How far away are asteroids from each other? |
- How far away are asteroids from each other?
- Does the permeability of balloons increase with mechanical stress?
- Why is Mississippi so hilly?
- Does a mountain's mass affect the gravity on top of it?
- What is the octane number mean for petrol?
- What kind of current is lightning? AC or DC?
- Why do your arms feel sore after getting a vaccine ?
- Can you use a step up transformer in series to create increasingly stronger magnetic fields?
- Can you increase the volumetric flow rate of a river?
- How do we know how many calories something has?
- Does tides also happen in rivers and lakes like they do in the ocean?
- Why does a hurricane weaken so rapidly on land?
- Why is color of the sky affected lot more severely by time of day (longitudinal angle differences) compared to how close you are to the equator/NS poles (latitudinal angle differences)?
- Resonance - How do you determine how many of one atom can better stabilize a charge than a more electronegative atom?
| How far away are asteroids from each other? Posted: 13 Jul 2019 01:53 AM PDT If I were standing (or clinging to, assuming the gravity is very low) on an asteroid in the asteroid belt, could I see other ones orbiting near me? Would I be able to jump to another one? Could we link a bunch together to make a sort of synthetic planet? Also I'm never sure what flair to use. Forgive me if this is the wrong one. [link] [comments]  |
| Does the permeability of balloons increase with mechanical stress? Posted: 13 Jul 2019 03:01 AM PDT Aka does a ballon stays inflated less long after reuse? Talking about the type of ballons you use with kids. (Made of latex?) I know that latex, rubber and plastics have different permeability for different gases, but I am not sure whether this permeability can be affected mechanically. If so, the common stretching of the uninflated ballon before first use might result in it holding less air. [link] [comments]  |
| Posted: 12 Jul 2019 01:29 PM PDT So I live in South Mississippi and I'm a dork who gets really excited by how pretty everything is here, and yet I never noticed until taking an overpass one day that our state is really hilly. I've hiked and experienced the hills but it never clicked until I saw the rolling canopy of pine trees one day. Then I started paying attention to the way the highway just seems cut through some hills and just go up and down others. I also notice a lot of hills where a stream isn't immediately nearby. What causes that? I'm sorry for the poorly structured question, I'm just tired of googling "why is Mississippi so hilly" with no answer. [link] [comments]  |
| Does a mountain's mass affect the gravity on top of it? Posted: 13 Jul 2019 04:45 AM PDT On top of a mountain, a mass would be further from Earth, thus having a smaller gravitational pull, but at the same time it would also have the pull from the mountain, how would this affect the total weight a mass experiences? [link] [comments]  |
| What is the octane number mean for petrol? Posted: 13 Jul 2019 02:24 AM PDT |
| What kind of current is lightning? AC or DC? Posted: 12 Jul 2019 10:07 AM PDT |
| Why do your arms feel sore after getting a vaccine ? Posted: 12 Jul 2019 04:52 PM PDT Just got caught up on my vaccines and my arms are feeling like I worked out. Does it have to do with the needle itself or the way you're body processes it ? [link] [comments]  |
| Can you use a step up transformer in series to create increasingly stronger magnetic fields? Posted: 12 Jul 2019 01:24 PM PDT So, I am writing a bit of sci-fi, (I know, roll your eyes) and I want to include a Coilgun as part of the story that I am presenting. The idea I had was the gun was operated by a series of step up transformers, you induce a small amount of voltage to the first coil, and use some form of lever to catapult the projectile forward. Once the round reaches the field's center, the field is collapsed, and the secondary coil is charged with a much stronger voltage (like in an ignition coil on a vehicle.) That charge goes to the second stage transformer, which creates a much stronger magnetic field (in theory) which then collapses, increasing once again the amount of voltage in the system. Theoretically this could occur as many times as one wants, until the round is as fast as one desires for the effect. The voltage is then stored in capacitors after the firing sequence, and discharged for other uses. I have no idea at all if this could work, but if it could that would be a good thing to include in the book, it would make the gun more efficient because it would not need as much initial power for operation. [link] [comments]  |
| Can you increase the volumetric flow rate of a river? Posted: 12 Jul 2019 05:27 PM PDT With the Barry over NO right now, and the concern of flooding, would it be possible or even reasonable to construct a way to increase the volumetric flow rate at the mouth of the river (or any) with large pumps/ducts/leveys? If you could, would you be able to increase flow rate ahead of a storm like this to mitigate any additional rainfall? What technical/ecological changes would there be do something like this? [link] [comments]  |
| How do we know how many calories something has? Posted: 12 Jul 2019 10:59 AM PDT I've always just trusted the labels of foods for how many calories are in them but never really question where those number came from. How do we measure calories? [link] [comments]  |
| Does tides also happen in rivers and lakes like they do in the ocean? Posted: 12 Jul 2019 11:33 AM PDT |
| Why does a hurricane weaken so rapidly on land? Posted: 12 Jul 2019 04:12 PM PDT Storms pop up and strengthen over land all the time. Moment a hurricane comes on land though, seems to never go much farther than 200-300 miles before being just another heavy storm. [link] [comments]  |
| Posted: 12 Jul 2019 08:54 AM PDT I have created figures to better explain my question. My understanding of why the sky turns red during sunrise/sunset is as shown in Figures 1, 2 and 3. During sunrise and sunset (Figures 1 and 3), sunlight has to travel far through the atmosphere due to its angle relative to Earth's surface. As sunlight travels through the atmosphere, it hits molecules and scatter, losing blue light in the process - sky is red. During midday, distance sunlight travels is lot shorter, it retains its blue light - sky is blue. However, if the longitudinal angle differences (time of day) and its affect on distances sunlight travel through the atmosphere ('atmospheric thickness') is the only reason why sky turns red during sunrise and sunset, why doesn't latitudinal angle differences affect the color in the same way? Consider Figures 4 through 8 are at a constant longitudinal angle (same time of day). The northern hemisphere (lets say northern Europe) and the equator (lets say central Africa) are located on same longitude (i.e. their time zones are the same). During summer (Figures 4 and 5), northern Europe is not located at a latitudinal severe enough to affect distance of atmosphere sunlight has to travel - color of the sky is only affected by time of day. However during winter (Figure 6), sunlight has to travel the through same 'thickness' of atmosphere that it travels during sunset (Figure 3). Therefore, during winter, the specific part of northern Europe I marked in Figures 6 and 8 should see the red sky, all day. And if two people are to take a picture in northern Europe and central Africa at the same time, the sky should be colored red and blue, respectively. But from my understanding, this is not the case. Earth is (almost) a sphere so any affect longitudinal angles have on 'atmospheric thickness' should be (almost) the same for latitudinal angles. I was thinking that maybe I could answer myself if I can picture everything in 3D, instead of just 2D as shown in my Figures. So longitudinal and latitudinal angles must be combined to create 'atmospheric thickness' severe enough have drastic changes in color. However, this is clearly not the case since latitudinal angles have little to no impact on longitudinal angles with respect to the color of the sky. If its time of sunrise, midday, or sunset, the colors will be same for northern Europe and central Africa. Sure, duration of the day are different, but the color of the sky will still be red during sunrise/sunset and blue when its midday for both places. If I could freeze time at 12 pm, and look up to the sky at central Africa, the sky will be blue. If I travel north (time still frozen), I should be seeing the sun 'setting' to the south, where one point it will be near the horizon and the sky should be red, even when its 12 pm. And at this location, the sky should be red all the time, as long as the sun is up, at certain time of the year (winter for northern Europe). I've heard of midnight sun and extremely short/long day and night time but never a place that experience red sky for a whole day, maybe I'm just ignorant on that regards. Sorry for the long post, just thought I had to explain the question clearly because when I asked my friends who major in astronomy and photonics, we wasted lots of time because they didn't fully get what I was asking. [link] [comments]  |
| Posted: 12 Jul 2019 08:07 PM PDT Why is it that it is more stable for a negative charge to be spread over 2 oxygens than one oxygen and 3 carbon atoms? Following that logic, why is it more stable to spread a negative charge over 3 oxygen atoms than over 1 oxygen atom and one nitrogen atom? Is it because the difference in electronegativity is much greater between the oxygen and carbon than it is between the oxygen and nitrogen? Just to extend this idea, at what point does a hybrid carbon atom stabilize charge better than a more electronegative atom? For example, according to my textbook, an sp-hybrid C atom stabilizes negative charge better than a nitrogen atom. At what point does hybridization s effect overcome electronegativity? [link] [comments]  |
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