F), and like charges repel (represented by positive F).

>>8967975
Sitting on your ass and hoping for the best.

>>8967975
IUTeich obviously

>>8968181
upvoted

>>8967911
>magic

1: infinite
2: infinite
3: infinite

Why? Because, "magic".

>>8967911
I think the answer to 1 is 78.

Seems you should have had more selections at 30+
Another run late? And perhaps also in /g/?

2N - N is undefined

>>8967845
>1+(2-2)+(3-3)+....=2N-N
Where are you getting this line from?

>>8967845
do you even -1/12 bruh