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Friday, February 24, 2017

Is it possible to Yo-Yo in space?

Is it possible to Yo-Yo in space?


Is it possible to Yo-Yo in space?

Posted: 23 Feb 2017 10:52 AM PST

We had a heated debate today in class and we just want to know the answer

submitted by /u/TasteeTreez
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Is there an "absolute zero" speed?

Posted: 24 Feb 2017 05:03 AM PST

It's pretty commonly known that the speed of light is the fastest possible speed in the universe, and that it is impossible for matter to go that fast. Even if they did reach that speed things would appear strange thanks to relativity. What about the opposite though? Is there an equivalent "absolute zero" speed? Would there be any weird consequences with relativity?

submitted by /u/scamp41
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What body system does fat belong to?

Posted: 24 Feb 2017 06:36 AM PST

If they can be part of different systems, are there other examples of tissues that are not strictly monogamous?

submitted by /u/stikkit2em
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If I were to dip a white hot steel rod in water, would it produce higher/lower pitched hiss than if I were to dip a red hot steel rod in water? Would the temperature of the water also have an effect on the pitch of the hiss?

Posted: 23 Feb 2017 09:31 PM PST

Why are the air intakes of fighter jets so often on the bottom of the plane?

Posted: 24 Feb 2017 03:27 AM PST

Just as an example, the F-16 is like a vacuum cleaner, and will suck up ANYTHING off the ground nearby. That's a problem when rocks, tools, and bolts, get sucked up into the air intake, so I'm wondering why they continue to be below wing level.

As I'm not an aeronautical engineer, the only good reason I can think of so far is to have the cockpit out from in front of the intake. Is there more to it?

submitted by /u/spudman238
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[Psych] Is priming though question order a concern when creating psychometric tests?

Posted: 23 Feb 2017 08:30 PM PST

For instance, if you ask someone how many dates they've had in the last month, and then ask them how happy they are, their second answer is likely to be more affected by the first than if you'd just asked them about their happiness, since they're now thinking about happiness with a focus on romantic success. I would imagine that this kind of thing happens in a lot of cases, and that question order has a significant impact on the results of psychometric tests. Does this have a significant effect, and if so, how do psychologists tackle this issue when creating questionnaires?

submitted by /u/meatotheburrito
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On 'Frozen Planet' David Attenborough said some birds migrated 11,000 miles for food. How do they know how to do that, and where to go?

Posted: 23 Feb 2017 10:23 PM PST

Whats the largest known Hydrocarbon and what are its properties? I have tried looking in all available books, text books and the internet.

Posted: 23 Feb 2017 08:26 PM PST

Time Dilation from the perspective of a Muon?

Posted: 23 Feb 2017 10:32 PM PST

Hello everyone. I've been trying to wrap my head around this fully for the past couple of days, but I haven't found a clear answer on this specifically. In regards to time dilation,we know that on earth, we observe a much longer lifetime for the muon than they do, with their proper time being around 2.2 us. From the muon perspective, though, shouldn't it also see us as being slower as well? Mathmatically, would it observe a time dilation of t/gamma2, where t is the original measured time by a a stationary observer on the earth? If not, what am I missing, as I am still struggling with this.

submitted by /u/Quick_Question404
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What makes something a strong acid?

Posted: 23 Feb 2017 11:08 PM PST

I understand that strong acids, like HCl, completely dissociate in solution but what makes HCl a strong acid in the first place? What are the properties of its individual components that cause it to be a strong acid?

submitted by /u/cqferrier
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Would you see the same constellations on the Moon or Mars as you do on Earth?

Posted: 23 Feb 2017 11:03 PM PST

Are there better odds if the person switches the case at the end of Deal or no deal?

Posted: 23 Feb 2017 11:59 PM PST

Wouldn't it be the same s the monty hall paradox or is it different because the person chose the cases and not the host?

here is what I mean. https://www.youtube.com/watch?v=H9CQscwXBt0&lc=z13jcbwaewvkwz1i504cc11rtvnjjjdrixg0k.1487888698718059

submitted by /u/LiquidNipples
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How do we clean oil spills and what effect do spills have on the environment?

Posted: 23 Feb 2017 05:10 PM PST

Where did the variable names x y and z come from for axis?

Posted: 23 Feb 2017 12:06 PM PST

Will being near a large particle accelerator such as the LHC cause a magnetic compass to drift from true north?

Posted: 23 Feb 2017 07:47 AM PST

If I am walking near the LHC on the surface how close would I have to be for my magnetic compass to drift an appreciable amount due to the strong magnetic field?

submitted by /u/casablunka
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How can landslides be minimized?

Posted: 23 Feb 2017 07:37 PM PST

How much of a problem are the high energy neutrons from the ITER?

Posted: 23 Feb 2017 09:02 PM PST

I know that they're apparently using a lithium blanket to absorb them, but I was unclear if it completely addresses the problem.

submitted by /u/Rijn123
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Is there a good way to utilize heat energy (steam mechanical) to yield electricity that bypasses the counter-electromotive force?

Posted: 23 Feb 2017 02:48 PM PST

I'm thinking not...

submitted by /u/FondOfDrinknIndustry
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Why did we have to defrost freezers and why don't we have to do it anymore?

Posted: 23 Feb 2017 10:36 AM PST

Can food be charred to where it will not be digested or adsorbed?

Posted: 23 Feb 2017 10:44 PM PST

Can food be cooked to the point where the body is unable to absorb it for nutrition?

submitted by /u/somethingtosay2333
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How does the body handle excess amounts of Vitamin C?

Posted: 23 Feb 2017 07:59 AM PST

Many people start mega dosing Vitamin C when they feel the effects of a cold coming on. After reading a few sources today, I've come across a few that say that, as vitamin C is water soluble, a small amount exceeding the DV is excreted. I've also read that it definitely is not excreted, and that Vitamin C excretion is a blatant myth. Additionally, some sources say that in times of sickness or a stressed immune system, exceeding the DV, as long as the dosing is broken up throughout the day, does help boost the immune system and, as the body uses this excess Vitamin C, it is generally not excreted.

So what's the truth? Any recommended sources I can read?

(My last post was worthy of r/titlegore, so I reposted.)

submitted by /u/wystful
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Is the power spectrum of a real signal always of positive amplitude?

Posted: 23 Feb 2017 09:33 PM PST

The power spectrum, P_T1, of a time series, T1, is the Fourier transform of the autocorrelation of T1. If T1 is purely real, then for negative frequencies, P_T1 is simply the complex conjugate of itself for positive frequencies.

But does the amplitude of P_T1 have to be positive? As far as I can tell, there is nothing specific about the Fourier transform or autocorrelation that requires P_T1 to have a positive amplitude for its entire (frequency) domain. Yet for all the spectra I see, they are always positive-valued. Why is this?

submitted by /u/CallMeDoc24
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