>>7737419 Sorry, i just noticed your pic is for a bird. Try this pic instead. Human tetrachromats' fourth cone most commonly has a peak between the two right-most peaks in this pic of human cone sensitivity.
Sup /sci/, need realitively simple crystals to grow, I've already tried the simple ones, but I'm looking for some more challenging ones I can do at home, I want to try out copper chloride, but no luck so far.
>>7737416 It's fun because chemistry, but it's still a pain in the ass.
I'd recommend using Epsom salts (MgS), copper sulfate, or if you want copper chloride, i mixed copper sulfate and some plain salt together in hot water, DO NOT stick anything metal in it, it corrodes stuff really well.
if you want actual crystals of CuCl, then filter out the precipitate of the CuSO and NaCl, and then add water to it, dissolve it all, and then slowly evaporate the water over a few hours, should work
So I decided to try to learn more rigorous mathematics, and read Apostol's Calculus and Higher Algebra by Barnard and Child.
Problem is that Higher Algebra is so fucking dry. It reads like the Elements. It's just 600 pages of definitions, propositions, and proofs. Apostol's book was way, way, easier to understand even though the subject is arguably more complex. Are you really supposed to and be expected to learn a subject like that? It's hard to explain, but there's no motivation for the propositions I guess. No stuff "in between" like... Comment too long. Click here to view the full text.
>>7737327 A rigorous book usually follows the Definition, Proposition, Theorem, Discussion structure, yeah.
Also what the fuck is this book you're reading? Why don't you use something more modern for elementary algebra like Khan academy or something? And elements? What the fuck are you doing bro? Please, take a look at a real mathematics curriculum and learn following the syllabi if you're really interested in doing math.
If you already did a chunk of apostol's calculus you're ready for... Comment too long. Click here to view the full text.
>>7737344 I guess it lacks the discussion part then.
>Why don't you use something more modern for elementary algebra like Khan academy or something? I was told rigour was important. Khan Academy hardly has a rigorous approach to algebra. I already know the subject, but not rigorously.
The elements I just read as a historic thing, not to learn Geometry.
The book itself might be the issue, but I'm having a bit of issue seeing what "counts" as rigour and... Comment too long. Click here to view the full text.
Is there any scientifically meaningful reason to focus on manned spaceflight besides "To see if we can do it"? I know that the long-term goal will be for the establishment of extraterrestrial colonies but that has more to do with a mixture of sentimentality and the long-term survival of the species. As far as expanding our scientific understanding in a purely practical sense, is there any reason to actually send humans into space?
>Guys! Guys! Instead of giving money to state employees, you know, the ones that got us to the moon? How about we give them to private corporations and billionaires who then can by old soviet rockets for cheap, pocket the profits.
Once the private companies get to space with state money and technology, they'll act like tough shits, and take over the moon, mars, and demand we pay more because "muh free market".
>>7737073 >Major theories about what causes temperatures to rise have been thrown into doubt >the findings did not dispute the effects of carbon dioxide on global warming Well that's blatantly contradictory. Journalists without a hard science major should really be barred from reporting on science topics.
>>7737100 >But, rather than being good news, NASA has concluded the lack of taking these factors into account means existing climate change models have underestimated at the future impact on global temperatures will be. You know I've never been as wrong as you are right now. Tell me, is it physically painful?
>>7737037 Don't really know what to say about Calc, but I can definitely give you some advice about tutoring O Chem. I tutor it actively and did for about two years before. Plus I TA an OChem lab. I'll give you advice wherever I can.
>>7737061 Yeah, anything helps. I basically came out on the top of the class for both parts of the sequence and out of nowhere the professor offers me the position for ochem; I haven't the slightest clue how to teach.
>>7736874 "As science began to rely more and more upon mathematics to produce its physical conclusions, mathematics began to rely more and more upon scientific results to justify its own procedures." --M. Kline
So, why is gravity weaker than the other forces? Could it be that the power of a force is inversely proportional to the range that it must act across? Of the three forces mentioned, in order of power they go gravity, electromagnetic, nuclear. In order of range they decay over, they go nuclear, electromagnetic, gravity.
So is it something like k/(Force of the force when two objects are touching)=(distance where force is half as much as when the two objects are touching)?
>>7738995 The only reason it seems like gravity has a longer range than electromagnetism is just that matter in general is composed of equal numbers of positive and negative charges, so large bodies have almost zero net charge*. Gravity, however, attracts everything, so large bodies build up a truly enormous gravitational "charge". This is why gravity dominates the universe, despite seeming so weak.
*the same goes for magnetism: Since every magnetic dipole has a North and South pole right next to one another,... Comment too long. Click here to view the full text.
Yeah I know, what you're talking about. Granted, I'm still a first year, so maybe all the normies haven't been sorted out just yet, but still. It is as if everyone just follows, what we are supposed to do and yes some of the others are way better at what we're currently doing than me, but it seems like as if they are not impressed by- and curious about what anyone at the institute does. I have been around talking to professors and they have showed me their research and I enjoy it and I understand most of it, but all the others are just like "nah,... Comment too long. Click here to view the full text.
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