How do we know how far away the planets are from the sun? |
- How do we know how far away the planets are from the sun?
- Did they have to bring the air up to the international space station?
- What were the long term environmental effects of the burning oil fields in Kuwait?
- After DNA replication, what prevents the newly replicated daughter DNA strands from being replicated once again?
- Do bugs take fall damage?
- Is it necessary for a developing fetus to have the same blood type as its mother?
- Do "new" stars appear in the sky as the light from distant stars reaches us?
- How are extremely low temperatures measured?
- Do people living in hot climates have less issues with high blood pressure due to salt lost in sweating?
- Can solar systems gain escape velocity from a galaxy?
- Can (How can) vaccinated individuals get (insert disease here) from unvaccinated individuals?
- What was the genealogical/demographical impact of people killed as a result of WW2?
- Why doesn't the phase velocity of light carry useful information?
- What causes earthquakes that are nowhere near a tectonic plate boundary?
- Why is ice less dense than liquid water?
- How far do supernovas expand?
- What is the difference between quantum entanglement and a classical analogon? (see description)
- What is the maximum temperature we as humans were able to measure anywhere in universe?
- How and why does the curvature of a lens affect light?
- Does the regularity of a person’s diet have an impact on their gut biome?
| How do we know how far away the planets are from the sun? Posted: 09 Feb 2019 06:05 AM PST I know that distances can be measured by laser but only if it gets reflected on the object, so that wouldnt work quite well I guess? How do we find out the exact distance between planets and the sun or other astronomical objects without sending a probe that is kept track of? I cant think of any other method to measure such long distances and when I asked my father about it he didnt really know either, he just said that it could maybe be derived by the planets weight and how fast it moves, but how do we know the weight? (I am sorry for my lack of english skills and hope that this isnt a dumb and silly question) [link] [comments]  |
| Did they have to bring the air up to the international space station? Posted: 08 Feb 2019 04:43 PM PST how did they get the air to the international space station? [link] [comments]  |
| What were the long term environmental effects of the burning oil fields in Kuwait? Posted: 08 Feb 2019 06:09 PM PST I heard 5,000,000 gallons a day burned, spewing toxic fumes and soot into the environment. Not to mention the oil on the surface seeping into the ground. What are the effects of that disastrous situation? [link] [comments]  |
| Posted: 08 Feb 2019 05:06 PM PST My best guess is that there is a marker or signal protein that tells the difference between old and new DNA strands, however a Google search doesn't bring up anything nor does my Biology teacher know. [link] [comments]  |
| Posted: 08 Feb 2019 08:49 AM PST |
| Is it necessary for a developing fetus to have the same blood type as its mother? Posted: 08 Feb 2019 03:34 PM PST I know that blood circulation meets between the mother and fetus in the placenta. Since having a different blood type introduced into a person's system can sometimes induce hemolysis, does that mean a mother and child must share a blood type to avoid potentially fatal conditions? [link] [comments]  |
| Do "new" stars appear in the sky as the light from distant stars reaches us? Posted: 08 Feb 2019 05:27 PM PST Basically was just wondering if there are more stars visible in the sky than there were say a billion years ago, or if maybe the expansion of the universe and the increasing distance between stars counteracts the light traveling towards us so that stars whose light hasn't reached us yet won't actually reach us, or... Yeah. And if "new" stars are "appearing" in the sky, would the night sky eventually be extremely bright as the amount of space in which no stars are visible gets less and less? I don't know very much about cosmology, but am currently learning as much as I can about it, and was just curious about this. Thanks. [link] [comments]  |
| How are extremely low temperatures measured? Posted: 08 Feb 2019 06:20 PM PST Such as when MIT cooled molecules in a gas of sodium potassium to a temperature of 500nK. Non-contact measurements systems like lasers would impart heat, so what is used? [link] [comments]  |
| Posted: 08 Feb 2019 05:46 PM PST NaCl has a major role in raising blood pressure, so i figured that losing it constantly in sweating could bring some benefits, but i could not find any paper on the topic. [link] [comments]  |
| Can solar systems gain escape velocity from a galaxy? Posted: 08 Feb 2019 02:28 PM PST For example....during a galactic collision, can outer fringe star systems be accelerated and flung out into intergalactic space/aimlessly roam until they find a new host galaxy? [link] [comments]  |
| Can (How can) vaccinated individuals get (insert disease here) from unvaccinated individuals? Posted: 08 Feb 2019 12:01 PM PST I hear a lot about how dangerous it is for people to leave their children unvaccinated. There have also been cases of measles outbreak, but from what I understand, not only the unvaccinated but also the vaccinated children get it. How? Haven't they been immunized to the disease? Or am I missing something? [link] [comments]  |
| What was the genealogical/demographical impact of people killed as a result of WW2? Posted: 08 Feb 2019 05:21 PM PST A glance on Wikipedia shows that it's estimated up to 85 million people died as a result of the global conflict. Are there changes in the global population, or specific groups, that can be attributed to the sudden (in generational terms) loss of than many people? I'm sure the Holocaust had a significant impact, what else has been learned about this? [link] [comments]  |
| Why doesn't the phase velocity of light carry useful information? Posted: 08 Feb 2019 10:55 AM PST I've been looking around the internet and can't find a satisfactory answer. I was thinking about how dielectrics slow down the group velocity of light, but not the phase velocity, and then wondering if that would violate causality in some way. Apparently, the reason why it doesn't violate causality is because a pure sine wave doesn't carry any useful information because all it gives is a frequency. In the context of practical uses, it may not be very useful since there's no information about phase or amplitude, but in the context of photons however, it seems like there's enough information to know a lot. You know the energy using Planck's relationship E=hf, and you know the wavelength by the relationship c=lambdaf. What's missing? [link] [comments]  |
| What causes earthquakes that are nowhere near a tectonic plate boundary? Posted: 08 Feb 2019 09:13 AM PST I live in Sudbury, Ontario and in the last two days we have had two relatively small earthquakes. 1 2 Could these be related to mining activity in the area? [link] [comments]  |
| Why is ice less dense than liquid water? Posted: 08 Feb 2019 07:27 PM PST |
| Posted: 08 Feb 2019 11:50 AM PST |
| What is the difference between quantum entanglement and a classical analogon? (see description) Posted: 08 Feb 2019 12:59 PM PST Let's say we generate a pair of entangled photons and measure the state of one of the photons. It is often said that the other photon then immedietaly takes the opposite state, which is the "spooky action" that Einstein described. Now lets say I have two classical objects, one white and one black and throw them blindly in opposite directions. I don't know which object I threw where but if I find one of the objects and see its color I immediately know the color of the other object. Where is the difference to quantum entanglement? Why is quantum entanglement so spooky? Is it just in the maths or is there some way to describe it visually? [link] [comments]  |
| What is the maximum temperature we as humans were able to measure anywhere in universe? Posted: 08 Feb 2019 08:10 AM PST |
| How and why does the curvature of a lens affect light? Posted: 08 Feb 2019 08:51 AM PST |
| Does the regularity of a person’s diet have an impact on their gut biome? Posted: 08 Feb 2019 05:28 PM PST For example, are there any correlations between people that eat diverse meals and a more diverse biome? If so, is this correlated with a healthier gut? [link] [comments]  |
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