How can the sun keep on burning? |
- How can the sun keep on burning?
- How does covid vaccine (or any vaccine) work in people suffering from AIDS since the immune system itself is compromised?
- Can the same mutation of a virus evolve independently in separate geographic locations, or do they mutate based on the unique stimuli of their regions and hosts?
- Why do seeds of *so* many fruits/vegetables primarily consist of polyunsaturated omega-6 fats?
- How does a virus mutate?
- How robust are commonly used SARS-CoV-2 PCR tests against mutations in the primer binding regions?
- Speed at which a COVID virus particle can attach to and invade a cell after it is inhaled?
- Do birds have butts?
- If our mathematics is "base 10", then why do we talk about "dozens" of things instead of "Tens"?
- Is the kinetic energy gained by the products of a nuclear fission reaction a consequence of Coulomb repulsion?
- Does the Earth/Moon system weigh less than the Earth and the Moon would on their own?
- Chemically, is cheese different after it's been melted?
| How can the sun keep on burning? Posted: 28 Dec 2020 05:01 AM PST How can the sun keep on burning and why doesn't all the fuel in the sun make it explode in one big explosion? Is there any mechanism that regulate how much fuel that gets released like in a lighter? [link] [comments]  |
| Posted: 28 Dec 2020 01:36 AM PST I'm curious about the medical details of it. If I know it right, HIV targets the immune system rendering it useless. Vaccines train the immune system by exposing it to the beaten-to-pulp version of the virus. How do vaccines train the immune system of AIDS patients if the system itself has been compromised? [link] [comments]  |
| Posted: 27 Dec 2020 05:44 PM PST For example, the new fast-spreading strain of COVID has been found in Ontario and BC in Canada, but originated in the UK. Could the same mutation have occurred independently in each region, or are the cases linked? [link] [comments]  |
| Why do seeds of *so* many fruits/vegetables primarily consist of polyunsaturated omega-6 fats? Posted: 27 Dec 2020 11:30 AM PST Like, even grape seeds and watermelon seeds! (in addition to sunflower seeds) I'd be fascinated to see if this is also true for orange seeds and avocado seeds... [link] [comments]  |
| Posted: 27 Dec 2020 01:06 PM PST I'm just curious to know in light of recent events on how a virus mutates. [link] [comments]  |
| How robust are commonly used SARS-CoV-2 PCR tests against mutations in the primer binding regions? Posted: 27 Dec 2020 10:34 AM PST How likely is it that infected individuals test PCR negative due to mutations in the primer binding regions? Do all PCR tests use the same set of primers or are there different variants (if yes, based on which considerations)? [link] [comments]  |
| Speed at which a COVID virus particle can attach to and invade a cell after it is inhaled? Posted: 27 Dec 2020 03:47 PM PST I know it depends on various factors, but realistically if a COVID virus enters the nose what kind of speed could be expected for it to successfully attach to a cell and start invasion? Seconds, minutes, hours? [link] [comments]  |
| Posted: 26 Dec 2020 08:51 PM PST My three year old was very concerned about this and I really don't know the answer. They have tails and they expel waste through a cloaca apparently, but do they have butts? [link] [comments]  |
| If our mathematics is "base 10", then why do we talk about "dozens" of things instead of "Tens"? Posted: 27 Dec 2020 11:03 AM PST Edit: Since the answers have stayed strictly in math, let's get to actual linguistics, why do we say "I ate dozens of apples that day" but not "I ate tens of apples that day" when we count base 10, not base 12? [link] [comments]  |
| Posted: 27 Dec 2020 08:28 AM PST I am wondering why this difference between nuclear fusion and fission exists. Fission is dominated by the kinetic energy increase of the products while fusion is dominated by radiation (correct me if that's wrong). So I thought that Coulomb repulsion between the products of a fission reaction (they are very close together immediately after fission) could explain it. But then again, the kinetic energy increase is covered by mass-energy-equivalence and this is a completely different concept than Coulomb repulsion. So this left me confused. [link] [comments]  |
| Does the Earth/Moon system weigh less than the Earth and the Moon would on their own? Posted: 27 Dec 2020 07:30 AM PST I'm reading about particle physics here so I'm likely to have made mistakes on both the small and large scales, but here goes: The energy in a system is distributed between movement energy and interaction energy. The negative interaction energy between a proton and an electron in a hydrogen atom is what keeps the whole thing stable. It would need energy to eject the electron. That negative interaction energy also means that the hydrogen atom has less mass than the sum of a lone proton and a lone electron. By analogy, the moon is in our obit thanks to gravity and it would take loads of energy to eject it. Does that analogy stretch as far as negative interaction energy and the Moon/Earth system having less mass than they would by themselves? What's the difference? [link] [comments]  |
| Chemically, is cheese different after it's been melted? Posted: 26 Dec 2020 08:10 PM PST |
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