Why don't single engine planes roll in the opposite direction the propellor is turning, similar to helicopters with no tail rotor? |
- Why don't single engine planes roll in the opposite direction the propellor is turning, similar to helicopters with no tail rotor?
- How does a laptop computer display advertisements on a social media site, which are products searched for on a mobile phone, that does not have any email or social media accounts active on it?
- How do bats and other creatures that hang upside down for prolonged periods not risk their blood rushing to their heads?
- Do Weddell seals echolocate?
- Is there still any category-1 SNM at the Chernobyl sight, or has it been completely cleaned up? It would seem rather dangerous to open the plant as a tourist attraction with something so dangerous just lying there.
- Why is it that the deepest parts of the ocean can get down to -2 degrees Celsius, without freezing at 0 Celsius?
- Is it possible to measure the change in concentration of a reaction from a change in temperature of the reaction?
- How is it possible for a nuclear power plant's capacity factor to be over 100%?
- What exactly is this property that things have called 'momentum'?
- Is there a specific number of equal-length pendulums that produces the most "chaotic" behavior when linked together (e.g., a triple pendulum)? How would the chaos be compared?
- Does a tectonic plate only move in one direction at a time, or can parts of it move in different directions simultaneously? Wouldn't this break them down into smaller plates?
- How long does an atmosphere usually take to develop?
- Why do things only burn in high atmosphere?
- Why do some galaxies form spirals?
- What is the “spin” of an electron?
- Can somebody explain to me how a Penrose diagram works?
- What is the weather like in other planets? Do they have storms and tornadoes like we do? Do they have equivalents?
| Posted: 26 Oct 2018 10:36 AM PDT A helicopter requires a tail rotor because otherwise it would spin in the opposite direction. How do single engine planes cope with that problem? I'm asking specifically about single engine planes because the mechanics of 2+ engines are different, as the engines aren't located at the roll axis of the plane but instead, they're on the wings. [link] [comments]  |
| Posted: 27 Oct 2018 12:34 AM PDT yesterday i was in front of the television and i did a search on my phone for a white dressing table - i have just logged onto my computer and a social media site has the exact same dressing tables as i was looking at yesterday- my phone doesn't have any social media or emails on it - how does this happen? [link] [comments]  |
| Posted: 26 Oct 2018 11:29 AM PDT |
| Posted: 26 Oct 2018 10:07 PM PDT Weddell Seals make eerie, otherworldly vocalizations when underwater (and above). It sounds very purposeful, but it's unclear whether they're making these noises for the sake of navigation, or if they're simply communicating with other seals. I'm finding a lot of contradictory information in my searches. Are there any seal biologists who could help me out? [link] [comments]  |
| Posted: 26 Oct 2018 05:03 PM PDT |
| Posted: 26 Oct 2018 09:55 AM PDT |
| Posted: 26 Oct 2018 09:42 AM PDT I have a neutralization reaction of 10mL 1M HCl and 10mL 1M NaOH, and I measured the temperature of the solution and the reaction. I have the initial change in temperature at ∆1.6˚C/s. Is it possible to convert the change in temperature of reaction to a change in the concentration of a reaction? If so, how? [link] [comments]  |
| How is it possible for a nuclear power plant's capacity factor to be over 100%? Posted: 26 Oct 2018 11:05 AM PDT I am sifting through the USNRC's dataset on power reactors, and I noticed that in 2017 some reactors (Surry Power Station Unit 1, Oyster Creek Nuclear Generating Station,Nine Mile Point Nuclear Station Unit 2, Donald C. Cook Nuclear Plant Unit 2) had capacity factors in the range of 101-113%. is this a data error or is there some way to explain this? I am not a nuclear engineer, just a budding data analyst. [link] [comments]  |
| What exactly is this property that things have called 'momentum'? Posted: 26 Oct 2018 06:02 AM PDT When I started studying classical mechanics, momentum was mass x velocity. Later I learned that Newton's second law was actually expressed as force being proportional to the the rate of change of momentum, which mathematically I'm happy with if you accept as momentum = mv. This is especially true when I also learned that term impulse is the change in momentum and again thinking in classical terms I can see that something that is massive and travelling fast has greater energy than something less massive or slower - hence impulse is larger or smaller in collisions. However when I read about the quantum world momentum seems to be a much more basic attribute that either mass or velocity. So:
edit. looking at the the classical energy equation 1/2 mv2 - this is an integration of mv, This makes me think that perhaps momentum is perhaps a component of energy? Is this just nonsense? [link] [comments]  |
| Posted: 26 Oct 2018 05:04 PM PDT I noticed that adding more pendulums to a system makes it look more chaotic (I'm not sure how to measure that), but at some point, the behavior of the entire system seems less chaotic in terms of the overall shape of the chain. I looked up this 100-pendulum video, and it looks like larger numbers of pendulums exhibit behavior that is closer to that of a string let loose without any resistance. However, this is also just for one starting state. For lack of better words to describe this, is there a way to describe how chaotic a dynamic system is, and if it can be used to compare different n-pendulum systems? [link] [comments]  |
| Posted: 26 Oct 2018 10:22 AM PDT This image on Wikipedia is confusing, since it seems that different sides of a plate can move in different directions. Can someone explain this? https://en.wikipedia.org/wiki/Plate_tectonics#/media/File:Plates_tect2_en.svg [link] [comments]  |
| How long does an atmosphere usually take to develop? Posted: 26 Oct 2018 10:18 AM PDT For the sake of creative writing: If all the planets in the galaxy suddenly lost their atmospheres, how long would it take for them to form again? I would imagine that volcanic, active planets would develop atmospheres faster than quiet, cooler planets due to all the gasses they expell. Is there a range of time I could use? Bonus question: What would it look like to be on earth with no atmosphere? I imagine the sky wouldn't be so blue, but would you see the stars? Would they get drowned out by the sun? [link] [comments]  |
| Why do things only burn in high atmosphere? Posted: 26 Oct 2018 11:32 AM PDT You see things like rockets and meteorites with burning trails when they first enter the atmosphere but not when they get lower. I get that it's the friction but wouldn't there be less friction that high up with the atmosphere being less dense? [link] [comments]  |
| Why do some galaxies form spirals? Posted: 26 Oct 2018 04:45 AM PDT |
| What is the “spin” of an electron? Posted: 26 Oct 2018 03:01 AM PDT First of all, I have absolutely no education in quantum physics whatsoever. I imagine the spin of an electron like a planet rotating on its axis, if the orbital is complete, one electron clockwise and the other anti clockwise. The problem with this reasoning is that it only work with a 2 dimensional orbit, if we think of electrons like small balls rotating, for example in a sphere/ orbital s then there is not a clockwise and anti clockwise. [link] [comments]  |
| Can somebody explain to me how a Penrose diagram works? Posted: 26 Oct 2018 09:23 AM PDT Wikipedia is only confusing me more on this. All I can get is that it's used to explain the relationship between space and time, and is drawn in such a way as to make each axes represent infinite space/time. [link] [comments]  |
| Posted: 26 Oct 2018 08:51 AM PDT |
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