How does our body know when we need to drink water? |
- How does our body know when we need to drink water?
- How does gut bacteria/fauna survive when a person is in a coma or being fed intravenously?
- It's widely accepted that there is a universal common ancestor for all life forms on earth. Is there evidence that there is a last common Universal ancestor for viruses?
- How to identify a fossil?
- Is an infinite series countable?
- how can an entire muscle fibre contract/ shorten, if the sarcomers become shorter by moving the z- lines closer together?
- Are planets still forming or is the universe at a stage where that process is mostly complete?
- Are there petroleum byproducts that are used for producing common household materials that will run short as we transition off fossil fuels?
| How does our body know when we need to drink water? Posted: 23 Aug 2020 06:23 AM PDT |
| How does gut bacteria/fauna survive when a person is in a coma or being fed intravenously? Posted: 23 Aug 2020 06:23 AM PDT |
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| Posted: 22 Aug 2020 10:53 PM PDT |
| Is an infinite series countable? Posted: 22 Aug 2020 11:52 AM PDT Suppose I have an infinite series of rational numbers, starting from 0 and converging to 1. Does this set contain the limit point at 1? If it does/doesnt, does that make it a closed/open set? If it is closed (contains the limit), does that make it uncountably infinite? My thoughts being that at the limit you end up with some kind of continuum like the reals. Im Not an expert in maths just curious. [link] [comments]  |
| Posted: 22 Aug 2020 07:23 AM PDT im doing revision for a physiology exam and i realize that i don't understand how muscles contract. i understand the contraction of a single sarcomere , but not how that is supposed to work with several, or thousands of them in a row to contract an entire fibre. my problem is: if the h- band and the i- band both shorten while the a- band keeps its length, moving the z-lines closer together, how can the neighboring sarcomere do the same? do the m lines respectively move towards the point where the muscle is fixed? what decides in which deriction the m-lines move, if they move at all? [link] [comments]  |
| Are planets still forming or is the universe at a stage where that process is mostly complete? Posted: 21 Aug 2020 08:47 PM PDT I was just thinking about meteors and how they are still contributing mass to our planet. And is the asteroid belt a planet in the making or is it just leftovers from building the planets in our solar system? [link] [comments]  |
| Posted: 21 Aug 2020 06:02 PM PDT I'm very interested in beneficial reuses of byproducts from industries. The petroleum industry seems to do a fantastic job (like every industry I'm sure they could do better yet) of reusing waste products from a given process and creating very marketable products. What are some of the common process inputs that will dry up or get drastically more expensive for other industries if we aren't cracking as much crude? As a follow up do we have the technology to transition to bio versions of those chemicals? [link] [comments]  |
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