How do they keep patients alive during heart surgery when they switch out the the heart for the new one? |
- How do they keep patients alive during heart surgery when they switch out the the heart for the new one?
- What happens to light after it hits the cone or rod cells in our eyes?
- Could Venus have supported life in the distant past?
- Why do we still use/need SIM cards?
- How did people classify molds before the invention of the microscope? Did they classify them as plants, fungi, or something else?
- Is mammal hair a "descendent/divergence" of feathers?
- What is the mechanism that allow dolphins and whales to stay underwater for such a long time?
- Does the distribution of plastic in our oceans help us learn about ocean movements?
- if hot air goes up, why are the top of mountains cold?
- When people experience head trauma, why are they told NOT to sleep?
- What is the difference between the six types of quarks?
- What limits the size of a cell? (in particular I'm interested how long it takes for enzymes/nutrients etc to travel within a cell to a place they need to be)?
- What population impacts were observed from adding iodine to table salt?
- [also engineering] How do roller coasters maintain the same speeds with so many different loads of people?
- How do we know how many stars are in a galaxy?
- How do charge carriers deliver energy to a circuit element, without a change in their kinetic energy?
| Posted: 08 Jun 2018 09:55 PM PDT |
| What happens to light after it hits the cone or rod cells in our eyes? Posted: 09 Jun 2018 04:59 AM PDT I was wondering if it just someone floats out of the eye, if it's just absorbed, or whatever. If it is absorbed, does that affect the cell itself in anyway? [link] [comments]  |
| Could Venus have supported life in the distant past? Posted: 09 Jun 2018 04:31 AM PDT It's roughly the same size as Earth, and by some estimates it's in the Sun's habitable zone. Could it have supported life, and if so, what happened to make it the way it is today? [link] [comments]  |
| Why do we still use/need SIM cards? Posted: 09 Jun 2018 03:25 AM PDT Why do we still need a physical chip to access mobile network instead of an account?/ is it just because it would mean to modify the structure? int that case wouldn't it still be more convenient to emulate SIM cards with through an IC embedded in the phone? [link] [comments]  |
| Posted: 08 Jun 2018 11:04 PM PDT |
| Is mammal hair a "descendent/divergence" of feathers? Posted: 09 Jun 2018 04:58 AM PDT A strange question I guess. I have been watching a lot of dinosaur documentaries recently (a caveat about the extent of my knowledge), it seems evidence for feathers in dinosaurs is getting pushed back earlier and earlier in the timeline. Is it possible (or even likely) that mammal hair comes from the same source as these early proto-feathers? [link] [comments]  |
| What is the mechanism that allow dolphins and whales to stay underwater for such a long time? Posted: 08 Jun 2018 12:28 PM PDT |
| Does the distribution of plastic in our oceans help us learn about ocean movements? Posted: 08 Jun 2018 12:26 PM PDT Since I'd imagine researchers can't dump things in the ocean to follow en masse, I wondered if the plastic deposits are giving us insight into where things left in certain parts of oceans inevitably end up? [link] [comments]  |
| if hot air goes up, why are the top of mountains cold? Posted: 08 Jun 2018 09:29 AM PDT |
| When people experience head trauma, why are they told NOT to sleep? Posted: 08 Jun 2018 09:42 AM PDT What does sleeping does to the brain that it's not advisable to sleep after a head trauma? [link] [comments]  |
| What is the difference between the six types of quarks? Posted: 08 Jun 2018 09:00 AM PDT I know that there are 6 different types of quarks (up, down, charm, etc.) But what exactly is the difference between them? How was it determined which combinations make up protons, neutrons, and so on? On a side note, are they small enough to be considered on the Planck scale? By throwing h = E in Einstein's E=mc2, m=2.281 x 10-42kg for something with one quantum of energy, so are quarks small enough to be on that scale? (I'm sure I'm not making much sense, but if you get what I'm trying to ask, I'm curious about it) [link] [comments]  |
| Posted: 08 Jun 2018 12:40 PM PDT I googled and read this http://www.ivyroses.com/Biology/Cells/What-limits-cell-size.php, but I was under the impression that cell size was limited because the larger they got, the longer it took to send (for lack of a better word) signals or nutrients from one place to another. Is this not a concern? Is it only a secondary concern? Like, if a cell managed to overcome all the issues in the above link, it would then be primarily limited in size because of this issue? Thanks. [link] [comments]  |
| What population impacts were observed from adding iodine to table salt? Posted: 08 Jun 2018 11:28 AM PDT I found a study referenced in Wikipedia that stated that the wide-scale adoption of iodine into salt resulted in increased IQ among that age cohort. It stated also that: "We also document a large increase in thyroid-related deaths following the countrywide adoption of iodized salt, which affected mostly older individuals in localities with high prevalence of iodine deficiency." I don't have access to the full text. I was curious if there was a proposed causal mechanism for the mortality among older individuals. [link] [comments]  |
| Posted: 08 Jun 2018 10:44 AM PDT Say you're riding a roller coaster with a group of 100 pound kids on a field trip. Then the next time you ride it it's all 200+ pound adults. How do they keep the coaster from hitting turns or inversions with too much speed? How is there a guarantee that you'll clear an airtime hill if everyone on your ride is heavy? I know that there are brake runs and sometimes launched coasters like Top Thrill Dragster or Kingda Ka will have roll backs, but it seems like there should be a lot more variation than there is. [link] [comments]  |
| How do we know how many stars are in a galaxy? Posted: 08 Jun 2018 01:22 PM PDT |
| Posted: 08 Jun 2018 06:31 AM PDT As an amount of charge passes through a circuit element, a drop in potential energy indicates the transfer of electrical energy into the component. It could be converted to heat/light etc. depending on the component. The amount of energy transfer will = drop in potential. I am trying to wrap my head around where the energy actually comes from, given that there is no drop in Kinetic Energy of the charge carriers, since that would cause a differing current density at the output of the component with respect to the input (which is not what happens)? Please help me intuitively see how everything is conserved! [link] [comments]  |
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