Archived threads in /sci/ - Science & Math - 227. page
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Live Dragon module docking with the ISS:
http://www.nasa.gov/multimedia/nasatv/#public
Cargo includes an inflatable Male Gigolo
>zzzzzzz
SpaceX mission control in Hawthrone looks amateurish compared with NASA's.
They have these cheap looking chairs and fold-out tables
T-minus?
If you roll a pair of dice, what are the odds that a second pair rolled would match the numbers on the first pair?
>1/6
>>7993947
For one die, yes
But what about two? In the picture posted both dice need to match the original pair. A friend is arguing that it's 1/3x1/6 because the first die can match either of the two original dice, but that doesn't seem right to me. I'm really shit at math so I thought I'd ask people that actually like it
>>7993943
Well it depends on how your question is interpreted, I think what you're saying is if you have four dice and role them in pairs. I'm which case I'd say that it was 1/36, you don't really care about what the first set dice come up, but just that the second pair role the same.
Hey, have you heard of 'Air Bonsai?'
I think it is bullshit, another crowd-funded scam. That is, unless I am missing something here. Let me list my concerns with the setup.
>Video shaky, handheld camera except for floating parts
>No description of mechanics besides 'magnets'
>No third-party video or reviews
>Earnshawtheorem.jpeg
>No shipments made yet
>No mist...
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>>7992851
it looks like theyve just put putty/flocking on a magnet to make the underside look organic and put a tree on top of it. same as every other gimmicky floating display piece toy on the market
>>7992851
>3,784 backers pledged $843,743 to help bring this project to life.
What gets me is the distance. I've fooled around with making magnetic bearings. It is doable, but damn the magnets you need to do it are powerful and the distance is rather close. But, i was using N52 magnets, not normal magnets with larger fields. You just use permanent magnets, not electromagnets. Their thing is the same. Magnets in base and floating thing. The electric only rotates the base's magnets...
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>>7992851
lol no. You don't need superconductors to levitate stuff. Earnshaw's theorem does not say magnetic levitation is not possible, just that it is unstable. Provided one has a means to know where the magnet is and a means to adjust the applied magnetic forces one can stabilize a magnet such that levitation is possible.
There are devices on the market that do exactly this:
http://www.amazon.com/Fascinations-REV2P-Levitron-Revolution-Platform/dp/B003BWSW0E
>>What would it power?
electromagnets and a system that adjust them.
>>Is this another solar roadway? Another underwater lung?
no, but it's a silly idea and it looks like something out of skymall
Why are GPAs used.
>inb4 I have a shitty GPA
But I know someone who is pretty damn good at what he does
>he's old as fuck (35)
>in engineering
>haunted by GPA he had as an 18 year old
Shouldn't we measure someone's most current aptitude at a subject
i.e. Measuring their latest attempt at a course?
Most of this shit is rote memorization that you'll forget and will probably never use again anyway
Why...
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>>7991886
haha u are low iq brainlet XD
>>7991886
Most companies don't care what your GPA was after 10+ years in industry.
>>7991916
Some industries, it's literally a non-issue after your first job.
>>7991886
GPA is useful for Grad school admittance. It is also useful in assessing a potentional hire, but IMO work experience and technical prowess (upon examination by the hiring powers) *may* be a more useful factor. So your buddy is fine, as while his GPA sucks, he does the job very well and knows his shit.
>sit in on a signal processing course
>professor says Dirac Delta "function"
>>7989699
>I don't know what a functional is
Stop trying to seem smart.
>>7989704
It's a distribution, not a function.
>>7989706
Formally it is well defined as a measure. And a measure is a function.
Why isn't the Pythagorean theorem written as
A x |A| + B x |B| = C x |C|
Wouldn't it also make sense for irrational numbers if it were?
what is a negative length
>>7990112
>what is a negative number?
See, I don't get why we have negative numbers but negative lengths are apparently absurd. Draw me -4 sheep if you disagree. Not OP btw.
>>7990118
you don't get why we have... negative numbers?
I got a supposedly "<1mw" green laser pointer (same as pic attached) that gets brighter after 20 seconds.
At full brightness it will melt a hole through thin plastic and if pointed at a metal temperature contact probe it will register ~50°c in a few seconds. It will not burn paper or light a match. At full beam it is too hot to point at the skin for more than 2 seconds.
Is this typical for a 1mw laser pointer?
Thanks
>>7989163
Idk but how do I get one and how much does it cost?
>>7989176
Fleabay.
Protip. Don't aim the beam at a camera. Fucked my tablet up. Glad it's a work tab.
>>7989176
Like 4$ delivered
>ITT: We talk about renewable energy ideas
I have been thinking there must be a way to create electricity out of acoustic waves, I am currently working on the circuit intended to create said electricity.
>>7986494
>itt morons discuss magnets
>>7986494
Solar panels. Im getting a PhD on Energy flows. (my major is mechanical engineer)
>>7986494
I don't see why geothermal isn't more popular. Drill hole into magma, boil water with it, spin turbine, how hard is this?
Explain this freak of nature, /sci/.
How can something like this exist for even a nanosecond
Resonance stabilized, senpai
>>7993123
You take inorganic chemistry to explain the stability of these molecules OP.
>>7993133
Is that a thing?
How does it allow a halogen to have four covalent bonds?
How old is too old to go back to university? Has anyone gone back to pursue something they were more interested in? Is it a waste of time to get a second bachelor's?
I'm 27 and went back for an MSc in MechE. I have a BS/MS in Math, but Engineering is where I truly want to be.
It's different, admittedly. My mind has to get used to the problem solving and being in the lab.
>>7992757
University is the biggest scam after marriage. Don't waste your time and money. Get a part time job and learn whatever you want for free from the internet.
>>7992786
Oh, good thing that gets you into interviews!
Wait... it doesn't?
Please read to the end as it is serious.
I have found(/understood) how 'science' and 'everything' in the universe really work, I am able to provide all the proof to it as well as demonstrate.
But the problem is that by doing so, it will be a huge slap to the face to many scientists, beliefs and researches invested in so far, and also a huge blow to all the profiting in existence atm...
So basically most of the 'fame'(in science), 'in charge' and 'rich' people in the world will probably be against it and would probably...
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>>7992408
Give to us first obviously, we'll tell you if its good
>>7992410
I don't really think it's a good idea
>discover the ultimate truth of the universe
>go on 4chan and brag immediately
yeah no
I've been thinking about how we could travel to outer space and become friends with ayylmaos. I've come up with several ideas/theories to how we can make earth or any space object travel in infinity until we hit something like a planet or something else.
I'm not a genious when it comes to this but heres all of my ideas:
1. All big corperations go together and build a massive engine on earth. Now you might ask, what would fuel such a massive engine? Simple I say, we just suck out energy from the sun and somehow make the engine work and we can now...
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>>7991971
cont.
3. We send a massive square-shaped rocket out to space with millions of people. This rocket is ofcourse self-sustained and produce it's own resources and therefore can travel in unlimited amounts of time. This rocket will ofcourse lose speed and fuel as it travels in space, but there is a solution. We take help of gravity and receive some help from other planets orbits. The square rocket will work as a pebble in a slingshot and we will therefore be slunged away from planet to planet for a very long...
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is this a copypasta?
How long did you take writing this bait? Holy fuck.
It's pretty good tho
groups of people (5 or so) in cryosleep are shot into space with life support for hundreds of years, computers navigating/powering the ship with solar energy, the people wake up on whatever planet they crash into to start working on it and... y'know, do shit and also fuk
we do this 10 times a year for 1000 years, randomly shooting people into space in every direction
or just mars but thats not as fun
Name me one thing that isn't a 'social construct'.
>>7991784
race
>>7991784
The universe
Note: this does not mean our concept of the universe but rather the universe itself
maths
![1412364834384[2].png](https://i.imgur.com/VJGVKHr.png "1412364834384[2].png")
Did the big bang make a sound?
>>7991448
In vacuum?
>>7991458
The Big Bang was literally the opposite of a vacuum.
>>7991448
i dont know a lot about it sorry
What is the single most important concept in physics ?
gauge theory
>>7991280
Maxwell's equations.
>>7991280
There's a lot of "gravity" surrounding the theory of gravity.
HYUK HYUK HYUK ^_^
