What is the science behind “skin tags”? Why do we get them and how come they tend to grow back when they’re removed? |
- What is the science behind “skin tags”? Why do we get them and how come they tend to grow back when they’re removed?
- If you are in water right underneath the moon and the moon is at it's closest, do you float better than other places on earth?
- If an organ is removed from the body (e.g. the thyroid), are specific hormones (e.g TSH) still released, or does their production cease?
- Can someone explain what simple diffusion is and how it is different from facilitated diffusion? Also is passive diffusion just another term for simple diffusion?
- How do chargeable battery-powered devices handle grounding?
- What's the reference value for the coefficient of restitution in soccer balls and how is determined? Are there official values for balls used in games and how do they know if a ball is in accordance with the parameters?
- How do we know know which way is up in space?
- Why do water molecules only align with the magnetic poles of radio waves? Why not other EM waves?
- Why do we fossil records of sharks if their skeletons are mostly cartilage?
- If we were to compare the size of humans to the sun, would that be like an atom to the earth? Can we have a simplified scale?
- During it's relatively early years Day's on Earth used to rotate much faster. Which force caused the rotation to slow down to what it is today?
- Why do some people regularly experience vivid, outlandish dreams and others rarely dream or dream day-to-day occurances?
- Why is nitrogen willing to give an electron?
- How did the deer, moose, elk, caribou and reindeer of the family Cervidae, develop cranial appendages(antler) throughout history?
- Are there any animals, other than humans with crawling and walking, that have to learn their primary mode of locomotion rather than it be instinctive?
- When it comes to MPB (Male Pattern Baldness) how come men only seem to bald at the front of their heads, or their crown area? Why not on the sides or near the neck region?
- What exactly is happening in the body when the nutritional value of food (minerals/vitamins) is being absorbed and utilized?
- Human Embryo: Where does the ectoderm come from?
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| How do chargeable battery-powered devices handle grounding? Posted: 02 Feb 2020 04:06 PM PST Imagine something like a laptop or cell phone. When it's not plugged into anything, just operating on battery power, it has some ground potential. Now imagine you plug it into a charger, which has a ground potential defined by the wall outlet. As far as I can see, there's no reason why these two ground potentials have to be the same. How does the hardware handle a changing ground potential? [link] [comments]  |
| Posted: 03 Feb 2020 01:05 AM PST |
| How do we know know which way is up in space? Posted: 03 Feb 2020 12:59 AM PST We talk about the earth rotating counter clock wise and have our map of how the earth sits in space but how do we know we are looking from the right angle? Or is it just purely based on north/south? This is assuming a flat universe. [link] [comments]  |
| Why do water molecules only align with the magnetic poles of radio waves? Why not other EM waves? Posted: 03 Feb 2020 12:22 AM PST |
| Why do we fossil records of sharks if their skeletons are mostly cartilage? Posted: 02 Feb 2020 06:25 PM PST Are the conditions for preserving an ancient shark skeleton the same as for other prehistoric species? [link] [comments]  |
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| Why is nitrogen willing to give an electron? Posted: 02 Feb 2020 05:48 AM PST For instance why is it willing to make NH4+ I don't see how an incomplete p2 orbital would give it more stability. [link] [comments]  |
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| Posted: 02 Feb 2020 01:59 AM PST What is the process called? How are these nutrients uniquely and specifically utilized? [link] [comments]  |
| Human Embryo: Where does the ectoderm come from? Posted: 02 Feb 2020 04:33 AM PST Hello. I'm currently studying the development of the human embryo, going from the zygote -> morula -> blastula -> gastrula -> neurula. When I was studying the blastula from human embryos, I learned about its three mains components: 1- blastocele: full of liquid (where does this liquid come from, btw?) 2- trophoblasts: outer layers of cells, which will go on to form the placenta and other uterus/embryo structures (will not be a part of the baby's body) 3- embryoblasts: group of cells within the blastula that will go on to become the baby itself (organs, tissues, ...) All blastula -> gastrula picture that I've seen, show the invagination of the blastula to become the gastrula, and, from these pictures, it always seems like the trophoblasts become the ectoderm, which I know is not true (because the trophoblast will only form embryo/uterus structures). So, where does the ectoderm actually come from? it must be from the embryoblasts right? And why do all pictures on the web/textbooks make it look like it comes from the trophoblasts? Thank you! [link] [comments]  |
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