Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science | AskScience Blog

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Friday, July 22, 2022

Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science

Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science


Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science

Posted: 20 Jul 2022 07:00 AM PDT

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science

Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...".

Asking Questions:

Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists.

Answering Questions:

Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience.

If you would like to become a member of the AskScience panel, please refer to the information provided here.

Past AskAnythingWednesday posts can be found here. Ask away!

submitted by /u/AutoModerator
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Do the elements of supernovae stay within the range of the previous solar system? Is a solar system with a star of sufficient mass just recycling elements within that range?

Posted: 19 Jul 2022 09:15 PM PDT

I get that nebulae can be many AU's in diameter, but isn't the distance between solar systems much larger to the point where there would be very little cross pollination between solar systems? Also what happens to planets that aren't destroyed by supernovae? Are there gas giant sized planets drifting around within galaxies unattached to a star?

submitted by /u/tbird1134
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Are ants capable of flatulence?

Posted: 19 Jul 2022 05:37 PM PDT

How does the genetical difference between modern humans and our 300 000 year old ancestors compare to the genetical difference between our 300 000 year old ancestors and our 600 000 year old ancestors?

Posted: 19 Jul 2022 11:47 PM PDT

Some people are more prone to mosquito bites. What criteria does a mosquito use when selecting their victims?

Posted: 19 Jul 2022 07:35 PM PDT

When do gases uniformly fill a container vs layer by layer based on density?

Posted: 20 Jul 2022 02:46 AM PDT

Air in a closed container has Nitrogen, Oxygen, Carbon Dioxide, Water Vapour etc in an even distribution throughout the container, despite the N2 having a lower density (1.2 kg/m³) than oxygen (1.4kg/m³) or CO2 (1.9 kg/m³)

But in other cases, it is argued that the carbon dioxide will drop down (as in fire suppression systems), or hot air will rise etc based on differing densities.

Is it all about mixing - or are there other effects at play?

submitted by /u/KesTheHammer
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What does atmospheric pressure really tell us about anything? Can we use the number of hectopectares to divine something useful or even tangible? Like anything to do about the weather, chance of rain, temperature

Posted: 19 Jul 2022 11:36 PM PDT

I have a barometer that tells me a number in hPa (right now it says 1007, which is apparently close to normal? But what is the significance of that, of an- I assume- "normal level of atmospheric pressure"?) I can't figure out what the point even is of knowing this information at a given time! The only time in which I could see this being useful is if-whether weather conditions occur at corresponding hPa levels--if i could replace temperature, chance of rain, is it sunny or cloudy, etc. with it.. I have no idea what I'm talking about.

Can anyone just fill me in and explain atmospheric pressure, its significance to life- my life, every day life, anything

Hope this is the right flair, I couldn't find the one for meteorology or something.

submitted by /u/Lesbianseagullman
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Could trauma result in bicephaly in reptiles?

Posted: 20 Jul 2022 03:23 AM PDT

Forgive the weird question, but I was curious. From what I understand bicephaly in reptiles is typically caused by either genetic or environmental factors, the most common being abnormal incubation temperatures. I was wondering if there is any sort of physical trauma that could result in bicephaly, such as an egg being dropped or slightly damaged? If so, would it be possible for scientists to make a notch in a developing embryo and encourage bicephaly? I know it's kind of morbid, but I was really curious as to whether or not physical environmental factors have an impact on this since I couldn't find many sources surrounding it!

submitted by /u/svconfession411
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How do Projectile Tracking Systems actually function?

Posted: 19 Jul 2022 08:23 PM PDT

Especially with regard to the spinning mirror. I can't find a good source that explains how the mirror is capable of turning so quickly. Example footage here: https://youtu.be/z7H5_o4UYw4

submitted by /u/Otisliveson
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How long does it take naturally for silver to form? (not man made ones)

Posted: 20 Jul 2022 07:27 AM PDT

Is D-Ribose a precursor to Ribitol?

Posted: 19 Jul 2022 09:31 PM PDT

Is it possible for a new born to develop no genitals at all?

Posted: 20 Jul 2022 04:29 AM PDT

And if yes, in what genetical conditions? Would they physically develop more like a female or male?

I'm mostly interested in this to know if sexually "neutral" humans could exist, and how. If you need me to be more precise, please tell me !

Thanks for your answers!

submitted by /u/ShueiHS
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How can a bacteria have membrane bound organelles?

Posted: 19 Jul 2022 07:03 PM PDT

I just came across a video about the giant bacteria thiomargarita magnifica, which is visible to the naked eye and has membrane bound organelles. How is it classified as bacteria instead of protozoa with membrane bound organelles?

submitted by /u/Cyberman2277
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