Archived threads in /sci/ - Science & Math - 268. page
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Can someone explain how to do question 15? The PAT mark scheme doesnt include workimg for these bits.
>>7968363
I'm just taking a guess here. 36 km/h converts to 10 m/s. 160 Volts*100 Amps gives 16000 Watts which converts to 16000 Joules/s which converts to 16000 Newton meters/second. When dividing by 10 meters/second we are left with 1600 Newtons. A lot of the time physics problems can be easily solved with dimensional analysis. Just know your units, what they represent, and cancel out as many as you can and you're left with the correct answer. However, I have no idea how efficiency plays into this so if anyone else...
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>>7968381
>assuming 100% efficiency
>>7968363
How do you do 14?
looks grim af
How fucked would we be if the Sun supernova'd?
>>7968360
You better bust out the factor 50+
We would be dead.
/thread
Is this spider poisonous or dangerous? A friend of mine found it abd I was thinking about taking it and leave it free in my room to eat mosquitos
spiders don't eat mosquitos, they eat your children
Looks like a Dolomedes something to me, I don't think those eat mosquitoes, they're fishing spiders.
I might be wrong on the species though
>>7968316
Looks like a wolf spider to me.
Let's talk about transhumanism and space travel.
how soon will cyborgs be a reality? I hear DARPA is experimenting with neural prosthetics which could be the precursor to neural augmentations.
>>7968286
>transhumanism
>space travel
>cyborgs
>DARPA
When people think about this stuff seriously, it's an indication we are already living in a new age dark age.
World is going straight to hell and you along with it, forget these dreams son.
>>7968286
JC Denton confirmed
I'm waiting for the day where I don't have to spend hours online researching/watching stuff and I could just brain beam everything I want in seconds and go on about my day.
Ok, so seeing as Bristol raised their BSc Math requirements to A*A*A and Edinburgh raised theirs to A*AA. I think it's time for an updated discussion. Best unis for math in UK?
Mine: Oxbridge, Warwick, Imperial, Bristol, UCL (maybe Edinburgh, too).
Sheffied Hallam ofc
Durham
meet me there when you go too m8
underagefags FUCK OFF
Lines a and b are parallel. D is a point not on a or b. Using only a straightedge, construct the line through D parallel to a and b.
>>7968193
this is impossibly easy. Just set up your straight edge so that it doesn't intersect line a.
>>7968203
Duh? Parallel?
>>7968193
draw a line through point D. Put 2 tick marks on each line a,b and your new line. This signifies they are parallel
Can the x and ∙ symbols be used interchangeably?
Years ago I had a maths teacher who started writing some maths with the ∙, then changed it to a x, saying "oh, i forget that you haven't been taught to use ∙ yet"
Can I use the ∙ wherever I like, or is it strictly for the dot product?
>pic related
>not using parentheses
it's like you want your shit to be confusing
What kind of x's are those?
you should use * for multiplication as a habit, because ∙ and x will mean completely different things once you get to linear algebra.
But yes, if you're just doing calculations like the ones on your picture then it doesn't matter how you write it, ∙ x or *, it's the same thing.
![speeding_bullet[1].jpg](https://i.imgur.com/jK7DqbG.jpg "speeding_bullet[1].jpg")
Is it possible for a bullet to breach the mesosphere, make its way to the outerspace and after a while hit mars ? I'm guessing once it gets in the range of Mars gravity, it will exponentially speed up and gain lethal damage speeds again.
The average escape velocity of a bullet is 11km/h but there are snipers much with higher caliber that fires much faster than an average handgun.
you dont know how fucking thick the atmosphere is
If only there were multiple websites with delta-V values that aren't porn sites for NEETs where you could find that information.
>>7968098
Google tells me that the fastest bullet goes 1.2 km/s. The earth's escape velocity is 10 times that.
Why is gas(oline) a liquid?
I'm sorry. Everybody is busy defending pseudoscience.
it is a gas but the elite adds it to our water to poison us which is why it is a liquid
>>7967855
> small IQ brainlet can't contain his anger and has to madpost in other threads as well
poor kid
Can a person with an applied physics PhD really work in all areas of engineering?
In all areas, yes, but you wouldn't be as valued as others in some positions, vice versa for certain position.
Your specialty being spread on many fields gives you a disadvantage in a position the only needs a specific specialty compared to someone who studied the same amount as you but focused on that specific field, but of course that means he's close to useless compared to you in positions that don't need that specific specialty.
The department chair of EE at my uni is essentially an applied physicist. Dude is crazy smart
>>7967785
Mine too, but according to him that's because AP tend to choose the academy route more often than EE
![tumblr_nx1nsmVSwV1rin1sgo1_500[1].jpg](https://i.imgur.com/sVuaaAC.jpg "tumblr_nx1nsmVSwV1rin1sgo1_500[1].jpg")
How would you rate the education you got out of your Highschool?
I'd give my a decent 4/10 since for a long time the school couldn't find anyone to teach Algebra and had to hire substitutes that weren't qualified every time. All the other courses don't even matter since they were pretty easy and we just watched videos or do group readings of chapters most of the time.
7/10
the AP classes were usually quite a bit harder than their college equivalents. About 2 or 3 of my teachers were really great
2/10
School was being shut down pretty soon, all the long-term teachers were leaving and for the last year before my actual GCSEs I had substitutes in nearly all lessons.
Only passed through thorough online revision; I guess that was probably the only benefit of not having friends/a social life
I had a good chemistry teacher. Shame he was a vicious, sadistic paedophile who presided over a regime of casual violence and institutionalised abuse.
Discuss the genes that significantly affect intelligence. In this thread intelligence will be defines as the abilities required to be an ideal math student.
Also, Is it possible for the military has a secret reserve of geniuses or genetically engineered people to be used in a time of war?
If so, are the rest of us just leftovers?
>>7967639
>geniuses used in a time of war
Andy dumbass can pull a trigger
>debate something that scientists don't know shit about it yet
Gee, I wonder where is this going.
i have this image of the mods here being 12 year old japanese kids
Can someone give an ELI5 of an experiment of quantum entanglement which demonstrates that it's not simply: this box contains a red ball, this one contains a blue ball, when I open a box and get a blue ball I know instantly the other has red?
Like can we take a measurement which gives one particle a certain energy level and then observe that exact same energy level in the other particle?
Basically I'm looking for someone to prove beyond a doubt that we can witness spooky action at a distance.
>>7967489
go back to rebbit fag
Grrr... I don't like Reddit and you used a term that is used often on Reddit, therefore I won't help you.
is our brain deterministic?
Are all physical things deterministic ? Or do interdimensional souls that are not bound to the laws of universe manipulate our brains ?
Yes. We tend to generalize everything.
>>7967433
your mom's pussy is.
0^0=1
why?
>x/0=y
>why?
Will this thread get more than 100 replies?
>>7967427
it's notation. it works nice in bigger expressions
basically ^0 means you're taking an empty product which is by convention the identity
>>7967427
Because we defined it that way.
