Has the amount of COVID deaths caused the global population to decline when combined with other deaths from other causes? |
- Has the amount of COVID deaths caused the global population to decline when combined with other deaths from other causes?
- Do gravitational waves move at different speeds through different media like electromagnetic radiation?
- Can you make a star out of elements other than hydrogen and helium?
- Does an individual proton have multiple energy levels?
- Is there any instance in which the amplitude can change the period of a pendulum?
- How to think about conservation or permanence in evolution?
- Why and how does radiation cause dipole rotation in proteins/amino acids?
- Has any research been done on the effects of light pollution and the lack of visible stars on humans, similar to how the effects of green space have been studied?
- Why are sunburns, chemical burns, and burns from high heat all burns?
- What exactly is happening in the brain when you try to remember something but can't?
- What goes on at the edge of the atmosphere?
- Is there a limit to the number of materials and compounds that can be made or is it theoretically infinite?
- How big of a concern is dry socket when kids lose their baby teeth?
- Could a meteor impact split apart a tectonic plate?
| Posted: 14 Jun 2022 09:37 AM PDT |
| Posted: 14 Jun 2022 11:29 AM PDT |
| Can you make a star out of elements other than hydrogen and helium? Posted: 14 Jun 2022 08:08 AM PDT obviously most of the universe is H and He so this would never occur, but in principle if we got a sufficient amount of say oxygen atoms together ( a very large amount yes) could its own self gravity initiate nuclear fusion in the core and begin the main sequence of a star? [link] [comments] |
| Does an individual proton have multiple energy levels? Posted: 14 Jun 2022 10:10 PM PDT I can't see any obvious reason why the quarks it's composed of wouldn't be, potentially, in an excited energy state. Is there something that forbids this? If individual protons (or neutrons) have multiple energy levels, roughly what's the typical energy difference between them? [link] [comments] |
| Is there any instance in which the amplitude can change the period of a pendulum? Posted: 14 Jun 2022 04:10 PM PDT I need to settle a debate with someone. To be clear, we are talking about your average, everyday pendulum like you'd find in a clock or by tying a washer to the end of a string, standing on earth. From what I've always learned, the equation T = 2π√(L/g) defines the period of a pendulum. Neither the mass of the bob nor the amplitude have any affect on the period of the pendulum, only the length of said pendulum can change the amplitude. This person whom I'm debating is stating that with a "huge change in amplitude" (but didn't specify what "huge change" meant) the period will change. As I understand it, acceleration increases proportionally with amplitude and therefore the two cancel each other out. When I brought that up, they said, "an elliptic integral usually approximated with a series far too long for me to get into." and gave no other explanation. I have never studied this. I've asked for an explanation, but he's gone dark other than to say, "it's too complicated to get into." So, can a "huge" change in amplitude change the period, and what exactly did he mean by the elliptical integral comment? [link] [comments] |
| How to think about conservation or permanence in evolution? Posted: 14 Jun 2022 09:34 AM PDT Is there some kind of concept of evolutionary permanence that I can read about? Like, of course there's DNA: no creature will ever evolve on Earth that is not based in DNA. Right? And probably something similar, if weaker, applies to all the various crazy proteins and other stuff that makes a cell work. Like, look at how conserved photopigments are across the animal kingdom (even beyond, you can find photopigments in non-animals that might be evolutionarily related to the opsins in human and fly retinas, etc etc). Then you can get up to bigger scales, to things like cell types. Like, will there ever be a descendant of animals that has no neurons? It seems like, since neurons first evolved, they are stuck. I read a paper a while back on similarities between invertebrate and vertebrate neurons, and was amazed. They even use more-or-less the same neurotransmitters (if in different roles). Then bigger: since insects invented wings, virtually none of them have lost them (ants, sort of - and a few other very weird examples). And insects always have that exoskeleton and always will - no insect will ever evolve with an endoskeleton, right? And how tetrapods all have this 1-arm-bone then 2-arm-bone then lots-of-bones plan for their arms and legs (since they all started as fins-on-pegs). It seems like that just will never go away (though you might lose your arms and legs, like a snake, if you have them they always follow that plan). What do we call this phenomenon? [link] [comments] |
| Why and how does radiation cause dipole rotation in proteins/amino acids? Posted: 14 Jun 2022 05:02 AM PDT I don't really know much about o chem or chemistry much in general, so I'm just wondering. [link] [comments] |
| Posted: 14 Jun 2022 06:40 AM PDT I've had this question stuck in my brain for a few days. We know that light pollution affects a lot of animals in myriad ways, and that artificial blue lights really screw with our time clocks and sleep, and spending time in green space has both physical and mental health benefits. So, if spending time in green space is something we seem to need to thrive, what about the stars themselves? A big percentage of people have never seen the Milky Way at night because it's too bright at night now. I know people who didn't know it was something you could see with the naked eye, and had almost spiritual experiences seeing a proper night sky. Maybe it's a silly question, or maybe impossible to really study separately from the impact of artificial light in general. But I am curious if anyone has looked into whether the lack of stars at night has any effects on our health? [link] [comments] |
| Why are sunburns, chemical burns, and burns from high heat all burns? Posted: 14 Jun 2022 07:17 AM PDT Sunburns, chemical burns, and burns from high heat all look and feel similar, but their causes are very different. What do they all have in common, and more broadly what makes an injury a burn rather than something else? [link] [comments] |
| What exactly is happening in the brain when you try to remember something but can't? Posted: 14 Jun 2022 12:49 AM PDT What Chemical/Physical/Electric actions are taking place in the brain? [link] [comments] |
| What goes on at the edge of the atmosphere? Posted: 14 Jun 2022 04:32 AM PDT Specifically I'm asking about the edge of the gaseous matter surrounding the earth. Does it experience a tide? Does it flare up like the surface of the sun? [link] [comments] |
| Posted: 13 Jun 2022 08:57 PM PDT Assuming we're only concerned with currently known elements, is the number of possible materials and compounds that can be made limited? Because there's only a finite number of ways you can join and arrange the basic elements? Or is there something else at play that makes for potentially infinite derivatives? Why? [link] [comments] |
| How big of a concern is dry socket when kids lose their baby teeth? Posted: 13 Jun 2022 10:21 PM PDT |
| Could a meteor impact split apart a tectonic plate? Posted: 13 Jun 2022 02:40 PM PDT |
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