- A flu shot is a vaccine, right? But they seem to be far less reliable than other vaccines (I know many people who get flu shots each year then get the flu). What is the reason for this, and are flu shots really that important?
- How did scientists calculate the amount of hydrogen left on the sun and thus calculated the age of the sun?
- Can you grow a plant just by the light from a wood fire?
- Is the universe itself spinning just like galaxies do?
- Is there any difference between mine salt and sea salt? How do we have 2 seemingly different sources of salt?
- How does a strong magnet fall in a copper tube?
- How massive can a rocky planet be?
- How do we know it takes plastic 1k yrs to decompose if we used plastic for only 100 yrs?
- Is there any difference in getting vitamins and minerals from a multivitamin as opposed to actual food?
- Does the efficiency of a nuclear power plant depend on the level of uranium enrichment? And if so, where is the “sweet spot” of enrichment?
- Is it possible to have very vivid false memories?
- What is spreading pressure and how is it related to the description of multicomponent adsorption?
- How do space agencies prevent germs and bacteria on their rovers (Mars Rover) from contaminating the planet they visit?
- Why doesn’t chemotherapy have a 100% success rate?
- How does a receiver antenna physically recieve em waves? Trying to understand bluetooth radio.
- Why are all the continents wider in the north?
- Why does a positive caster angle in cars lead to the rise of a self-centering wheel effect in cars? Specifically what is the physics behind it?
- Can isolated mountains like Erebor, the Lonely Mountain from LOTR actually exist in real life?
- Since DNA is changed by transcription errors/ionizing radiation, do different parts of your body have very slightly different DNA?
- Is there a reason for rocky planets to be closer to a star and gas giants to be farther, or is that grouping in our solar system coincidental?
- How big can a planet get??
- How is a stock's price determined?
- Can an object move through time independent of space?
| Posted: 14 Jan 2019 07:45 AM PST |
| Posted: 13 Jan 2019 10:36 PM PST |
| Can you grow a plant just by the light from a wood fire? Posted: 13 Jan 2019 02:41 PM PST Also, would there be a difference in growing a plant by a wood fire or a natural gas fire, given both flames were the same general brightness? Is it possible to grow food by that firelight? [link] [comments]  |
| Is the universe itself spinning just like galaxies do? Posted: 13 Jan 2019 03:01 PM PST |
| Posted: 14 Jan 2019 03:50 AM PST |
| How does a strong magnet fall in a copper tube? Posted: 13 Jan 2019 08:41 PM PST It can be shown when a magnet is dropped through a copper tube its change in magnetic flux creates a retarding force therefore slowing the magnets rate of decent. It can also be shown that this flux is proportional to the change in the magnets velocity. My question plainly is what happens when the magnets "strength" or corresponding electromotive magnitude approaches infinity? At first I assumed the magnet would no longer move but if that where the case there would no longer a velocity, resulting in the retarding force becoming zero. It seems the magnet would neither fall or not fall. The paradox at hand and my lack of knowledge of Lenz law has prevented me from studying this case in any intimate mathematic detail. Perhaps such a strong magnet and uniform field would not initiate enough change in flux to create a retarding force at all. What could this say about uniform fields and "infinitely strong" sources? [link] [comments]  |
| How massive can a rocky planet be? Posted: 13 Jan 2019 10:10 AM PST Is there an upper limit to how much mass a rocky planet can have? If so what happens beyond this limit? [link] [comments]  |
| How do we know it takes plastic 1k yrs to decompose if we used plastic for only 100 yrs? Posted: 13 Jan 2019 02:18 PM PST |
| Posted: 13 Jan 2019 07:40 AM PST For example, could one live a healthy lifestyle by eating a a good mixture of whatever fats, carbohydrates, and proteins they prefer plus a multivitamin? [link] [comments]  |
| Posted: 13 Jan 2019 07:30 PM PST Context: I was reading a little on the Iran nuclear deal in the news and they mentioned that the deal limited them to a pretty low percentage, but the Iranians had considered making a plant that could produce up to 20% enrichment. A quick google search suggested 80-90% enrichment is needed for weapons.... so what would the higher enriched uranium be good for? [link] [comments]  |
| Is it possible to have very vivid false memories? Posted: 13 Jan 2019 01:48 PM PST So a good while ago, I had a traumatic experience where I was blackmailed during a conversation with 3 people/strangers that I met somewhere. Ever since, I have been medicated for severe anxiety and depression and it ruined my life. After 3 years of digging, I still can't find a trace of these individuals. Nothing, zelch. I was on both adderall and diazepam at the time and i was a bit exhausted/sleep deprived. I am starting to question if the conversation even happened. I recall the memory with extreme clarity. Is it possible to have full on vivid and traumatic false memories? [link] [comments]  |
| What is spreading pressure and how is it related to the description of multicomponent adsorption? Posted: 14 Jan 2019 02:40 AM PST |
| Posted: 13 Jan 2019 08:50 AM PST Or do they even try and prevent it? Am I correct in thinking that the scientists have something in place to stop living organisms/bacteria contaminating Mars when objects come in contact with the planet? If so how is it done? [link] [comments]  |
| Why doesn’t chemotherapy have a 100% success rate? Posted: 13 Jan 2019 11:57 AM PST From what I understand from A level chemistry chemotherapy uses cisplatin to stop the replication of the DNA in cancer, and subsequently affects the healthy DNA aswell. The Cl is displaced as the platinum bonds with the guanine in the DNA of the cancer, so if this stops it replicating why does chemo not have a 100% success rate? [link] [comments]  |
| How does a receiver antenna physically recieve em waves? Trying to understand bluetooth radio. Posted: 13 Jan 2019 09:30 PM PST Just out of generally curiousity , I'm wondering how an anetenna "recieves" the em waves / radio waves. Not sure how to google this sort of question. Does an electromagnetic field induce an electric current in the anetnna, sending electric current patterns (pulses or waves) down the antenna? Then the antenna transfers the current to wherever, like a wave interpreter module or something. If this is the case, How would a Bluetooth antenna know which set of waves or current patterns to select? If they communicated on a different channel then other types of wireless antennas , how would a device work if a Bluetooth antenna was sitting in the middle of ten other blue tooth devices transmitting sending a bunch of signals? [link] [comments]  |
| Why are all the continents wider in the north? Posted: 13 Jan 2019 01:39 PM PST All the continents (except Australia) are wider in the north and thinner in the south, why is that? [link] [comments]  |
| Posted: 13 Jan 2019 12:55 PM PST |
| Can isolated mountains like Erebor, the Lonely Mountain from LOTR actually exist in real life? Posted: 13 Jan 2019 08:40 AM PST You usually find a mountain as a part of a mountain chain. Is it possible for geological phenomena to favor the formation of a fairly large mountain that exists in isolation, without being a part of a mountain chain? [link] [comments]  |
| Posted: 13 Jan 2019 01:52 PM PST DNA is changed... for better or worse (usually the latter) by transcription errors or by getting hit by ionizing radiation. But IF that cell survives to replicate, it's not like that strain of DNA will eventually be everywhere in your body. A mutated skin cell that still survives won't eventually become a blood or lung cell. So my real question is this: Could you take samples of dna from all over your body and come up with the DNA you had when you were born? Aka YOUR genetic code before any errors were made? (Minus the telomeres of course, once those are lost it's not like you can figure out what they used to be, but it doesn't matter cause you can just throw some gibberish on there to extend them.) [link] [comments]  |
| Posted: 13 Jan 2019 11:18 AM PST |
| Posted: 13 Jan 2019 11:49 AM PST I feel like most planets fall within a certain size but I don't know why size would have anything to do with a clump is mass. What would prevent a planet from becoming the size of our solar system or something? Would it turn into black hole? [link] [comments]  |
| How is a stock's price determined? Posted: 13 Jan 2019 08:17 AM PST I understand supply and demand and so forth, I'm asking how the actual number that goes on the sidescrolling screens is determined. What is that number, exactly? Who or what gets to decide what the displayed number is? I'm guessing it's the highest price that a share of that company is sold for, but I think I'm missing something since the price fluctuates so fast that you need supercomputers linked straight to the stock market to keep up. My google-fu has failed me on this one, so I'm hoping someone here has an answer for me. [link] [comments]  |
| Can an object move through time independent of space? Posted: 13 Jan 2019 11:22 AM PST To preface I'm not a physicist of any kind so forgive me if this is a daft question in the field. But I was thinking about how in Doctor Strange, the Dr. moves an aple through it's timeline and does so without moving it through space. To clarify; if 3D space is defined by the axis' X, Y, and Z on a graph. An object can move along one axis without moving on the others. If a 4th dimension of time is added to the model and defined by the axis T, could an object move along the T axis without moving on the others? Thanks in advance. [link] [comments]  |
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