As a high speed charged particle crosses the event horizon of a black hole, what happens to its magnetic field? |
- As a high speed charged particle crosses the event horizon of a black hole, what happens to its magnetic field?
- What is the matchstick's head made up of ? And how does the chemical reaction proceed in lighting the match ?
- [Astronomy] How busy is a satellite like Hubble? Does it have downtime or is it scheduled 100%?
- The nearest star is a little over 4 light years away. Do we know of any solar systems with neighbors that are very close to each other (relative to our proximity with Proxima Centauri)?
- What exactly makes a standard insulator 'topologically equivalent' to the vacuum?
- Why is the climate of the intermountain west region of America so varied?
- When lightning hits a body of water does it instantly kill the bacteria in the area it hit?
- How are telescopes and space observatories arranged at the L2 Lagrangian point so they do not interfere with each other?
- Why do metabolisms slow down with age?
- Why do astronauts lose bone mass in space?
- How do slushy machines keep the drink in slushy form?
- Is it possible to have an Earth-rise on the moon?
- Suppose we shoot a charged particle down the axis of a solenoid with a magnetic field. It will spiral around the lines of the field, therefore generating its own co-axial magnetic field. Is the new field directed against the solenoid field or along it?
- Why did nuclear tests 'Bluestone' and 'Housatonic' have small fireballs surrounding the main fireballs?
- Why is it that with pixels on a screen the colors red, green, and blue are used rather than the primary red, yellow, and blue?
- Why does the depolarisation of a section of a neurone triggers the depolarisation of the next section?
- Do the jet streams themselves MOVE air masses, or are they just the identifiable boundary between two air masses?
- Why can't we fry stuff in substances like water, as opposed to frying them in oil?
- Does a Body in Rotation Lose Energy Over Time?
- Does a rock being dropped into water make a different sound depending on depth?
- Do astronauts catch colds, or other viruses?
- What determines the brittleness or flexibility of a metal?
- Why can't we see distant stars during the day?
| Posted: 31 Mar 2018 06:09 AM PDT |
| Posted: 31 Mar 2018 06:47 AM PDT |
| [Astronomy] How busy is a satellite like Hubble? Does it have downtime or is it scheduled 100%? Posted: 30 Mar 2018 01:34 PM PDT Curious how telescopes are utilized and at what capacity, is there downtime or is it constantly being used? Sorry in advance if the formatting is wrong, im on Alien Blue and have no idea how to categorize. [link] [comments]  |
| Posted: 30 Mar 2018 04:38 PM PDT |
| What exactly makes a standard insulator 'topologically equivalent' to the vacuum? Posted: 30 Mar 2018 11:36 PM PDT I've been trying to better understand topological insulators, and one thing that I really struggle with is the idea that a standard insulator is topologically equivalent to the vacuum. Here is my understanding so far: 2 states are topologically equivalent if we can imagine changing the Hamiltonian from one into the other without removing the band gap. If we consider the Hamiltonian H_k1 of an insulator, there is a way in which we can change the periodic potential from the atoms in the crystal to smoothly transform it into any other insulating H_k2. So for example to change from diamond to Si we could simply space the atoms further apart, and change the potential from each atom. I think that makes sense. In terms of changing it to the vacuum, does this correspond to removing the periodic potential entirely? Because it's my understanding that the band gap arises because of the periodic potential, so removing it would destroy the band gap, meaning we no longer have a topologically equivalent phase. All I have been able to find online are some hand-wavy explanations about Dirac calling the vacuum an insulator, but I'm interested in what we actually change about the Hamiltonian to arrive at the vacuum from an insulating state. [link] [comments]  |
| Why is the climate of the intermountain west region of America so varied? Posted: 31 Mar 2018 01:38 AM PDT If you look at a Köppen climate classification map of the world you'll see that it's mostly constant with large swaths of land and rarely begins to vary. An example of the map having lots of variation within a small concentration I've noticed is in the intermountain west (where I live). I kind of wonder why. I do have one idea. Based upon my fairly standard education of geography my hypothesis would incorporate two things that would cause the intermountain west to have a varied climate.
Is my assumption correct or is there way more to it than I know? Thoughts please. [link] [comments]  |
| When lightning hits a body of water does it instantly kill the bacteria in the area it hit? Posted: 30 Mar 2018 01:14 PM PDT |
| Posted: 30 Mar 2018 03:57 PM PDT |
| Why do metabolisms slow down with age? Posted: 30 Mar 2018 08:47 PM PDT Why could I eat whatever the hell I wanted until 30, and now I have to be selective? [link] [comments]  |
| Why do astronauts lose bone mass in space? Posted: 30 Mar 2018 05:32 PM PDT |
| How do slushy machines keep the drink in slushy form? Posted: 30 Mar 2018 01:00 PM PDT |
| Is it possible to have an Earth-rise on the moon? Posted: 30 Mar 2018 04:05 PM PDT If you were to stand on the moon, would you be able to witness the the Earth "rise" on the horizon? [link] [comments]  |
| Posted: 30 Mar 2018 12:42 PM PDT |
| Posted: 30 Mar 2018 07:22 PM PDT Here are the links to what im seeing... 'https://www.youtube.com/watch?v=GLP5EJkCZiQ&ab_channel=SmithWesson' and 'https://www.youtube.com/watch?v=L_jFQw78uzo&ab_channel=LawrenceLivermoreNationalLaboratory' See the small fire balls that surround the main fire ball? Why is that happening ? Second side question is why does it seem that Housatonic last so long? [link] [comments]  |
| Posted: 30 Mar 2018 05:31 PM PDT |
| Posted: 30 Mar 2018 09:55 PM PDT |
| Posted: 30 Mar 2018 10:55 PM PDT I've tried looking this up everywhere and I've gotten nothing but the same explanation over and over again. No one can actually tell me if jet streams are just an INDICATOR of a boundary between two different air masses, or if they actually push air masses around. [link] [comments]  |
| Why can't we fry stuff in substances like water, as opposed to frying them in oil? Posted: 30 Mar 2018 09:06 PM PDT Are there a class of substances which cannot be used to fry? How are these different from oils in this context? [link] [comments]  |
| Does a Body in Rotation Lose Energy Over Time? Posted: 30 Mar 2018 06:43 PM PDT So, as is common knowledge from Newton's first law: a body in motion tends to stay in motion until acted upon by an external force. Something that is moving in a linear path continues along a linear path due to inertia until an external force causes it to change in direction or speed (velocity). One thing that has always made me wonder is does a rotating object lose energy over time because of the non-linear motion of its constituent matter? Particles in a rotating mass are constantly changing direction. Changing direction makes me think changing velocity, makes me think changing momentum... I want to think not, because the planets have been rotating for billions of years, but they also have huge moments of inertia due to their immense size and mass. So I don't think that's the entire picture. I am going to finish my BS in mechanical engineering here in about five weeks, and it's been something that I've always thought about from my first physics classes, through dynamics and on. So with that, I'm looking forward to whatever responses and discussion you guys and gals put up! [link] [comments]  |
| Does a rock being dropped into water make a different sound depending on depth? Posted: 30 Mar 2018 08:48 PM PDT Will a rock dropping into 1 foot depth of water sound different than 4 feet and different at 10? Let's say the rock is 10 inches by 4 inches by 4 inches. [link] [comments]  |
| Do astronauts catch colds, or other viruses? Posted: 30 Mar 2018 05:21 PM PDT Do astronauts catch colds? Or is it incredibly sterile in space, keeping them mostly healthy? [link] [comments]  |
| What determines the brittleness or flexibility of a metal? Posted: 30 Mar 2018 06:08 PM PDT Why is steel able to bend and return to its previous shape unlike cast iron? [link] [comments]  |
| Why can't we see distant stars during the day? Posted: 31 Mar 2018 02:46 AM PDT |
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