Archived threads in /sci/ - Science & Math - 1828. page

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If I fill a balloon with helium, so that it floats, and put it in a car. Will it go to the left, or to the right when I make a sharp turn right?

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What would happen if a generator had the magnetic field used to generate current powered by the generator?
If the spinning coil was started off with an extremely high speed before the magnetic field was given a kickstart, could that create a magnetic flash due to the feedback loop of how fast angular momentum is turned into current?

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Why are all of the geniuses have curly hair?
>Euler
>Gauss
>Einstein
This proves that, if your hair is straight you are a brainlet.
Note that the reverse is not true though, you can still have curly hair and stupid.

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Let [math]a = 0.999999...[/math]
[eqn]
\begin{aligned}
10a &= 9.999999... \\
10a - a &= 9.999999... - 0.999999... \\
9a &= 9 \\
a &= 1
\end{aligned}
[/eqn]
[eqn]
\begin{aligned}
\frac{1}{3} &= 0.333... \\
\frac{2}{3} &= 0.666... \\
\frac{3}{3} &= 1 \\
\frac{1}{3} \cdot 3 &= 1 \; \therefore \; 0.333...(3) = 0.999... = 1
\end{aligned}
[/eqn]
[eqn]
\begin{aligned}
0.999... &= \left( \frac{9}{10} \right) \left( \frac{1}{1 - \frac{1}{10} } \right) \\
&= \left( \frac{9}{10} \right) \left( \frac{1}{ \frac{9}{10} } \right) \\
&= \left( \frac{9}{10} \right) \left( \frac{10}{9} \right) \\
&= 1
\end{aligned}
[/eqn]

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So what's the deal with Lung Cancer? It's the most common type of cancer worldwide and yet people insist its primarily caused by smoking. With so many people these days not taking up cigarettes and the lung cancer rate still high, why is it still so common? Was there another primary cause all along?

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From an evolutionary point of view, why do I want to hug this bear because I find it so cute and cuddly, even though it'll more than likely maul me to death?

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Why do people still believe ADHD is largely real?

>One in five American boys receives a diagnosis [for ADHD] by age 17.
>The authors suggest that when schools are under pressure to produce high test scores, they become motivated, consciously or unconsciously, to encourage ADHD diagnoses—either because the drugs allow low-performing children to score better or because ADHD diagnoses can be used to exclude children from testing. They didn't see comparable increases in places where the law kept school personnel from recommending ADHD medication to parents.

>“In 2001, No Child Left Behind put the whole country on notice that districts are accountable for scores,” Dr. Hinshaw notes. “But if you go back two decades earlier, in the early 1980s, some states got on the consequential assessment bandwagon earlier or the high school exam bandwagon earlier.”

>What the team found is that in states that enacted these measures early, within a couple of years rates of ADHD diagnoses started going up, especially for kids near the poverty line.

>This isn’t surprising as the diagnosis helps the school comply in several different ways, Dr. Hinshaw notes. If kids who are struggling with ADHD get treated, it should improve their functioning in school and hence their test scores. But it’s also the case he adds, that in many jurisdictions, if you get an ADHD diagnosis your test scores don’t count.

etc. etc.

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So abiut a year ago during an energy for the real world class we researched fusion. During one it talked about a facility that contained a massive fission or fusion explosion. (Forgot which) I unfortunately forgot the name of it and can't seem to find any mention of it. Any ideas?

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I'm was trying to solve for the electrostatic force given that the object was stationary and that m= 5 grams.
I realize now that mgtanθ=FE, but according to this quick picture I made, Fgy=FT, so (mgcosθ)(sinθ)=FE, but that's not right.

I was wondering if I did something wrong, or if doing it that way just doesn't work.

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Can we get a cringe/YLYL /sci/ thread going?

Post cringe worthy popsci quotes, new age bullshit, etc.

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Cross-posting from /diy:

My mom works in a pediatric doctor's office and the doctor knows that I tinker a little bit. He gave me this old centrifuge that has just been collecting dust for years, along with the tubes that go inside.

What are some neat things that I can make or synthesize using a centrifuge?

(I know that's not what it's for, but I'm curious, dammit.)

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Are humans really gonna fug this?

Hanson Robotics "Sophia" Female Companion robot

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So what is everybody's opinion on the Riemann Hypothesis?

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>analysis of genetic information indicated
>at least four interbreeding episodes,
>three with the Neanderthals,
>and one with the Denisovans
Reuters on Friday
http://www.reuters.com/article/us-science-interbreeding-idUSKCN0WK2SN

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Are limits rigourous? They seem to just be "oh, just eyeball where that function seems to be going"