Was working at Jimmy John's today when I customer came in and was severely allergic to cucumbers but could eat pickles, how's that possible? |
- Was working at Jimmy John's today when I customer came in and was severely allergic to cucumbers but could eat pickles, how's that possible?
- Is all matter composed of stardust?
- In terms of evolution, why is vitamin D synthesis dependent on exposure to sunlight?
- Why does the sun and the full moon appear bigger when near the horizon?
- Does the "location" of a headache say anything about its cause?
- We have maps of what the continents looked like millions of years ago when they were all together. How accurately can we map what the continents will look like millions of years from now?
- How do you explain photoelectric effect using quantum mechanics?
- As time progresses, does the perimeter of the visible universe recede because photons (albeit redshifted ones) from distant stars finally reach us, or does it get closer because inflation pushes stars at the edge of the visible universe away faster than their light can get to us?
- Is it possible to micro dose a poison and eventually gain immunity?
- What is the ph of liquid co2?
- Why does tidal acceleration happen sattelites that orbit a oceanless planet?
- Would mechanically moving electrons create a super-strong magnetic field?
- What are the physiological mechanisms through which "sonic weapons" could cause symptoms such as traumatic brain injury?
- My Uncle was just diagnosed with Creutzfeldt-Jakob disease (CJD), a prion disease. What makes these disorders so hard, to impossible to treat?
- What would happen if only your arm and nothing else was exposed to a vacuum?
- What makes you feel 'full' ?
- Can organ transplant recipients be organ donors?
- Why is it when I drink something really sour my cheek muscles tighten?
- Why is it bad to shampoo my hair everyday?
- [Chemistry] How do you know how many isotopes of atom exist?
- How does the distance between subatomic particles work?
- Why is Jupiters surface/atmosphere so volatile?
- Why are the hands facing forward in anatomical position?
| Posted: 17 Sep 2017 06:46 PM PDT |
| Is all matter composed of stardust? Posted: 18 Sep 2017 03:12 AM PDT And if not, just how much matter that we know and see, including our own selves, is made up of the remnants of ancient stars? Literally blows my mind that we are the product of what happens when a burning ball of hydrogen is left alone for so long, that it eventually evolves the ability to ask where it came from (us). [link] [comments]  |
| In terms of evolution, why is vitamin D synthesis dependent on exposure to sunlight? Posted: 17 Sep 2017 06:47 PM PDT |
| Why does the sun and the full moon appear bigger when near the horizon? Posted: 17 Sep 2017 06:45 PM PDT |
| Does the "location" of a headache say anything about its cause? Posted: 17 Sep 2017 11:56 AM PDT |
| Posted: 17 Sep 2017 12:20 PM PDT |
| How do you explain photoelectric effect using quantum mechanics? Posted: 18 Sep 2017 04:05 AM PDT I understand that photoelectric effect can be explained using photons, where light comes in quantised, discreet amount of energy. I also understand that the wave-particle duality theory isn't strictly true and it's more of a probablity wave. How do you explain the photoelectric effect then? How does the electron and photon interact when they exist as a cloud of probabilities? Am I missing something in my understanding? Thank you [link] [comments]  |
| Posted: 17 Sep 2017 07:15 PM PDT I'm not asking about the absolute size of the visible universe; I'm asking if the number of stars inside the boundary line is increasing or decreasing (stellar lifecycles aside!) [link] [comments]  |
| Is it possible to micro dose a poison and eventually gain immunity? Posted: 17 Sep 2017 11:54 AM PDT I'm thinking like what happened in the film The Princess Bride. The idea is that if you were to take enough aspirin to the point where regular sized doses don't really affect you, would you be able to do the same with something like cyanide for example? I know movies are usually BS but is there any basis in fact there? [link] [comments]  |
| Posted: 17 Sep 2017 06:33 PM PDT I know this can only exist under considerable pressure, but I'm curious and can't seem to find an answer. [link] [comments]  |
| Why does tidal acceleration happen sattelites that orbit a oceanless planet? Posted: 18 Sep 2017 06:30 AM PDT I have to write a superficial essay about to moon, but went down the rabbithole of wikipedia articles and I got stuck with a question.
In a wikipedia article regarding Tidal acceleration, they claim that the acceleration is present between all prograde natural sattelites and their primary, but the explanation provided for the earth-moon system relies on the mass deplacement from the oceans, which create a torque that slows down the earth and moves the moon away.
How does this happen on satellites that orbit a primary that does not have liquid water, the article states that in most cases tidal acceleration is neglible, and not comparable to the earth moon situation, but I was wondering how the effect even happens in those systems?
Is it simply because the center of mass of the planet is not on the rotational axis? Or is there some different proces? [link] [comments]  |
| Would mechanically moving electrons create a super-strong magnetic field? Posted: 17 Sep 2017 06:24 PM PDT According to this Veritasium video, the magnetic field in a wire with a non-zero current is an artifact of special relativity. A moving charge sees a speed difference between the wire and the electrons in it (since the electrons are moving). Due to Lorentz contraction there appears to be a net positive charge and a repelling force arises. The physical speed of electrons supporting a current is very slow, a few micrometers per seconds, but due to the number of electrons and the strength of the electric field the effect is macroscopic. What if you could mechanically increase this speed? Say you had a charged capacitor, and one of the plates was given a parallel velocity. E.g. two concentric cylinders with a charge imbalance, with one of them attached to a motor. Wouldn't that create a very strong apparent magnetic field? [link] [comments]  |
| Posted: 17 Sep 2017 01:47 PM PDT I was curious when hearing about the alleged "sonic attack" at the American embassy in Cuba. I was wondering what the exact mechanism might be through which a localized sound wave can cause such effects. What is known about this subject? [link] [comments]  |
| Posted: 17 Sep 2017 05:54 PM PDT My uncle has been given less than 6 months to live. Our family is in utter shock at the moment. I have been doing a lot of reading, and I understand brain diseases are always problematic because of the brain-blood barrier. But what else makes prion diseases so hard to treat. Also, does anyone know of any experimental treatments? Thank you. [link] [comments]  |
| What would happen if only your arm and nothing else was exposed to a vacuum? Posted: 17 Sep 2017 07:37 PM PDT Let's assume you had a vacuum chamber with a hole somewhere in the wall you put your arm through which sealed it perfectly [link] [comments]  |
| Posted: 17 Sep 2017 05:25 PM PDT I was wondering, when you feel full, as in you don't want to eat anymore, is it the volume of the food that makes you feel this way, or is it the caloric content? [link] [comments]  |
| Can organ transplant recipients be organ donors? Posted: 17 Sep 2017 07:19 PM PDT Let's say you receive a heart transplant. You live a full life and die by some other means than heart related issues. Is that heart eligible to be donated again? [link] [comments]  |
| Why is it when I drink something really sour my cheek muscles tighten? Posted: 17 Sep 2017 03:57 PM PDT |
| Why is it bad to shampoo my hair everyday? Posted: 17 Sep 2017 11:38 AM PDT I've heard that its bad for your hair but I'd like to know the science behind it. [link] [comments]  |
| [Chemistry] How do you know how many isotopes of atom exist? Posted: 17 Sep 2017 08:00 PM PDT I'm trying to understand. I know that an an element is determined by the protons in it's nucleus. If Hydrogen gains a proton then it is now Helium. But how do you know how many isotopes there can be? Carbon 12 has 6p and 6n, but could I go as low as having 6 protons and 1 neutron or is that not possible and is it something that I will just have to memorize? [link] [comments]  |
| How does the distance between subatomic particles work? Posted: 17 Sep 2017 12:55 PM PDT From what I understand the strong force acts between about 0.8 to 3fm. I'm trying to understand the distance between protons/neurons in a nucleus and between quarks within a nucleon, and how they relate to each other. I've read that the distance between quarks is approximately 0.8fm and the distance between nucleons is approximately the range of the strong force. This suggests that the protons overlap and have a pretty undefined size. Is it right to assume that a nucleus is more like a cloud of quarks that don't have a set distance or any distinct bounds? Having seen diagrams of nucleons being a sort of bubble containing 3 quarks at a set distance and nucleuses being a little collection of multicoloured spheres my whole life has lead me to a lot of confusion about this topic... [link] [comments]  |
| Why is Jupiters surface/atmosphere so volatile? Posted: 17 Sep 2017 11:49 AM PDT Just saw the new Juno image of Jupiters South Pole and all the storms that are up to 1000km across. How or why is the surface/atmosphere in such chaos, bringing to mind the "red spot" which has been raging for hundreds of years. What also makes these storms last for so long and why are the colours of the storms so different? Cheers! [link] [comments]  |
| Why are the hands facing forward in anatomical position? Posted: 17 Sep 2017 06:07 PM PDT Twisting the hands outwards causes stress in the forearm. Wouldn't it be easier to examine a body that is under as little stress as possible? [link] [comments]  |
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