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Sunday, February 18, 2018

Does a Mayfly, which only lives a day, evolve fast than a human?

Does a Mayfly, which only lives a day, evolve fast than a human?

Does a Mayfly, which only lives a day, evolve fast than a human?

Posted: 18 Feb 2018 03:50 AM PST

This might be really stupid but to me it makes sense, kind of. Evolution is about survival of the fittest right, so the more generations you have the faster changes take place and the weak are weeded out.

submitted by /u/Splattface
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What is the reason for Ethiopia demographic boom in recent years?

Posted: 18 Feb 2018 02:48 AM PST

I was browsing Wikipedia and according to it, in 2006 it had population of 74 777 981. In 2017, it is supposed to be ~105 350 020.

What's the reason for that boom?

submitted by /u/LodzNaStolice
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How does a flu vaccine lessen symptoms when you catch a flu variant that isn’t one of the variants in that seasons vaccination?

Posted: 17 Feb 2018 07:48 PM PST

How do earthquakes happen that are far from tectonic plates fault lines?

Posted: 18 Feb 2018 05:15 AM PST

Yesterday there was an earthquake in the UK. I live in Bristol and felt it. It was very small but it got me thinking...the earthquakes epicentre was apparently located in wales and some 7km underground (I think) but wales or the UK is not really close to a fault line so what may have caused this earthquake?

submitted by /u/mjonat
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How do astronomers know the "red shift" is coming from the Doppler effect and not from static stars producing light at a red wavelength?

Posted: 17 Feb 2018 03:06 PM PST

Would scientists not need a benchmark to know what wavelength the star is emitting and then what it is received at? If so, how do they determine the emitted wavelength?

submitted by /u/ds1749320
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Do NSAIDs, such as ibuprofen, reduce specific areas of inflammation or do they reduce inflammation overall?

Posted: 17 Feb 2018 01:41 PM PST

Are there any successful attempts to create a substance that is made up entirely with antimatter particles?

Posted: 18 Feb 2018 02:07 AM PST

Do other moons in our solar system have a 'near side' and 'far side' relative to the body they orbit?

Posted: 18 Feb 2018 04:01 AM PST

Our moon has a far side never visible from earth (AKA the dark side), and the near side that's always visible. Do other moons in our solar system, or in the galaxy at large, display similar behavior?

I'm also pretty curious as to how or why our moon happens to orbit in that way, as another question.

submitted by /u/Ergonomic_Prosterior
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Why do some plants need full strong direct sunlight but others need partial shade and indirect sunlight? What is the physiological/chemical reason behind this?

Posted: 17 Feb 2018 08:23 PM PST

[chemistry][nuclear physics] if the island of stability does exist, do we have any way of estimating what the behavior/properties of those elements will be like?

Posted: 17 Feb 2018 12:31 PM PST

Would Koko, the sign-language speaking gorilla, have been able to translate what a different, non-signing gorilla was saying?

Posted: 17 Feb 2018 08:20 AM PST

Most antibacterial sprays kill 99.9% of germs. What's the 0.1% of bacteria consist of?

Posted: 17 Feb 2018 10:15 AM PST

When sound waves interfere in air, they create beat frequencies. Does this also happen when electromagnetic waves interfere in space?

Posted: 17 Feb 2018 05:36 PM PST

When two electric waves heterodyne, they produce two products called sidebands (or heterodynes) equal to the sum and the difference of the original two frequencies.

Typically, this phenomenon takes place in a non-linear circuit element, such as a diode or a transistor.

Can this also happen if the waves are just moving through space, or maybe confined inside a resonant cavity or waveguide? Is it enough for the two waves to simply superimpose in space and interfere, to create the heterodynes? Or do they need to "multiply" somehow through a diode?

submitted by /u/wam235
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Is it possible for an object to be travelling so fast it would bounce off the atmosphere?

Posted: 17 Feb 2018 11:05 AM PST

Basically the title, but is there theoretically a speed/shape that if it were to collide with Earth's atmosphere at a certain angle it would bounce off the atmosphere like a rock skipping on water?

submitted by /u/KrackerJoe
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Is Crystallized Bismuth the Only Instance of Naturally Occurring Right Angles?

Posted: 17 Feb 2018 10:03 AM PST

Was watching a video about crystallizing bismuth and it occured to me that I can't think of any other place in nature where something forms right angles. Why does bismuth grow in right angles as opposed to more of a fractal shape and does this occur anywhere else in nature?

submitted by /u/7h3_W1z4rd
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How is the CMB used to calculate the Hubble constant?

Posted: 17 Feb 2018 08:39 AM PST

How do we know what the internal structure of planets and moons is?

Posted: 17 Feb 2018 04:39 PM PST

Would it be possible for a planet's day to be longer than its year?

Posted: 17 Feb 2018 07:27 AM PST
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Saturday, February 17, 2018

Is there any organism that has more than one brain?

Is there any organism that has more than one brain?

Is there any organism that has more than one brain?

Posted: 16 Feb 2018 05:20 PM PST

How much radiation does a luggage scanner deliver vs say medical x-ray?

Posted: 16 Feb 2018 08:51 AM PST

I saw this posted and was wondering how much radiation this lady was exposed too.

submitted by /u/TimeToSackUp
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Can someone explain the environmental impact of electric car batteries?

Posted: 16 Feb 2018 12:20 PM PST

Someone was telling me today that electric cars are worse for the environment because of the harm caused in battery manufacture. They said it was equivalent to 30 diesel pickups running twenty four hours a day for some huge number of days. I hope that isn't true.

Thanks.

Edit: Thank you again to everyone. The argument I was in started because I talked about retro fitting an auto with a motor and batteries, and charging with my houses solar system. I was told I would be wasting my time and would only be making a show off statement.

submitted by /u/custhulard
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Is body chemistry affected by sound, in the same way that melatonin production is affected by light?

Posted: 17 Feb 2018 06:52 AM PST

How do we know the temperature of the centre of the sun?

Posted: 17 Feb 2018 06:05 AM PST

How do they reproduce seedless fruits/vegetables ?

Posted: 17 Feb 2018 06:38 AM PST

Seedless watermelon for instance, where do they get the seeds to reproduce ?

submitted by /u/split_electron
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How have cancer treatments actually improved?

Posted: 16 Feb 2018 09:45 AM PST

We see headlines all the time about positive results in studies with mice, but what has translated to usable treatments in humans?

submitted by /u/SarahHeartzUnicorns
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Can a virus go extinct?

Posted: 16 Feb 2018 01:05 PM PST

Does breast size affect risk of breast cancer?

Posted: 16 Feb 2018 07:16 PM PST

How is Titan able to have an atmosphere pressure similar to Earth when it's gravity is so much lower than Earth's?

Posted: 16 Feb 2018 06:29 PM PST

Would it be theoretically possible to trap light with a strong enough set of magnets/electromagnets?

Posted: 16 Feb 2018 10:30 AM PST

I have heard of ideas like mirror boxes, but those wouldn't be very efficient, as light would slowly "Degrade(?)" as it loses energy when it bounces. I also know that light is sort of a particle and sort of an electromagnetic wave. Would it be theoretically possible to create a device that could hold light indefinitely by manipulating the light wave? I imagine this would take an unreasonable amount of energy, but black holes do it with gravity. Can you emulate that kind of orbit with a magnet or electromagnet?

submitted by /u/TheSupian
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Does knowing multiple languages actually alter your brain structure? If so, how?

Posted: 16 Feb 2018 02:08 PM PST

Why do we use four or more rotors on drones, but only maximum two on regular helicopters? Why are we not making full size quadrocopters?

Posted: 16 Feb 2018 11:03 AM PST

Is one more efficient for the size than another? More powerful? "We just alyways did it this way"?

submitted by /u/TerribleCommittee
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Is the color of an animal's covering (skin, furr, feathers, etc) determined by the amount of colors they can see?

Posted: 16 Feb 2018 05:29 PM PST

Are organisms trapped in amber mineralized fossils, the original tissue or a combination of both?

Posted: 16 Feb 2018 09:38 AM PST

Is it possible to have similar mass planets in a stable mutual orbit?

Posted: 16 Feb 2018 11:24 AM PST

Even if it's not possible naturally, could such a system be engineered?

When would the smaller object be considered a moon?

submitted by /u/Quicksilver_Johny
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Is it possible to make concrete a liquid again from a solid?

Posted: 16 Feb 2018 09:25 AM PST

I've seen videos where they un-mix liquids and some other crazy stuff that we never knew was possible, so with that being said would it be possible to make concrete back into the mushy liquidy material it was when it was being poured?

submitted by /u/That_Mann
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Does soapy water flow through pipes more quickly than plain water?

Posted: 16 Feb 2018 09:24 AM PST

What physical part of a tree absorbs Co2?

Posted: 16 Feb 2018 08:50 AM PST
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Friday, February 16, 2018

Do heavily forested regions of the world like the eastern United States experience a noticeable difference in oxygen levels/air quality during the winter months when the trees lose all of their leaves?

Do heavily forested regions of the world like the eastern United States experience a noticeable difference in oxygen levels/air quality during the winter months when the trees lose all of their leaves?

Do heavily forested regions of the world like the eastern United States experience a noticeable difference in oxygen levels/air quality during the winter months when the trees lose all of their leaves?

Posted: 15 Feb 2018 06:11 PM PST

If I were to release oxygen into the vacuum of space where would it go?

Posted: 15 Feb 2018 02:34 PM PST

Would it just float, would it be attracted to the strongest gravitational field, would it compress? In the case it floats would I be able to breath in space if I were standing in it?

submitted by /u/simplybasics
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Why are there so many types of cables?

Posted: 16 Feb 2018 06:11 AM PST

Why aren't all cables just the positive and negative wires side by side? What is the advantage of having coaxial cables and such?

submitted by /u/the-johnnadina
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Why don't they use jet engines for the first stage of rockets?

Posted: 16 Feb 2018 07:26 AM PST

I just learnt about specific impulse and how the specific impulse of jet engines is much higher because they don't have to carry their own oxygen. And that made me think; why don't they use jet engines for the first stage, when there's still oxygen around? Wouldn't that be much more efficient?

submitted by /u/GwnRobin
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why does placebo work?

Posted: 15 Feb 2018 08:32 AM PST

Why do your hearing get slightly reduced when you yawn?

Posted: 16 Feb 2018 04:50 AM PST

How did the Apollo lunar transfer stages end up in a solar orbit?

Posted: 15 Feb 2018 03:16 PM PST

After the lunar injection burn, the Apollo crew and the transfer stage were on a free return trajectory. Why didn't the stage slingshot around the moon and burn up in Earth's atmosphere?

submitted by /u/cowrider350
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Do astronauts have difficulties with swallowing and digestion?

Posted: 15 Feb 2018 12:12 PM PST

Would weightlessness mean that food and water floats around inside your body, making digestion hard? If so, how is it dealt with?

submitted by /u/OrangeApple_
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How do moving electrically charged particles cause magnetism?

Posted: 16 Feb 2018 03:28 AM PST

I understand that magnetism and electricity are 2 side of the same coin and that one causes the other. But why? How come an electric current create a force that isn't in the direction of the momentum of the electrons?

submitted by /u/swellfellow33
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Is electricity affected by gravity?

Posted: 15 Feb 2018 01:13 PM PST

Why is the land around Mt Fuji so flat?

Posted: 15 Feb 2018 04:53 PM PST

I have seen pictures and topo maps of Mt Fuji (https://goo.gl/maps/GuWNF7kGGso), and the land surrounding the mountain is impressively flat, then impressively mountainous.

Is this unusual? How does this happen?

submitted by /u/the-silent-man
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Can gas vehicles be converted to electrical, on mass, efficiently?

Posted: 16 Feb 2018 03:04 AM PST

With recent advances in electric vehicles, and several governments committing to the elimination of fossil fuel use, I'm reminded of the period of time where cars were converted from leaded to unleaded petrol. I remember my parents having to get a catalytic convertor fitted at their expense.

Is this type of conversion something we should expect to see soon? And if so, is it going to be remotely affordable for the masses?

submitted by /u/PsyPup
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Why are there layers of clouds in the sky?

Posted: 15 Feb 2018 09:53 AM PST

I noticed this while flying. There's one main layer of clouds but multiple layers above it. Are these not clouds of water? Or does water condense into clouds at different heights depending on pressure and temperature?

submitted by /u/TriTheTree
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Is it possible to fire a bullet around the earth using only the force of the initial blast?

Posted: 15 Feb 2018 11:13 PM PST

So i was thinking, rockets can travel around the earth, but they use a propulsion system.

So i was wondering if it is possible for a bullet to do the same utilizing nothing but the initial blast, gravity, and the wind.

It wouldn't matter how big it would have to be or what shape or how big of a blast is needed, just if it is possible at all.

submitted by /u/HypNoEnigma
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Where do scientists get so many mice with cancer for their cancer research?

Posted: 16 Feb 2018 04:11 AM PST

And how do you force a mice to have cancer in first place?

submitted by /u/ToniT800
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Is the rate of decrease in the Equatorial Bulge significant in relation to sea level rise?

Posted: 16 Feb 2018 03:08 AM PST

I just went down the rabbit hole reading about the Equatorial bulge. Given that the earth's rotation is slowing minutely, is the decrease in the 21 km Equatorial bulge significant enough to make any noticeable difference in sea level rise at the equator?

Edit: double word

submitted by /u/FallofftheMap
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How close do stars have to be before they're considered a binary system?

Posted: 15 Feb 2018 08:53 PM PST

Perhaps a better way to ask would be how far apart can they get before their gravity no longer affects each other?

I bet these values differ given masses and all, but is there a rough average?

submitted by /u/_S_A
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Why can some properties (super magnetism, quantum entanglement, etc) currently only work efficiently in the extreme cold?

Posted: 15 Feb 2018 11:05 PM PST

Has the expansion rate of the universe always been strictly increasing?

Posted: 15 Feb 2018 05:57 PM PST

To explain what I mean: I've been told the universe began with a period of ultra-rapid expansion. I've also been told that the universe is still expanding today and at an accelerated rate. The use of 'ultra-rapid' gives me the impression that it was expanding faster in the past than it is now, but this seems to imply the acceleration slowed at some point to reach the current rate.

I've read all the questions in the FAQ on expansion, which confirms the parts that are confusing me but doesn't seem to discuss the rate of change in acceleration (or if it did I couldn't find or understand it). One part of the FAQ says "the Universe was left expanding ever since [the big bang]" while another part says the universe was "expanding far FAR FAR faster than it does now"

So did the acceleration start ultra-rapid, slow down, and increase again? If not, what's actually going on? If so, when did the slowdown happen, and could it happen again? I have only a high-school level understanding of space science, please consider my education level when writing your response.

submitted by /u/QuestionsBurnerAcct
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Why don’t thunderstorms occur in the snow?

Posted: 15 Feb 2018 09:27 PM PST

Does it have something to do with the freezing temperatures?

submitted by /u/L2R2L1
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Why can we feel cramps or stomach aches? Do we have nerve endings inside of our body?

Posted: 15 Feb 2018 02:29 PM PST

Is there any limitation to scaling flux pinning?

Posted: 16 Feb 2018 01:01 AM PST

I read the Wikipedia about flux pinning and as far as I could tell, there were none. I'm a complete layman, so it's possible I might have missed something. By scaling, I mean: 1. Most Youtube videos take a magnet and a type 2 superconductor and have the former levitate over the latter. So can a super-strong magnet achieve stronger effects? Like can a Florida Bitter design be super strong? 2. Can the size of the setup of such a levitating experiment have any limits?

As I already mentioned, I'm a complete layman, so I'd appreciate it if you broke the limitations, if any, into simpler terms.

submitted by /u/NervousRing
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How is electricity transferred from clouds despite​ air being a insulator?

Posted: 16 Feb 2018 12:54 AM PST

What determines the height and volume of clouds?

Posted: 16 Feb 2018 12:50 AM PST

How come some clouds are much higher than others and why is it that some clouds are feather like while some are really fluffy?

submitted by /u/_shouldbevincent_
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