Why are the elements "Technetium" and "Promethium" radioactive when all other radioactive elements have much higher radioactive numbers? |
- Why are the elements "Technetium" and "Promethium" radioactive when all other radioactive elements have much higher radioactive numbers?
- Can radiation be 'removed' or neutralised in anyway? (Even if just in theory)
- Why are there pills for some allergies but not others? Example: there are pills for seasonal allergies but not for peanut allergies.
- Homo Sapiens of 300.000 years old or Biblical 6000 years of manhood: Carbon dating?
- What is the difference between ATLAS and CMS?
- How does Earth's eccentricity change over time?
- Can the strands of DNA accidentally get tied into a knot?
- Is there a physical limit for the size of a star?
- Could we (in theory) build floating houses using satellites?
- The Huygens probe hit Saturn's Moon (Titan) in 2005. If we would land there in 2017, would it still be intact or recognizable since Titan has tough weather?
- Atomic Force Microscopy Explanation?
- Why is the probability of a fast neutron causing fission lower than that of a thermal neutron?
- Is it faster flying opposite the Earths rotation?
- Ask Anything Wednesday - Engineering, Mathematics, Computer Science
- How does a circuit breaker detect a problem?
- Do the other 8 planets have a necessary effect on keeping Earth in the "Goldilocks Zone"?
- How does the Bernoulli effect relate to the Coanda effect? Is one a generalization of the other?
- Would aluminium spontaneously join to itself in a near-vacuum?
- How did the systems work on the first NASA spaceships without computers?
- Can someone please explain why escape velocity is necessary?
- When is Mt. Rainier projected to erupt again?
| Posted: 08 Jun 2017 05:32 AM PDT |
| Can radiation be 'removed' or neutralised in anyway? (Even if just in theory) Posted: 08 Jun 2017 06:51 AM PDT |
| Posted: 07 Jun 2017 10:14 PM PDT Got my first mosquito bite of the summer today! Itches like a mother lover. I applied some anti-itch cream which seemed to help, but I couldn't help but wonder why we have pills for certain types of allergies and not for, say, a mosquito saliva allergy. Am I missing something here? Are all allergies really that different? If so what makes them that way? [link] [comments]  |
| Homo Sapiens of 300.000 years old or Biblical 6000 years of manhood: Carbon dating? Posted: 08 Jun 2017 04:02 AM PDT Today I red on a news website that they found another human skull in Morocco, dated as apr. 300.000 years old: https://www.nytimes.com/2017/06/07/science/human-fossils-morocco.html?_r=0 I'm very interested in this because at I'm trying to determine wether science is right about our world history, or the Bible. Since the Bible claims that humans exist for only 6000 years, direct evidence of a human skull of 300.000 old would be most easy way to falsify the bible. Before I make that assumption, I wonder if those datings are accurate (enough). I red that scientists determine the formulas for carbon dating with trees and tree rings. I red that tree rings are pretty accurate in dating trees, and by comparing the rings of trees with the carbon in the trees, and with other objects we know the dating of, they could determine the relationships between carbon decrease and time. Thus, using this formula we can extrapolate carbon dating on other objects, that are much older than the trees used to verify the carbon decrease formulas. At the other hand, Bible defenders claim that these extrapolations aren't reliable (enough?), for longer time measurements. Since (I red that) the objects used with the longest known timeframe, the trees, aren't older than a few thousand years old, we can never be sure if the constructed formulas would work for much longer time periods. To support this claim, they claim that probably the Biblical flood (a.k.a. Noach's ark or the epos of Gilgamesj) is responsible for destroying trees older than a few thousand years. Besides having no reliable evidence of accurate extrapolations, the flood could have been interfering with radiation that has an impact on carbon decrease. That's why I wonder the following:
I hope you can give me some good evidence or information, so I can apply this on my study of science vs. the Bible! [link] [comments]  |
| What is the difference between ATLAS and CMS? Posted: 08 Jun 2017 06:00 AM PDT I was wondering what the difference between both was. Both detector wise and the way they treat their channels (like H->gamma gamma, etc). I've been trying to read the papers but they seem too technical to me. [link] [comments]  |
| How does Earth's eccentricity change over time? Posted: 07 Jun 2017 07:54 PM PDT Known as Milankovitch cycles, Earth's eccentricity changes from nearly circular to elliptical, which is the hypothesis for the formation of ice ages. How does this work? [link] [comments]  |
| Can the strands of DNA accidentally get tied into a knot? Posted: 07 Jun 2017 05:08 PM PDT |
| Is there a physical limit for the size of a star? Posted: 07 Jun 2017 02:03 PM PDT I mean when the temperature of the core of the star reaches to 15.000.000 K, fusion begins, thus a star ignites. When the star ignites, the surrounding gas and clouds are gradually pushed forward as far as I can uderstand from documentaries, right? If this is the case, then why are some stars much much bigger than the others? [Is there a limit for how much big a star can be when it is formed?] You may answer that there is plenty of hydrogene which makes stars bigger, but no matter how much fuel there is, the point of fusion is fixed and once the star is born the rest of the material is cleared around. What am I missing? Note: Sorry for English, it is not my native lang. [link] [comments]  |
| Could we (in theory) build floating houses using satellites? Posted: 08 Jun 2017 04:11 AM PDT Assuming the satellite couldn't be pulled out of orbit, could we in theory hang something (i.e a house) from a satellite in geosynchronous orbit so that it appears to float (let's say maybe 20 or so feet off the ground)? If possible, how strong cables would we need to support it? Also, would it even stay in the same place, or gradually drift over time? Thanks for any responses! [link] [comments]  |
| Posted: 07 Jun 2017 02:20 PM PDT I'm asking this because Saturn's Moon Titan has weather. Methane and nitrogen rises up and rains down as liquid methane and liquid nitrogen. Does this damage the probe somehow, making it unrecognizable? [link] [comments]  |
| Atomic Force Microscopy Explanation? Posted: 07 Jun 2017 04:47 PM PDT I have been trying to read up on how AFM works and am having trouble understanding- can anyone here help a struggling biochemist out? [link] [comments]  |
| Why is the probability of a fast neutron causing fission lower than that of a thermal neutron? Posted: 07 Jun 2017 12:10 PM PDT I understand that it happens. I've seen the charts and understand the math but what I can't figure out is why. It seems counterintuitive that a slow moving object is more likely to break apart something than a fast moving object. Any theories/explanations for this would be super helpful. [link] [comments]  |
| Is it faster flying opposite the Earths rotation? Posted: 07 Jun 2017 03:17 PM PDT Is there a difference in which way you fly around the Earth. E.g Flying from east to west or west to east. [link] [comments]  |
| Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 07 Jun 2017 08:07 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer 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! [link] [comments]  |
| How does a circuit breaker detect a problem? Posted: 07 Jun 2017 12:46 PM PDT Like when the breaker jumps. How does it detect that there's too much electricity or something (probably not electricity, I don't know what it it). [link] [comments]  |
| Do the other 8 planets have a necessary effect on keeping Earth in the "Goldilocks Zone"? Posted: 07 Jun 2017 06:44 AM PDT This question stems from a conversation I had with my SO, that ended with the following: "If all the planets in our solar system suddenly magically disappeared, what would happen to Earth?" What are some other similar scenarios and how could they play out? [link] [comments]  |
| How does the Bernoulli effect relate to the Coanda effect? Is one a generalization of the other? Posted: 07 Jun 2017 02:29 PM PDT |
| Would aluminium spontaneously join to itself in a near-vacuum? Posted: 07 Jun 2017 11:51 AM PDT It seems crazy to me, but from what I've read, the reason metallic bonds can't spontaneously form between two blocks of aluminium in physical contact is because the outside layers of molecules are aluminium oxide, which can't form the metallic bonds. So if the outside layers could be prevented from becoming oxides by removing the oxygen from the air around the metal, could it spontaneously join to other solid pieces of the metal? I may be misunderstanding the theory a lot here. I assume the joining would require some energy input? Not sure if physics or chemistry is more appropriate. [link] [comments]  |
| How did the systems work on the first NASA spaceships without computers? Posted: 07 Jun 2017 01:58 PM PDT Google tells me the first space launch was in 1961. However, back then, computers were around the size of a fridge or bigger. How did the life-support, and other systems function on rockets back before modern computers. Was it mostly mechanical? Or was there a mainframe type thing somewhere in the spaceship that could perform necessary tasks? [link] [comments]  |
| Can someone please explain why escape velocity is necessary? Posted: 07 Jun 2017 11:34 AM PDT So here's my thought: if I have a rocket (let's pretend for the moment it has infinite, weightless energy with which to move) and I take off at say, 100 kph. If I keep a constant velocity what will prevent me from leaving the planet? [link] [comments]  |
| When is Mt. Rainier projected to erupt again? Posted: 07 Jun 2017 07:39 AM PDT |
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