How close would you have to get to the sun for the vacuum of space to be at room temperature? |
- How close would you have to get to the sun for the vacuum of space to be at room temperature?
- Hi, are there non-lattice solids? My physics textbook mentions most solids are in a crystal lattice.
- 1000kg of cotton, 1000kg of nails, or both?
- According to quantum physics, electrons can technically be anywhere in the universe, but I learned in my physical science class (8th grade) that in each electron shell of an atom, there is a maximum amount of electrons that it can hold. Don’t these two ideas contradict each other?
- Why doesn't it lightning and thunder during snow storms like it does in rainstorms?
- Is it theoretically possible to melt wood in extremely hot temperatures in the absence of oxygen and an ember?
- In regular blended gasoline with some percentage of butane or other volatile hydrocarbons, why do they not just immediately evaporate from the gasoline once stored in a vented tank?
- Why our sight gets blurry when we are tired?
- How do space suits protects astronauts from space?
- Is the stellar life-cycle of a Pop I star affected by the gravitational absorption of heavy elements in its accretion disk from progenitor Pop II and III stars?
- Is lead only dangerous through physical contact and/or ingestion? Can you also get lead poisoning through proximity?
- existence of a triple point?
- How do ring laser gyroscopes work?
- When the daylight per day is longer, why is more daylight added to the evening hours than the morning hours?
- How does Lamotrigine treat depression if it suppresses the release of both glutamate and aspartate?
- How can life exist if it is essentially a form of ‘Anti-Entropy’ ? Does life’s existence defy the law of entropy in the universe?
- Do all isotopes of elements get a unique name?
- Why isn't the entire ocean illuminated at night?
- If you had a ship that can accelerate forever is it possible to maintain a constant perceived (such as 1G) acceleration for all occupants as you approach the speed of light?
- Are visual inputs in the center of your retina processed and perceived faster than those in your retina's periphery?
- Are there any stable/long lifetime exotic atoms that can conceivably be produced with today's technology?
- Are Life Expectancy Calculation Methods Homogeneous Between Countries, Agencies and Organizations?
| How close would you have to get to the sun for the vacuum of space to be at room temperature? Posted: 25 Feb 2019 04:08 PM PST |
| Hi, are there non-lattice solids? My physics textbook mentions most solids are in a crystal lattice. Posted: 25 Feb 2019 08:16 AM PST |
| 1000kg of cotton, 1000kg of nails, or both? Posted: 26 Feb 2019 03:49 AM PST There are two trucks, 1 truck contains 1000kg of nails and the other 1000kg of cotton assuming that the trucks are identical with both their drivers being the same person(also run in then same speed),and they have the same starting point and end point .if the two trucks have a race on a football field. Which one will come first? So my science teacher asked the whole class this question and all of our class answered that the two trucks would have a tie(since all of their features are identical). To our surprise our teacher answered that the 1000kg of cotton would be the first them the 1000kg of nails would catch up. Our teacher then asked us why would the cotton win, so my classmates made some hypothesis why the cotton would win. Like the truck with the 1000kg nails on which the nails were bouncing up and down the truck then one of the nails went through the engine which caused the truck to explode or one the other truck was made of cotton. His answer to our hypothesis was that it was wrong since we were making assumptions since there were parts that was not in his given question My question is that does the cotton, the nails or both win? (I really have no idea on why the answer is cotton. For me I strongly believe that the answer is both. The teacher even called us "slow" because we could not explain why the cotton would win.)sorry for the bad grammar [link] [comments]  |
| Posted: 25 Feb 2019 10:03 PM PST I watched a few short YouTube videos about quantum physics, and they said that electrons can technically be anywhere, but this contradicts what I learned in class. If the innermost shell, for example, is already full, but electrons can technically be anywhere, could another electron still just ride over into the innermost shell? Does this mean that there are limits to "electrons can be anywhere"? Or do laws of quantum physics just not apply here (I feel like I heard that before)? Forgive me if this is pretty much a stupid question, but I'm uneducated in physics, especially quantum physics, so when I thought about these two concepts and put them together, they didn't make sense. Thanks! [link] [comments]  |
| Why doesn't it lightning and thunder during snow storms like it does in rainstorms? Posted: 25 Feb 2019 05:13 PM PST Is there something drastically different about the clouds producing the precipitation? [link] [comments]  |
| Posted: 25 Feb 2019 09:33 PM PST I've always wondered this and I finally remembered to be able to ask this sub [link] [comments]  |
| Posted: 25 Feb 2019 10:12 PM PST |
| Why our sight gets blurry when we are tired? Posted: 25 Feb 2019 10:09 PM PST When i´m tired, my sight starts to get blurry, and I need to rub my eye with my hand to "clean" it, why is this? [link] [comments]  |
| How do space suits protects astronauts from space? Posted: 25 Feb 2019 09:35 PM PST Is there a limit to how long a person can stay out in space to both hot and cold extremes? [link] [comments]  |
| Posted: 26 Feb 2019 06:25 AM PST Every observable solid gravitational body in the solar system exhibits impact craters, so it would seem obvious that the Sun would be impacted by as much, and probably much more asteroid and comet material than the planets and moons. It seems the absorption of elements heavier than iron would shorten the lifespan of a star. Just wondering if any astrophysicists have modeled this, or even put any thought into it? One could imagine, that if this is true, heavier elements would tend to build up as the universe ages, forming a trend toward denser bodies over time. [link] [comments]  |
| Posted: 25 Feb 2019 09:40 PM PST How would I check a vacuum insulated bottle for lead? Is it just the solder point on the bottom? Or the powder coated paint as well? Would I need to check the inside of the bottle too? What's the best home kit? [link] [comments]  |
| Posted: 25 Feb 2019 08:20 AM PST given that water needs to boil to vapourise and needs to freeze to solidify, how is there a certain set of Pressure and Absolute Temperature at which water (or any other substance) exist as solid, liquid and gas? [link] [comments]  |
| How do ring laser gyroscopes work? Posted: 25 Feb 2019 09:05 PM PST I heard (I think) they were used in an experiment to measure the rotational speed of the Earth. I dunno how though [link] [comments]  |
| Posted: 26 Feb 2019 05:28 AM PST The shortest period of daylight in my area is 7:30 am - 4:30 pm and the longest period of daylight is 5:30 am - 8:30 pm. There's a 2 hour difference in the starting point and a 4 hour difference in the end point. Why is that? [link] [comments]  |
| How does Lamotrigine treat depression if it suppresses the release of both glutamate and aspartate? Posted: 25 Feb 2019 09:51 PM PST I've been trying to understand Lamictal's mechanisms of action for someone with unipolar depression since it's mainly prescribed for bipolar disorder and epilepsy. I have major depressive disorder and general anxiety disorder, however the medication actually decreases GABA levels, which should, in theory, increase anxiety; I've been prescribed gabapentin for anxiety in the past and it was effective. The only information I've found regarding Lamictal's action on depression is that it has some effect on sigma receptor activity. Since the medication is approved by the FDA for bipolar disorder and mania, and is only given off-label for depression, wouldn't Lamictal bring down my mood as well? [link] [comments]  |
| Posted: 25 Feb 2019 10:51 PM PST |
| Do all isotopes of elements get a unique name? Posted: 25 Feb 2019 12:42 PM PST So I was learning about isotopes today, and I learned that the main three stable Hydrogen isotopes all have a unique name: Protium, Deuterium, and Tritium. When I looked at Helium, I noticed that there is Diproton and Helion, but I couldn't find a name for H-4, which is the most stable of the Helium isotopes. Is there a name? Do all of the stable isotopes have a unique name, and where can I see them? [link] [comments]  |
| Why isn't the entire ocean illuminated at night? Posted: 26 Feb 2019 12:41 AM PST On a clear night by the sea, I can visibly see a light source coming down from the moon and illuminating a section of the ocean. This section has a width of maybe 10 meters. Now here's the interesting part, no matter how far I walk across the shore, I am NEVER in-front of that light source. It is always just ahead of me, never changing in width and intensity. Therefore, why isn't the entire ocean illuminated by this light and why is it always just ahead of me. If it is always just ahead of me then in reality the whole ocean should be lit up and there should be no dark parts. I can obviously assume it's a optical illusion, but I'd like to understand the mechanics of what is actually happening. Thanks Login [link] [comments]  |
| Posted: 25 Feb 2019 12:38 PM PST I imagine the energy requirement increases as the Lorenz factor increases, but I'm not sure what the subjective acceleration experience is as one approaches the speed of light. [link] [comments]  |
| Posted: 25 Feb 2019 09:53 PM PST Ok, so perfect example: I'm sitting here in my car looking at my phone, scrolling up and down Reddit. In the upper left corner of my left eye, I can see my phone's reflection in my left front window. Now, I SWEAR TO GOD, I'm seeing the reflection in the corner of my eye happen slightly after the scrolling that I see happening on my phone in the center of my vision. Like maybe a few miliseconds after. Every time I scroll. Now, assuming light speed is too fast to notice this difference, my guess is the time dilation happens in my brain somewhere. I know the fovea is the most sensitive part of vision. But, is it actually so important to survival that the brain processes information in the fovea before it processes information outside the fovea? Meaning, we become consciously aware of phenomena from our fovea before we become aware of phenomena from outside our foveas? So, am I crazy? Or, am I really seeing the same event essentially happen twice in my head due to seeing it from different places in my eye? [link] [comments]  |
| Posted: 25 Feb 2019 08:34 PM PST By "long lifetime" I mean a timescale comprehensible by good ol' human intuition. By "conceivable" I mean within 1ish order of magnitude of current accelerator energies, and involving particles with long enough lifetimes to interact with each other. Like, positronium and positronium compounds have already been identified, but they decay on the scale of nanoseconds. Alternatively: Is there any theoretical obstacle to producing macroscopic collections of exotic atoms, under laboratory conditions? [link] [comments]  |
| Are Life Expectancy Calculation Methods Homogeneous Between Countries, Agencies and Organizations? Posted: 25 Feb 2019 05:50 PM PST Is there some set standard on how to calculate life expectancy for a population? Is it simply some sort of leading average of the age in which people died? Or is it more complicated than that? Where can I find the data sets that are used to calculate life expectancy? I want to better understand death rates and I feel like the only way to do that is to understand how it is calculated first. [link] [comments]  |
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