The oxygen level rise to 30% in the carboniferous period and is now 21%. What happened to the extra oxygen? |
- The oxygen level rise to 30% in the carboniferous period and is now 21%. What happened to the extra oxygen?
- Is there a difference between weapons grade uranium and "normal"(?)uranium?
- If you take an even number of fermions with 1/2 spin and bind them then the spin is now an integer and now a boson. Bosons do not follow Pauli's exclusion principle but fermions do, but now that the 2 fermions behave like a boson would they follow the principle or not?
- Do we find fossils with bone cancer?
- Why does the flu shot cause soreness at the injection site?
- Is it easier to make a vaccine for a bacteria or a virus?
- Are dogs better than a machine at detecting covid-19?
- Would creating a chain of satellites between Earth and Mars decrease the time it takes to communicate?
- How many photons does it take to make up a 'bit' in a fiber optic network?
| Posted: 26 Sep 2020 03:55 AM PDT What happened to the oxygen in the atmosphere after the carboniferous period to make it go down to 21%, specifically where did the extra oxygen go? [link] [comments]  |
| Is there a difference between weapons grade uranium and "normal"(?)uranium? Posted: 26 Sep 2020 06:24 AM PDT I've heard the term weapons grade a lot but I don't know how uranium could differ, other than potential isotopes? Are there different types of uranium? Different concentrations? [link] [comments]  |
| Posted: 25 Sep 2020 06:57 PM PDT Im gonna be honest, I'm not the smartest. Just a young high schooler that is curious with the world of science. A VERY long train of thought led me to fermions and bosons and now I ask this question which much curiosity. If I said something wrong or phrased something wrong please correct me. Thank you in advance! [link] [comments]  |
| Do we find fossils with bone cancer? Posted: 25 Sep 2020 08:08 PM PDT |
| Why does the flu shot cause soreness at the injection site? Posted: 25 Sep 2020 11:02 AM PDT I got my flu shot the day before yesterday and my arm is still rather sore. I haven't gotten a non-vaccine shot in a very long time. Do all shots do this? [link] [comments]  |
| Is it easier to make a vaccine for a bacteria or a virus? Posted: 26 Sep 2020 06:31 AM PDT I would figure bacterial vaccines would be easier because bacteria are larger and can weaken or kill them easier. But I am not sure. [link] [comments]  |
| Are dogs better than a machine at detecting covid-19? Posted: 25 Sep 2020 07:01 PM PDT I recently saw a couple news article that report pilot runs of using dogs to screen for covid-19 in airports or other areas where humans will be in close contact. At first I thought that sounded kind of cool, using search and rescue or explosive detecting dogs to screen for other things they can smell sounds neat. But unlike search and rescue and explosive detection, the detection of covid-19 is directed. Dogs are good at search and rescue because they can smell low concentrations of volatile agents and hone in on where they are coming from and can also quickly rule out one large area or another. Basically they are really good at knowing where to look. In the case of covid-19 the articles suggest that people provide a sample that the dog smells and issues a verdict, flagging it for further testing or not. But in order to train those dogs we must know what scent or groups of scents they are targeting. Can't we just sample the air and just as quickly test for the agent in question? Machines require no 2-6 week training period like a dog that already has thousands of dollars in training so it seems that a quick air sample would be better. Or am I missing something? [link] [comments]  |
| Posted: 25 Sep 2020 09:25 AM PDT |
| How many photons does it take to make up a 'bit' in a fiber optic network? Posted: 25 Sep 2020 12:44 PM PDT In a fiber optic network, 1s and 0s are represented by light or no light (simplistic view I know). My question is, how many photons does it take for the optic to sense a "1"? I'm thinking that link speed matters so lets say on a 100G link for easy math. [link] [comments]  |
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