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# /sci/ Science & Math

## Most viewed threads in this category

/sci/ is the second smartest board so I ask you, what is the science behind Water Filters? If I live in a 1st world country (Canada) do I need filters, have they been proven to help? Are the health benefits noticeable, empirically sound?

Questions that don't merit their own thread. In my university lab work, I've seen both significant figures and the "rule of twenty" applied in error analysis. Which of these is standard in your country? Could anyone share the reasoning behind the rule of 20? Our lab instructors basically told us to do it and stop asking questions.
Let's say u are trying to prove that the derivative of a certain function is a certain expression. U notice a pattern when u draw the graph of the function. U then try to prove that it is that expression by letting the expression be equals to the expression formed from first principles. U end up with 0=0. Is that a form of "proof" as it applying to all of x? Pic not related
Does the sky really look like this in the desert or is it photoshop/enhanced? When I look at the sky in my country it doesn't ever look like this picture, I can't see the galaxies in the sky
Is there another way of learning the list of perfect squares or do I just need to memorize them?

### New Mars anomaly

What is this, /sci/? It was found on Mars.

### InterSteller Travel

Whats your opinions on InterSteller Travel

### ?

Natural numbers are the true numerals.
Hi /sci/, I don't know a lot about infinite sums, but I've been playing around with them in desmos and I found this one that does seem to converge but I don't know what to. Also, infinite sum thread.
hello /sci/ I want to do something different today I noticed that this is an image board but you are all talking. let's talk, just, a little, less. I am going to post some images I want you to post images of things you either know a relationship exists, or instinctually feel there is a relationship between. People will feel the need to argue, explain, and defend. I propose we don't. I also propose the images are beautiful, or captivating, and that they are images found in nature, or illustrations of nature, not language. Let's see to what we think, not listen to what we say.
Sup /sci/ How does it feel to know you'll never be able to approach this level of mathematical skill? I apologise for the blurry quality, the majority of you wouldn't even be able to follow along with the first few steps anyway so it hardly matters.
So the other day I was thinking about something while sitting on the toilet. I don't know if you guys have tried this, but when you pull on the toilet paper fast enough (if the toilet is fixed against the wall on a mount like in the image) you can rip the toilet paper easily. Yet, when you pull on it slowly, it doesn't. I imagine the paper being stationary. And the paper edges have a certain amount of tension before they rip. But how can the stationary force be changed depending on the amount of the pull force? Can it be explained in physics terms? I took basic physics this past summer, so excuse my dumb ideology if I'm wrong in anything. Pic related.

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