- AskScience AMA Series: I'm Dr. Katie Mack, theoretical astrophysicist, TED Fellow, and author of The End of Everything, which describes five possible ways the universe could end. I'm here to answer questions about cosmic apocalypses, the universe in general, and writing (or tweeting) about science!
- If looking further into space means looking back into time, can you theoretically see the formation of our galaxy, or even earth?
- How much does personality really differ between sexes as compared to within-sex variation?
- why does the earth and the sea gets pulled towards the moon?
- The COVID strain in India?
- What is the lowest light humans can see??
- How stable is the sun compared to other G-Type Main Sequences Stars?
- Why empirical study uses notional value derivatives, not fair value?
- Why is static friction generally stronger than kinetic friction? What is happening at the atomic level to cause the difference?
- Can you build a superconductor battery?
- How is it possible that silverweed (Argentina anserina) can be "native" across different continents? Why wouldn't it have evolved into different species on different continents?
- Why are mountains so ‘disorderly’ or ragged when I thought it was just fault-lines or similar that made them?
- What medium fills the synaptic cleft?
- Can an infection of COVID-19 1 day after a second dose of vaccination compromise vaccine efficacy in future months ?
- How is the suturing done after open heart surgery? And how do they allow for movement immediatly post-op?
- What is the difference between conservation and constraint in regards to genetic sequence?
- How do we get perfectly accurate measurements for things if all experiments have inaccuracies?
| Posted: 28 May 2021 04:00 AM PDT Dr. Katie Mack is a theoretical astrophysicist, exploring a range of questions in cosmology, the study of the universe from beginning to end. She is currently an assistant professor of physics at North Carolina State University, where she is also a member of the Leadership in Public Science Cluster. She has been published in a number of popular publications, such as Scientific American, Slate, Sky & Telescope, Time, and Cosmos magazine, where she is a columnist. She can be found on Twitter as @AstroKatie. See you all at 1:30pm EDT (17:30 UT), ask me anything! Username: /u/astro_katie [link] [comments]  |
| Posted: 27 May 2021 10:29 AM PDT I mean, if we can see the big bang as background radiation, isn't it basically seeing ourselves in the past in a way? [link] [comments]  |
| How much does personality really differ between sexes as compared to within-sex variation? Posted: 27 May 2021 11:28 AM PDT I'm wondering about this because a common criticism of gay relationships is that men and women are complementary, but same-sex couples are not. However, it seems to me like sex is probably not a great predictor of complementarity. As far as personality goes, as long as there is significant overlap between the distribution of personalities for the sexes, it should be feasible to find complementary pairs both for homosexual and heterosexual couples. What I'm looking for is data that shows how much overlap there is between personalities for the sexes. Any related research would also be interesting :) Thank you! [link] [comments]  |
| why does the earth and the sea gets pulled towards the moon? Posted: 28 May 2021 05:25 AM PDT Since the gravity of the earth is greater than the gravity of the moon why does the seas get pulled there? lets say i know why the sea gets pulled towards the moon then why does the earth get pulled towards it since the gravity of the sun is greater and the gravity of the earth is greater than the gravity of the moon? Is the earth's attraction towards the moon the same amount of the attraction to the moon towards the sun? and if that's correct how does that make any sense since the gravity of the earth is greater than the gravity of the moon? [link] [comments]  |
| Posted: 28 May 2021 05:25 AM PDT Is the COVID strain that has been discovered in India more deadly in terms of altering the disease progression pattern? Media has been reporting that many people there are dying including the younger population. Anyone? [link] [comments]  |
| What is the lowest light humans can see?? Posted: 27 May 2021 11:22 AM PDT Not in wavelength, more as in lumens or lux, trying to see if certain sources are good enough to read by [link] [comments]  |
| How stable is the sun compared to other G-Type Main Sequences Stars? Posted: 27 May 2021 02:58 PM PDT I am curious about both short-term (Solar Cycles) and Long Term (Overall Evolution) [link] [comments]  |
| Why empirical study uses notional value derivatives, not fair value? Posted: 27 May 2021 05:17 PM PDT I am currently doing research on the relationship and the effect of hedging using financial derivatives on the size of risks in banks. And I noticed that most of the previous studies used the (Notional contract amounts) instead of the (fair value). Can anyone provide me with the scientific reasons for this, and is there a better way to determine the size of the use of derivatives in the hedging process? [link] [comments]  |
| Posted: 27 May 2021 11:51 AM PDT |
| Can you build a superconductor battery? Posted: 27 May 2021 11:36 AM PDT My physics teacher told me you can basically put a much electric energy in a superconductor as you want. She also told me that, if you would for example put two ends of the cable where the energy is flowing through together, the electricity would still flow through. So why don't we build super effective superconductor batteries? [link] [comments]  |
| Posted: 27 May 2021 10:35 AM PDT I was looking at silverweed's Wikipedia entry and it says that it is native throughout the temperate Northern hemisphere. Other websites seemed to confirm it is considered "native" in parts of North America, Europe and even Eurasia. This was surprising as I'd usually expect different "native" species of the same family of plants in NA vs Europe (such as the various kinds of maple trees). So why would silverweed be the same species on both continents? [link] [comments]  |
| Posted: 27 May 2021 06:07 PM PDT |
| What medium fills the synaptic cleft? Posted: 27 May 2021 03:29 PM PDT I was looking into the synaptic cleft and came across many diagrams like this they show the operation of impulse transmission but don't mention what the medium through which the neurotransmitters etc are moving. Is it just salt water? what is the ambient medium around cells? [link] [comments]  |
| Posted: 27 May 2021 06:02 AM PDT |
| Posted: 27 May 2021 01:15 AM PDT After a surgery, to most areas you can let the muscles rest and heal. With a heart surgery the heart needs to be strong enough immediatly post-op to withstand violent contractions, while maintaining a pressure differential. How is this achieved? [link] [comments]  |
| What is the difference between conservation and constraint in regards to genetic sequence? Posted: 27 May 2021 10:06 AM PDT I understand that within multiple sequence alignments you can identify conserved regions as all positions have the same nucleotide/amino acid. I also understand that constraint means the lack of variation but isn't that just the same as how conserved something is? If a region within a genome is highly conserved would it not be highly constrained as well? Can you have conserved sequences that also have lots of variants? [link] [comments]  |
| How do we get perfectly accurate measurements for things if all experiments have inaccuracies? Posted: 27 May 2021 09:15 AM PDT For example recently in lab we have been doing experiments regarding the enthalpy of alcohols. Because of heat loss and other factors the value we go was always below the 'ideal' value, begging the question how is it possible to get an 'ideal value' [link] [comments]  |
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