- I use a P100 respirator to protect myself from infection, but sometimes powerfully malodorant smells (garbage full of diapers, etc) are noticeable through the mask. Does this indicate that I am at risk of infection from airborne sources, specifically corona virus?
- Would it be possible for falling objects to exceed sonic velocity and result in a boom?
- How does a ants nest not get destroyed or flooded in rain?
- What did paleolithic humans eat?
- Can viruses be detected during their incubation periods?
- What does "sustained blast wave" mean in the context of thermobaric weapons?
- Does pregnancy affect the total time a woman is fertile (time between the first and last menstruation)?
- How Do Countries With Second-Strike Nuclear Weapons Know Who Nuked Them?
- If Theia collided with Earth billions of years ago, causing debris to get knocked off and form into the Moon, does that imply that the Earth was once larger than it is today?
- Why do fundamental particles have to be point sized?
- Are people who experienced famine or forced starvation at a greater risk of developing eating disorders?
- Why do the „warm“ and „cold“ seasons happen a bit later than the „bright“ and „dark“ seasons?
- If young people have stronger immune systems than the elderly, and covid (to my understanding) primarily kills through severe immune responses and/or cytokine storms, how do most young people suffer mild symptoms while old have a higher risk of death?
- Some lizards detach their tail as a defence mechanism. How do they do it? How do they tear the muscles and bones in an instant?
- How does an echocardiogram bubble study accomplish anything besides an embolism?
- Was there more carbon in circulation when petroleum was formed?
| Posted: 21 Aug 2020 10:00 AM PDT |
| Would it be possible for falling objects to exceed sonic velocity and result in a boom? Posted: 22 Aug 2020 06:17 AM PDT Would it be possible if Earth's atmosphere was sufficiently thin/sparse such that the drag force on falling objects was limited enough to allow the terminal velocity to exceed the speed of sound thus resulting in a sonic boom when an item was dropped from a tall building? Or if Earth's mass was greater, such that the gravitational force allowed objects to accelerate to a similar terminal velocity? How far away are Earth's current conditions from a state where this phenomena would occur? [link] [comments]  |
| How does a ants nest not get destroyed or flooded in rain? Posted: 21 Aug 2020 05:46 PM PDT |
| What did paleolithic humans eat? Posted: 22 Aug 2020 04:22 AM PDT |
| Can viruses be detected during their incubation periods? Posted: 22 Aug 2020 04:11 AM PDT I know that an incubation period is the time between the virus entering the body and when it starts showing symptoms so by what I understand the swab test for COVID-19 should return positive even if the test was conducted during the virus' incubation period. I am not sure abut this tho and I couldn't find a good answer on google. Thanks in advance and sorry is this is kinda dumb [link] [comments]  |
| What does "sustained blast wave" mean in the context of thermobaric weapons? Posted: 21 Aug 2020 05:31 PM PDT |
| Posted: 21 Aug 2020 05:05 PM PDT Given that women are born with a certain number of eggs and that they do not menstruate during pregnancy, does getting pregnant extend the period of time before women get into menopause? [link] [comments]  |
| How Do Countries With Second-Strike Nuclear Weapons Know Who Nuked Them? Posted: 21 Aug 2020 11:42 PM PDT Imagine a scenario where there are four countries, countries A, B, C, and D who all have nuclear weapon first and second strike ability, and submarine ballistic missile launchers, and all of them have equally good relations with each other and no country does anything suspicious. All of their nuclear weapons have no difference between each other. Then, country B decides to use a sub to launch 10 nuclear weapons at country A. How does country A know country B nuked them, and not C or D? [link] [comments]  |
| Posted: 21 Aug 2020 07:15 PM PDT |
| Why do fundamental particles have to be point sized? Posted: 21 Aug 2020 01:33 PM PDT I was always skeptical of fundamental particles being point sized, shouldn't that lead to problems like infinite electric field energy around a particle? Or infinite densities? Why can't they just have a difinite size just like they have a definite mass, charge, spin etc? Does having a size lead to some issues? Or we just don't know? [link] [comments]  |
| Posted: 21 Aug 2020 05:10 PM PDT |
| Why do the „warm“ and „cold“ seasons happen a bit later than the „bright“ and „dark“ seasons? Posted: 21 Aug 2020 03:45 PM PDT 21st of June is the day with the most sun hours, 21st of December the one with the least. So why do the really hot days occur in July and August, and the coldest ones usually in January and February? (I live in Germany, if that matters) [link] [comments]  |
| Posted: 21 Aug 2020 03:30 PM PDT |
| Posted: 21 Aug 2020 04:22 AM PDT |
| How does an echocardiogram bubble study accomplish anything besides an embolism? Posted: 21 Aug 2020 07:47 AM PDT |
| Was there more carbon in circulation when petroleum was formed? Posted: 20 Aug 2020 08:00 PM PDT Is the carbon cycle a closed loop? If it is, where does all of the petroleum oil come from? Back when it was formed, there must have been a huge abundance of carbon and the atmosphere and carbon cycle must have been vastly different. Before industry, we had a relative equilibrium in the carbon cycle. Industry has released enormous amounts of carbon from the planet's oil reserves. But was all of the present carbon PLUS all of the buried oil-carbon one time all at play at the same time on the planet? How would the atmospheric greenhouse gasses have not completely roasted all life on Earth, making it more akin to Venus? [link] [comments]  |
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