what the fuck does this even mean
so did I get rid of my gingivitis through proper flossing or switching to an electric toothbrush (a crutch, but fuck brushing the "correct" way with a manual one)
I actually do get like a couple teeth every night that I was able to remove food clumps stuck in between the gums with flossing which would otherwise have contributed to gingivitis
they want you to use the more expensive interdentbrushes that hurt your gums
it definitely helps
it removes plaque from the teeth
replace floss with a very thin piece of hard clear plastic and move it between your teeth after not flossing for a week
you will find plaque smeared all across the plastic
if you were able to travel back in time millions of years, could you breathe the air from the dinosaurs and the cambrian (or wathever) time?
how would it have smell back then?
I cant answer that question but i can tell you that in some point of earth history there was a lot more oxigen in the air and it allowed to insects to get giant sizes like centipies 3 or 4 meters large. Dunno if that air could have been noxious for us. Hope someone anon tell us.
>Recent findings indicating the possible discovery of a previously unknown subatomic particle may be evidence of a fifth fundamental force of nature
>If confirmed by further experiments, this discovery of a possible fifth force would completely change our understanding of the universe, with consequences for the unification of forces and dark matter.
>that kid who always put edgy shit on his exam.
Professors must be cringe proof
>"solve problem," I know it is wrong
>write down on a midterm
>I know this answer is wrong : (
get exam back, grader wrote
>You were close : )
I almost always draw or write something on my exams. It's probably boring looking at exam after exam with the same shit on it, so I try to be just a little tongue-in-cheek with them. Usually a snide comment, something sarcastic, or a little doodle that's applicable to the subject material.
Sometimes, it's actually a question about what's being asked, though.
>"What, for X? Because it's ANSWER."
>"Yes, for X. +5."
My friend really likes rocks, I say friend cuz our dating is... Complicated...
Anyway I got some really cool rocks for her and I'm thinking about giving them to her on her birthday, I know that seems lame to most people and maybe to all but I would like a geologist oppinion.. I can upload pics...
Is the current way we teach mathematics broken? How come we don't teach mathematics through a formal language such as Lambda Calculus or a programming language based on Lambda Calculus? Why do I need to know how to solve a differential equation by hand when I can write a program to do it for me? Every professor I have had can't even use summation notation correctly, I wouldn't mind having a compiler around to tell the professor that they are full of shit.
I really enjoyed this series.
It was so informative on so many subjects.
While still being very interesting and entertaining.
I am really interested in astronomy and history.
Sure some of you might see this as pleb docimentary. But i really liked it.
Anyone who can recommend anything similar?
Sadly, there is a significant shortage in scientific documentaries about space and astronomy. Cosmos is okay but I think people around here don't like it so much because it's appealing to a very wide audience including the children, which means it's quite a dumbed down documentary.
You should definitely see The Ascent of Man by Jacob Bronowsky and Connections by... another guy
I also love The Story of Maths
How do I into Goodwill Hunting mode?
If you had a kid, what subject would you want him/her to pursue and why?
What fictional depiction of aliens is the most realistic from a scientific point of view? If you were in charge of creating them, how would they look like? If aliens exist, do they look more like those species from Star Wars, Xenomorph, worm-or-insect-like creatures, greys or are they humanoid?
Depends entirely on the terrain, gravity, planet composition and atmosphere they evolved in. The one thing we would expect to see is that they are carbon-based and have DNAs.
Other than that, they can have extraordinary anatomies. Definitely not the no-imagination-human-knockoff humanoid type aliens that hollywood comes up with in every movie.
I tend to ignore fringe theories like this, but this video has me a bit baffled. the evidence was rigorously tested. Am I insane?
PS watch the full video before shit talking it. I went in very critical and now I'm not sure how I feel anymore.
So what's up with reverse Flynn effect in Western and Northern Europe? Are people actually getting dumber lately? I blame TV.
So what causes homosexuality?
why do you think tons of "straight" people turn gay once they go to prison?
anyone can suck a dick but choose not to, then change their mind. there's not exactly some physics force preventing you from it
My friend just tried to convinced me that the light emitted by photos taken of nuclear blasts are radioactive. Problem is, I'm starting to believe him. Is this picture emitting radiation?
Can someone explain to me the relation between these two relativity situations
1. Time passes slower at the speed of light (the train example)
2. Time passes slower near a black hole
and also, would vibrating at the speed of light with a displacement of just let's say a micron have the same effect as the train example?
Hey /sci/, let's shoot eachother with equations
>Graphwar is an artillery game in which you must hit your enemies using mathematical functions. The trajectory of your shot is determined by the function you wrote, and your goal is to avoid the obstacles and your teammates and hit your enemies. The game takes place in a Cartesian Plane.
most important info from that page:
>The Normal Function...
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of all time and what is their accomplishment or accomplishments?
I really like Grothendieck from a personality perspective. I don't know math well enough to have a grasp on his accomplishments, but his 'relative' point of view is incredibly interesting.
The guy who's math I find most interesting is Chern I guess, I think geometry is cool as fuck.
which one are you?
What if I don't fit in. Am I duckface gendered ?
Is it our last common ancestor with the chimps, a proto-gorilla, or its own branch of apes?
Why hasn't science determined what food is optimal for human health? It seems like a basic thing but theres so much confusion about it. Fix the diet and all health problems would greatly diminish.
Basically, what's actually good for the human body is 100% contradictory to what nutritional science has "taught" us for the past decade. Humans are meant to eat as our ancestors did.
Lots of meats and fibrous, green vegetables is literally all we need. Carbs are an empty source of energy and make people fat and mentally foggy. And some highly processed carbs like the bread and pasta you buy in the grocery store are directly linked to cancer growth.
I'm off to make my millions in Vegas while all of you STEMlords get useless degrees in math and physics.
How is tea tree oil good for open wounds but bad for touching to mucus membranes? I used it topically on my penis and it somehow got inside my urethra. I pissed it out and I called poison control and they said I was probably fine. Yea tree oil is toxic if swallowed, but only deadly if you guzzle it.
Tea tree oil is a mucus membrane irritant but it's not as bad as swallowing.
I'm not sure if the symptoms I'm feeling from membrane contact would be the same as if I had ingested it. Any biologists or toxicologists around here?
if your school doesn't require these courses to graduate, then it's no better than DeVry.
>Single Variable Calculus
>Differential Equations (both ordinary and partial)
and if you plan to go to graduate school.
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>Nonlinear Partial Differential Equations
Oh yeah, I'm sure that's a standard undergraduate course at virtually all decent schools.
The rest is a decent list, a course like 'nonlinear partial differential equations' is a bit misleading unless from a certain perspective like conservation laws in physics or geometric structure.
We need a new invention to propel ourselves to the next level of technology, just like electricity, the steam machine and the computer did.
New methods of transport and interstellar travel.
For example a teleporter, or some kind of sci fi warp drive to get through space easily and colonize new planets. Well... We also need to find out how to colonize these planets properly.
What's the point of a PhD?
Ask your stupid questions here.
Am confused about this q. For the centripetal acceleration, shouldn't the r used be the actual radius of the circle, not the diameter?
Either way I get a different numerical answer than the one here, same magnitude though.
which of the black triangles produce less drag?
When I was 12 years old (I'm now 21) I remember taking this pretty hard math test as part of some international competition.
I was digging through my old room earlier and found the question booklet. So I ask you /sci/, what kind of maths were you doing when you were 12?
When I was twelve? Prealgebra.
And I was reading Goosebumps books and riding my bike to my friends' houses to play 3DO and build model rockets and catch grasshoppers in the green belt in our neighborhood and play spy games and argue about which of us had a bigger crush on girl X. You know, Wonder Years shit.
How was being pushed to succeed by overbearing parents?
I need someone who knows more about the mechanics of rigid bodies than I do.
I'm trying to be epic in Kerbal Space Program, and send a craft to the stratosphere using electric power alone.
However, everything I build has a problem in that it precesses, and eventually turns over.
I have no idea why.
I've put the center of lift above the center of mass, so gravity should be providing a torque that keeps the craft pointing upright.
Even if that torque makes the craft precess, the two fanblades in the center should damp the precession.
Instead, everything I build does this - it turns over until it's about 10 degrees above the horizon, and slams into the ground.
Even something like this, which should provide maximum torque towards keeping it pointed up (and also precess like crazy), turns over within 200 meters.
There is only one correct answer.
1 is the only small one
3 is the only green one
4 is the only borderless one
5 is the only circle
therefore all of them are "special" in some way, 2 is the only non-"special" of them, which means it's the actual odd one out.