What were the theories about the nature of stars before we began to understand nuclear reactions? |
- What were the theories about the nature of stars before we began to understand nuclear reactions?
- What is the scientific consensus about the polygraph (lie detector)?
- Are Neutrinos not faster than light?
- Do we need inflation?
- What makes a gene dominant or recessive?
- What is the truth behind the threat of "skipping off the atmosphere?"
- How does the number of chromosomes change upon species differentiation?
- What are the applications from understanding the behavior of superionic water?
- What factors make the Amazon river so absurdly large compared to every other river on Earth?
- How can we tell how far away a star is or how old it is?
- Does seminal fluid volume contribute to fertility?
- Why is sea foam white?
- What is the relevance/real-life application of knowing the specific heat capacity and density of liquids?
- How deep do you have to dig to reach stone?
- Is it true that babies only see in black and white until they’re 3 months old? If yes, can someone explain why?
- How does latent Tuberculosis work?
- Have we been able to take an image of an atom? If so, how does it work since they’re too small to catch light?
- Why is wind chill only defined for temperatures at or below 50°F and wind speeds above 3 mph?
- Are there any living organisms that can change the DNA of other organisms?
| What were the theories about the nature of stars before we began to understand nuclear reactions? Posted: 25 Sep 2021 12:12 PM PDT |
| What is the scientific consensus about the polygraph (lie detector)? Posted: 25 Sep 2021 06:25 PM PDT I got a new employment where they sent me to a polygraph test in order to continue with the process, I was fine and got the job but keep wondering if that is scientifically accurate, or even if it is legal, I'm not in the US btw. [link] [comments]  |
| Are Neutrinos not faster than light? Posted: 26 Sep 2021 03:35 AM PDT Scientists keep proving that neutrinos do not travel faster than the speed of light. Well if that is the case, in case of a cosmic event like a supernova, why do neutrinos reach us before light does? What is obstructing light from getting to us the same time? [link] [comments]  |
| Posted: 26 Sep 2021 05:41 AM PDT In my understanding, inflation has only negative sideffects, mostly in terms of understandability of the economy. Sure in the old times with gold standard it might have been unavoidable, but nowadays, is there any good in keeping it? [link] [comments]  |
| What makes a gene dominant or recessive? Posted: 26 Sep 2021 01:13 AM PDT What is the difference between a dominant or recessive gene? I know that dominant genes prevail over recessive ones and this is also the stuff I find on the internet. But I can't find an explanation of what makes a specific gene prevail over other ones in the fist place. [link] [comments]  |
| What is the truth behind the threat of "skipping off the atmosphere?" Posted: 25 Sep 2021 04:22 PM PDT In space movies, when the brave astronauts are about to re-enter, you often hear someone very solemnly pronounce, "If the angle of re-entry is too shallow, the capsule will skip off the atmosphere." Back on Earth, the astronauts' families cringe in fear, with the implication that this terrible thing must never happen. What is the reality of this? Have any of our spacecraft actually "skipped off the atmosphere?" If you did "skip off the atmosphere," where exactly would you go? Is this something that could be harnessed productively, like to provide lift or change course? Or is it just some movie metaphor? [link] [comments]  |
| How does the number of chromosomes change upon species differentiation? Posted: 26 Sep 2021 12:49 AM PDT I would like to know how the change in the number of chromosomes as an species evolves can be explained against the idea of "irreducible complexity", and what evolutionary advantage it brings to justify it being incorporated into the genome of the entire species. Bonus question: do species always evolve to have more chromosomes, or does the number sometimes reduce? [link] [comments]  |
| What are the applications from understanding the behavior of superionic water? Posted: 26 Sep 2021 07:32 AM PDT |
| What factors make the Amazon river so absurdly large compared to every other river on Earth? Posted: 25 Sep 2021 07:31 PM PDT I should note when I say large, I don't mean long, I'm talking about water volume that the Amazon discharges every day. Apparently its average discharge is 209,000 cubic metres per second, which makes it bigger than the next 7 largest rivers by discharge combined! I find that quite amazing and I'm wondering what factors play into this, I would assume that the latitude in the world's rainforest belt is important, but the Amazon is still a lot bigger than the Congo in the same latitude. Does the shape of South America help? It does seem quite unique in having very tall mountains on the far side of the continent with rivers flowing for thousands of kilometres straight to the Atlantic picking more water from massive tributaries along the way, and in the slightly circular shape of northern South America which sort of looks like it could funnel these rivers into the singular gigantic river you see in the Amazon. [link] [comments]  |
| How can we tell how far away a star is or how old it is? Posted: 26 Sep 2021 12:56 AM PDT |
| Does seminal fluid volume contribute to fertility? Posted: 26 Sep 2021 03:07 AM PDT To add detail to the question, if two men have identical counts, will the man with the higher seminal fluid volume have a higher chance of getting a woman pregnant? On a sub question to this, does length contribute to pregnancy? My thoughts are that a man has a shorter than average length, with a lower than average fluid output, and with a normal count is less likely to get a woman pregnant than a man with a longer length, higher fluid output, and a normal count. My reasoning behind my hypothesis is a longer length will get closer to the cervix and the more fluid released will help the sperm get to an egg. I don't have a complete understanding of the factors at play with male fertility, I wouldn't find it unreasonable if someone said it was only the sperm count that contributed to male fertility vs all the other potential factors. [link] [comments]  |
| Posted: 25 Sep 2021 08:26 PM PDT I'm not talking about long-lived foam here, just the foam that forms in breaking waves and disappears almost immediately. I can't find a particular name for ordinary sea foam. Anyway, near me the ocean is green, or bluey-green but the foam is so very white. Why is it so white? [link] [comments]  |
| Posted: 26 Sep 2021 02:16 AM PDT Most of the real-life applications of specific heat include those of solids or metals and water, but what about the other liquids? How is knowing their specific heat capacity benefitting us? Do they have a real-life application?? [link] [comments]  |
| How deep do you have to dig to reach stone? Posted: 25 Sep 2021 01:13 PM PDT My son has recently started minecraft, and he usually asks me questions about the game that I try to tie back to the real world. Recently, he asked me how deep he would have to dig in the real world to reach the equivalent of "cobblestone" and "bedrock", but I can't seem to find a clear answer online. Anyone willing to help? [link] [comments]  |
| Posted: 25 Sep 2021 09:12 AM PDT |
| How does latent Tuberculosis work? Posted: 25 Sep 2021 08:58 AM PDT Is it true that many people who have latent TB never develop the disease? Why are some people able to completely remove it from their body? And some just make it latent? [link] [comments]  |
| Posted: 24 Sep 2021 06:34 PM PDT |
| Why is wind chill only defined for temperatures at or below 50°F and wind speeds above 3 mph? Posted: 24 Sep 2021 07:14 PM PDT Do temperatures above 50F not experience a significant drop due to wind chill? What are the mechanics behind this cutoff point? [link] [comments]  |
| Are there any living organisms that can change the DNA of other organisms? Posted: 24 Sep 2021 07:06 PM PDT You'll often see this in science fiction or horror, where an animal will bite/cut/wound/etc another, which will change their DNA and cause wacky things like superpowers (Spider-Man) or turn them into monsters (Prometheus). Obviously it wouldn't be this extreme, but is there any precedent of organisms changing the DNA of other organisms in real life? (Retroviruses can insert themselves into the genome of their host, but they're not really alive so I don't know if I'd count that) [link] [comments]  |
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