Are we just “lucky” that Magnetic North is very close to True North, or is there something more behind the reason? |
- Are we just “lucky” that Magnetic North is very close to True North, or is there something more behind the reason?
- Why doesn’t the LHC use an extra electric field to curve its beams instead of relying on magnets and the Lorentz force? Wouldn’t it be possible to have another electric field coming from the “sides”?
- How is it that voltage lags current in a capacitive AC circuit?
- What direction do hurricanes spin in the equator?
- Can any theoretical physicist help me understand what Ed Witten's "hat and ball" diagram is all about in this String Theory lecture?
- With a powerful telescope, is it possible to see the 'outline' of certain stars? Or are they all simply too far away for them to appear as anything else other than a point of light no matter the magnification?
- Is there a “Goldilocks Zone” on a galactic scale?
- Being that neutrinos are so hard to detect, how can we make accurate estimates about how many are produced?
- Why can’t we just use the natural flow of rivers to generate electricity without dams?
- How did viruses evolve if plasmids can't reproduce?
- How good works shielding from solar radiation by being at planetary L2 lagrange points?
- How do birds grow feathers?
- Is there a process for calculating the size of a tsunami? Are the height and length relative to each other?
- Does dark matter and dark energy also exist on Earth or only in space?
- How do strong nuclear forces create mass?
- Is CBD oil effective at treating anxiety/depression?
- Why does the LHC need to pre-accelerate particles?
- Why do high performance cars get worse gas mileage than economy cars?
- Can protactinium be removed from a LFTR without shutting off the reactor? If so, how?
- Would a test for toxoplasmosis detect an infection that occurred 10 years ago?
- When Graphene is used in practical applications, it’s obviously not still 1 atom thick. So how is Graphene different than Graphite?
- Japanese banana with edible skin claims to have reactivated ‚ice-age genes‘ by freezing the seedling using a ‚frost-thaw-awakening‘ method. How does that work?
- Why do certain foods, notably meats and cheeses, taste differently depending on how finely they're cut or shredded?
| Posted: 05 Feb 2019 05:18 AM PST |
| Posted: 04 Feb 2019 10:29 AM PST |
| How is it that voltage lags current in a capacitive AC circuit? Posted: 05 Feb 2019 04:13 AM PST I thought that voltage is the force that "compelled" current to flow, so how could it be that current can flow "ahead" of voltage? [link] [comments]  |
| What direction do hurricanes spin in the equator? Posted: 05 Feb 2019 03:25 AM PST |
| Posted: 05 Feb 2019 07:13 AM PST See this lecture: https://www.youtube.com/watch?v=UKehm-o8snU. There is a fascinating (but exotic!) diagram on page 45 of the slides here: http://wwwth.mpp.mpg.de/members/strings/strings2012/strings_files/program/Talks/Saturday/Witten.pdf. (Note: Witten mentions in the lecture that the hat's lip ought to have been drawn smaller, since the whole point is that an explanation is being sought for WHY the lip is so small, and hence why gravity is such a weak force.) The point is that this is a fascinating/exotic diagram, but I have zero clue what it means or what it is all about. I am intrigued. [link] [comments]  |
| Posted: 04 Feb 2019 01:30 PM PST And if it turns out that it is possible, please share a picture or two! [link] [comments]  |
| Is there a “Goldilocks Zone” on a galactic scale? Posted: 05 Feb 2019 03:31 AM PST Hypothetically, could humans or other life survive near the dense center of our galaxy or on an earth-like planet orbiting a solitary star not in a galaxy? Edit: Sorry if I'm using the term "Goldilocks Zone" rather loosely, I'm just curious if a stars location would have any impact on the habitability of an earth-like planet orbiting it. [link] [comments]  |
| Posted: 05 Feb 2019 01:14 AM PST We've all heard the stats like: 20 trillion neutrinos from the Sun pass through your body every second. Or however many. Given that they interact with matter so little, and are so hard to detect, how can we make accurate estimates about how many are being produced? Is it purely down to math, e.g. theories predict that we'd expect X number of interactions in Y detector if Z neutrinos are produced, and the detection rate matches that? Or is it some other method? Appreciate any answers! [link] [comments]  |
| Why can’t we just use the natural flow of rivers to generate electricity without dams? Posted: 04 Feb 2019 09:33 PM PST Why don't we basically use water wheels or underwater pinwheels to generate electricity without trapping the water? [link] [comments]  |
| How did viruses evolve if plasmids can't reproduce? Posted: 05 Feb 2019 01:44 AM PST First of all let me say this is a legitimate question and I'm not trying to disprove evolution; that being said I've heard a hypothesis that viruses came from DNA or RNA that evolved from escaped plasmids and transposons. What I want to know is: How did plasmids and transposons evolve into viruses if they can't reproduce? [link] [comments]  |
| How good works shielding from solar radiation by being at planetary L2 lagrange points? Posted: 05 Feb 2019 04:37 AM PST How good is the shielding provided by the planets radiation shadow and are there planets in our solar system where this might not work? [link] [comments]  |
| Posted: 04 Feb 2019 01:57 PM PST Is it just like how we grow hair? Can they re-grow after falling out? If so, how long does that take? [link] [comments]  |
| Posted: 04 Feb 2019 11:07 AM PST For example; is it confirmed that the length of a tsunami will always be significantly larger/smaller than its height by X amount? [link] [comments]  |
| Does dark matter and dark energy also exist on Earth or only in space? Posted: 04 Feb 2019 11:44 AM PST Is there dark matter in our atmosphere surrounding us right now? If not, where is it found? As close as our orbit or way farther out in space? [link] [comments]  |
| How do strong nuclear forces create mass? Posted: 04 Feb 2019 09:22 PM PST I came across the sentence, "Most of the mass of a common proton or neutron is the result of the strong force field energy; the individual quarks provide only about 1% of the mass of a proton." in the wikipedia page. But it also says that they're caused by Gluons which have no mass. I thought conservation laws meant that mass couldn't be created or destroyed. How does this work? [link] [comments]  |
| Is CBD oil effective at treating anxiety/depression? Posted: 04 Feb 2019 10:02 AM PST I noticed CBD oil is available without prescription. The pamphlet has a disclaimer saying they can only call it a food supplement and not a medicine for treating/curing ailments. This suggests that they have no evidence of their claims and it is unregulated because it is harmless. It seems like it might be another homeopathy type "cure". I know that there is cannibas oils that are effective but it seems to me that some of them might not be. Can anyone please clarify if CBD is legit or if only the controlled versions are effective? [link] [comments]  |
| Why does the LHC need to pre-accelerate particles? Posted: 04 Feb 2019 04:07 PM PST Why can't they just accelerate them in the larger accelerator from the start? [link] [comments]  |
| Why do high performance cars get worse gas mileage than economy cars? Posted: 04 Feb 2019 12:34 PM PST Okay I understand why cars with larger engines with higher power outputs consume more fuel just because their larger displacement, but I'm more curious about why they use more fuel to do roughly the same amount of work. For an extreme example, the 2008 Lamborghini Murcielago has a 6.5 liter V-12, and makes 631 horsepower. The 2008 Toyota Corolla has a 1.8 liter I-4 and makes 126 horsepower. The cars weigh around the same, and have similar drag coefficients, but the Lamborghini will do 14 miles per gallon on the highway whereas the Corolla can do 37. In theory, shouldn't they get around the same mileage if the transmission in the Lamborghini was geared up to allow the car to cruise at highway speed at a very low engine speed? I'm just thinking that a very powerful engine is capable of doing the same work as a smaller less powerful engine but it doesn't have to work as hard since it produces so much power. Can someone help me understand? [link] [comments]  |
| Can protactinium be removed from a LFTR without shutting off the reactor? If so, how? Posted: 04 Feb 2019 07:21 PM PST I also wanted to know if anyone knew of an online resource where I could find designs for a LFTR that could possibly be scaled-down and built given enough money, time, and research. [link] [comments]  |
| Would a test for toxoplasmosis detect an infection that occurred 10 years ago? Posted: 04 Feb 2019 11:20 AM PST Here is said test: https://www.walkinlab.com/labcorp-toxoplasma-gondii-igg-abs-blood-test.html Thanks in advance. [link] [comments]  |
| Posted: 04 Feb 2019 01:21 PM PST Searching online, the difference given is that Graphene is the same as graphite, just only 1 atom thick. So what happens to the strengths of Graphene when it's used in practical applications, where there's obviously more than just 1 layer used? A Graphene battery is many many layers thick. Not 1 atom thick. How does this turn out differently from graphite? [link] [comments]  |
| Posted: 04 Feb 2019 09:32 AM PST Since last year, there have been numerous news reports of a Japanese farmer who invented a banana with edible skin. He claims that freezing banana seedlings up to -60°C will reactivate ‚ice-ages genes'. After the freezing period the banana is supposed to grow way faster and produce fruit earlier with thinner skin. How would a plant survive this and why would it trigger ancient DNA? Whats the science behind all this? How would that possible work? I couldnt find any studies or scientific explanations about this or the so-called ‚frost-thaw-awakening method' There's no real article either that questions the explanations given or goes into detail. exemplary news article: https://www.telegraph.co.uk/news/2018/02/01/bananas-edible-peel-developed-japanese-farmers/ [link] [comments]  |
| Posted: 04 Feb 2019 08:47 AM PST |
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