| In light of the recent first Marsquake recorded, what causes Marsquakes? Does Mars have tectonic plates like Earth? Posted: 27 Apr 2019 12:18 AM PDT |
| Why don't planets twinkle as stars do? My understanding is that reflected light is polarised, but how it that so, and why does that make the light not twinkle passing through the atmosphere? Posted: 26 Apr 2019 08:35 AM PDT |
| “23559” listed as makeup ingredient, what is it? Posted: 26 Apr 2019 04:10 PM PDT Not sure if this is the right place but it's worth a shot, I thought chemistry was the most appropriate flair so I hope that's right. Obligatory apologies for mobile. So I had a weird reaction to my makeup remover so I'm going through my different products' ingredients trying to figure out what did it. The "good" makeup remover I'm comparing the "bad" one to has the number 23559 listed as the last ingredient with no chemical name before it, so I'm confused. There's a comma before it so it's not associated with the previous ingredient (which is "Red 40 (CI 16035)" if that matters). I've tried googling stuff but I came up short so I figured I'd ask you guys. Thanks in advance! Edit: I found a link with the ingredients listed & it has 23559 listed as the last ingredient just like the bottle. submitted by /u/crave-perspective [link] [comments] |
| If light is produced by the release of photons when electrons return to stable energy levels, why do blackbody objects emit light over a continuous and wide spectrum? Posted: 27 Apr 2019 06:52 AM PDT Doing some light reading on the Internet and was reading up on black body objects and why objects glow when they heat. I was told that photons are released through the excitement of electrons, and then you have things with emission spectrums and so on. This implies that the spectrum should only have very specific wavelengths of light. However, I have looked at spectrum graphs of objects such as incandescent lightbulbs and found that they emit light over a continuous spectrum of various intensities that extend over a significant range of wavelengths. Why is this so? Why are the emission spectrum wavelengths not emitted? What is it in the function of blackbody objects that make them emit light across a constant stream of wavelengths? submitted by /u/SolarSupport [link] [comments] |
| The 2011 earthquake in Japan shortened the length of the day by 1.8 microseconds. How was this measured? Posted: 26 Apr 2019 04:35 PM PDT |
| When the Suez Canal was dug, how were the ecosystems of the Mediterranean and Red Sea affected? Posted: 26 Apr 2019 12:56 PM PDT |
| How does browning of meat during the cooking process occur without any listed sugar? Posted: 27 Apr 2019 04:40 AM PDT I was under the impression, that the brown color of the sear of e.g. a steak comes mostly from the Maillard reaction. Wikipedia tells me, that the Maillard reactions requires both proteins and sugars to occur.
While theres obviously plenty of protein in any meat, the label always says '0g carbohydrates'. I have also read, that red meat contains the sugar Neu5Gc (that ones a topic for another day). So my question(s) would be: Are trace amounts of sugars (too little for the label) enough to facilitate the Maillard reaction? Does the label not have to list "special" carbohydrates other than the more well knowns, like sucrose, fructose etc etc.? submitted by /u/Morczubel [link] [comments] |
| Where are our memories stored? Posted: 26 Apr 2019 11:07 PM PDT |
| How do you determine if a liquid that exists on Mars or Europa is H2O molecules? Posted: 26 Apr 2019 07:47 PM PDT It's not like scientists brought a sample to Earth and analyzed it, but why can they say it's water? submitted by /u/HanGUl95 [link] [comments] |
| Do some microorganisms live in cloud formations? Posted: 26 Apr 2019 02:50 PM PDT |
| I get how cosmological redshift works, but how do we know what the original wavelength of that light was? Posted: 26 Apr 2019 01:06 PM PDT I get that astronomers use redshift to measure distance to galaxies, and kind of understand how it could happen. But how do we know what the original wavelength of that light was to measure how much it's shifted? submitted by /u/ChanceState [link] [comments] |
| Is it reasonable all isotopes heaver than Hydrogen-1 will eventually decay? Posted: 26 Apr 2019 12:41 PM PDT The recent announcement about Xenon-124 decaying with a gargantuan half life has me wondering if all elements are unstable, given infinite time. It was explained to me in chemistry that particles seek the lowest possible energy state. How far can that go? Iron? Hydrogen? Smaller? submitted by /u/sctprog [link] [comments] |
| How do you prove the existence of ‘black holes’ ? Posted: 26 Apr 2019 09:30 PM PDT |
| Does transmission through various corrective lens materials, e.g. contacts and glasses affect the spectral distribution transmitted? Posted: 26 Apr 2019 08:22 AM PDT Or do they design around this to achieve a relatively "flat" transmission curve? I can only find info about the percent of total light transmitted compared to the refractive index, so maybe I just don't have the right google terms. And of course there's loads of info about sunglasses but that's not what I am interested in submitted by /u/StraightTooth [link] [comments] |
| How are new antibiotics created and tested? Posted: 26 Apr 2019 09:24 AM PDT |
| Can satallites take photos of planets outside of our solar system? Posted: 25 Apr 2019 10:08 PM PDT I'm typing this on my phone at 1 am. So please excuse me if I dont make sense or I mess up somewhere. Hi, so with the recent photo of the black hole it got me thinking. If we can take a photo of a black hole that is a million light years away, why cant we take photos of planet surfaces? I looked up how planets can sustain life, and I was told that up to 40 million planets CAN inhabit life. And that 11 million of them are very closely related to Earth. If our satallites can take photos of our planet, can we take photos of other "earth-like" planets? Maybe to see if there are other lifeforms? Basically what I'm saying is, why dont we check for lifeforms by taking photos of planets closest to ours? Edit: Thanks for all the answers! I really appreciate it. It's just the thought that there would be chance of finding other intelligent lifeforms like us. And I was thinking if I should put this in Astromy but I felt like Planetary Sci. wouldve been better. Thanks submitted by /u/ohyeahsadboy [link] [comments] |
| How was the world map created? Posted: 25 Apr 2019 08:29 PM PDT |
| I’ve read that plastic slowly decomposes over about 1000 years. What exactly causes it to decompose over such a long period of time? Why doesn’t it just never decompose? Posted: 25 Apr 2019 06:59 PM PDT |
| What is happening on a cellular level when we get dry skin? Posted: 25 Apr 2019 08:20 PM PDT I have tried googling this but cannot find anything like I am looking for. I'm curious what changes, if any, happen to skin cells when the skin gets dry and how applying lotion impacts those cells. submitted by /u/Sabora12 [link] [comments] |
