Why did the Fukushima nuclear plant switch to using fresh water after the accident? |
- Why did the Fukushima nuclear plant switch to using fresh water after the accident?
- Will age/time work differently for a colony on Mars than it would on Earth/would a person be younger/older on one versus the other?
- A common symptom of severe radiation exposure is nausea and vomiting shortly after. What biological mechanism is affected by the radiation to result in these symptoms so soon after exposure?
- Does each percent of your phone battery last the same amount of time or does it drain faster as it approaches 0%?
- How long after death can frogs be electrostimulated?
- Why do fruits bruise? Why does the bruised flesh taste different from the rest?
- How do submarines keep from rolling underwater?
- How are nuclear cores set up and eventually removed if they are so radioactive? Are they less radioactive at these points?
- Is it possible to transmit composite/coaxial tv over fm radio?
- If you windmill your arms in outer space, do you rotate or do you stay stationary?
- What drives stellar nurseries to expand outwards and the stars to separate instead of remaining in a cluster?
- If a Thermos flask maintains heat by blocking conduction/convection by means of a vacuum gap in its walls, does that mean sound is also unable to travel through the walls?
- Is it possible to artificially induce strong intermolecular forces?
- Do high radiation levels have any immediate, short-term, and long-term effects on human memory formation and cognitive abilities?
- What does zero point energy mean and how does it correlate to quantum physics?
- Do photons have any mass or they just have no mass at all?
- Is there a difference between how information and experiences are remembered?
- Special Relativity question too long for title (see text)?
- Can telescopic images taken during the Earth's orbit around the sun be peiced together similarly to those taken by the network of telescopes around Earth, which were used for the recent black hole images?
- Physics of archery: Does it matter if the bowstring is loose at the end of release?
- Are Black Holes Magnetically Active and If so How is the magnetic field produced?
| Why did the Fukushima nuclear plant switch to using fresh water after the accident? Posted: 29 May 2019 06:45 PM PDT I was reading about Operation Tomodachi and on the wikipedia page it mentioned that the US Navy provided 500,000 gallons of fresh water to cool the plant. That struck me as odd considering they could just use sea water. After doing some digging this was all I could find. Apparently they were using sea water but wanted to switch over to using fresh water. Any idea why? [link] [comments]  |
| Posted: 30 May 2019 07:04 AM PDT |
| Posted: 29 May 2019 09:29 PM PDT This is a well-known effect of severe exposure to radiation. I've been searching online to find out what specific biological process is disrupted by the radiation to produce this effect, but I haven't found anything. I can understand the biological origin of the many longer term effects due to tissue damage, like hair falling off and diarrhea, due to the damage of the rapidly reproducing cells. But it is unclear to me why nausea and vomiting would have a much quicker onset (minutes in some severe cases recorded) via the same mechanisms. Is a destruction of the cells in the stomach lining really all there is to it, and we're just more sensitive to it? What kind of biological mechanisms induce nausea/vomiting, and how are they affected by radiation? [link] [comments]  |
| Posted: 30 May 2019 07:26 AM PDT This may be a dumb question because the word "percent" would imply equal parts UNLESS it refers a portion of the battery that is charged, meaning that some portions could last longer than others, if that makes sense. It may all just be confirmation bias, but I always feel that my phone battery drains insanely quickly during that last 15-20% while it doesn't drain as quickly off a fresh charge. Lastly, I've always heard that battery technology was moving at a snail's pace yet lately I've been hearing about phones charging to 50% in 20 mins. I'm assuming that the remaining 50% takes longer than 20 mins to charge, which is another reason I feel like each "percent" on my battery could last different amounts of time. [link] [comments]  |
| How long after death can frogs be electrostimulated? Posted: 30 May 2019 06:42 AM PDT I'm running a lab in which students will dissect frogs and electrically stimulate their legs to move. I chose frogs because I know they better retain internal ions and energy after death, but I don't know for how long. Live frogs aren't in season, so I'm not sure if I can still run the lab with preserved specimens. Google hasn't been much help and I'm hoping there's someone here who can answer my question. [link] [comments]  |
| Why do fruits bruise? Why does the bruised flesh taste different from the rest? Posted: 30 May 2019 07:51 AM PDT |
| How do submarines keep from rolling underwater? Posted: 30 May 2019 12:37 AM PDT So this question kinda has two parts First, how does the submarine resist the force of water moving laterally along it? Second, in most animations that I've seen, submarines have a single turbine that propels the craft forward, however with my background knowledge of helicopters and how the tail prop keeps it from spinning in air, how does a submarine prevent this effect in the water? [link] [comments]  |
| Posted: 30 May 2019 06:12 AM PDT Just trying to imagine how you could even use machinery to regularly place and remove the cores if they're as dangerous as damaged open cores. How often are they replaced? [link] [comments]  |
| Is it possible to transmit composite/coaxial tv over fm radio? Posted: 29 May 2019 08:11 PM PDT |
| If you windmill your arms in outer space, do you rotate or do you stay stationary? Posted: 29 May 2019 09:30 PM PDT |
| Posted: 30 May 2019 02:21 AM PDT During this expansion of a stellar nursery, do some stars collide into each other and form black holes and if not why? [link] [comments]  |
| Posted: 29 May 2019 09:42 PM PDT I don't have a small enough speaker to do an 'experiment', but would a source of sound be inaudible to an outsider if placed in a closed Thermos flask? I suppose it depends on whether the vibrating atoms can bridge the gap, which in turn depends on the amplitude of the source -- but if the gap was big enough, then surely there would be no feasible way to make a sound source that can escape the Thermos? [link] [comments]  |
| Is it possible to artificially induce strong intermolecular forces? Posted: 30 May 2019 05:00 AM PDT I was just wondering if you could create an appliance which temporarily combined gases in the air into a solid to make an "air" step. [link] [comments]  |
| Posted: 30 May 2019 04:35 AM PDT |
| What does zero point energy mean and how does it correlate to quantum physics? Posted: 29 May 2019 10:25 PM PDT I've looked up what zero point energy means but still do not understand what it really means. To my understanding it's relating about minimum energy of the universe and the energy of a proton? [link] [comments]  |
| Do photons have any mass or they just have no mass at all? Posted: 29 May 2019 01:32 PM PDT If they do have some minimal mass, could a "photon engine" work in a fantasy spacecraft where it just blasts a powerful laser backwards to get propulsion? [link] [comments]  |
| Is there a difference between how information and experiences are remembered? Posted: 29 May 2019 05:15 PM PDT This is question popped into my head after I noticed that I seem to be able to remember and recall information, facts, and knowledge really easily, but events and experiences always seem to be much more fuzzy in my memory. So, I was wondering if there were any notable differences in the storage, maintenance, and recollection of these things. [link] [comments]  |
| Special Relativity question too long for title (see text)? Posted: 29 May 2019 07:52 PM PDT You shine light on X Axis to both sides. For Say 10 seconds. They both Travel 10LightSeconds Distance. Total 20LS. To each opposite photons doesn't it look like the opposite photons are going 2xLS? I was trying to explain it in my head that perhaps light doesn't experience time. (Which I believe is true). So sub it with any object that travels at speed > 0.5 LS [link] [comments]  |
| Posted: 29 May 2019 06:14 PM PDT The Event Horizon Telescope is a network of international telescopes which collected data that was peiced together (through a process called interpolation) to create the recent black hole images. A much larger area is covered by the Earth's orbit around the sun, so would a similar process be possible to look much further? If so, would the view for this be limited to a perpendicular line through the flat plane of Earth's orbit? [link] [comments]  |
| Physics of archery: Does it matter if the bowstring is loose at the end of release? Posted: 29 May 2019 11:05 AM PDT I made a giant 4 armed ballista (scorpion?) inspired by the giant one in game of thrones. Here is a youtube video for reference. https://www.youtube.com/watch?v=2ReBMjJU7vc (the part relevant to my question is at 3:50) A lot of comments saying I would have better performance if the bowstring was taut on release. Right now the string is 'loose' on arrow release. I just figured if I pulled it back until it reached 1000 pound draw, the springs would be storing the same about of energy, but the draw would be longer because the string was not tight to begin with. My argument against the making string tight to begin with is simple design. Mainly due to having to bend the limbs back enough to clear the mounting plate for the limbs. And for example say it would be loaded with around 200lbs of force bending the arms back. Then if I pulled the arrow back to 1000lbs, there would only be 800lbs of force available to act on the arrow. Im just wondering if there is an advantage to have the limbs and bowstring tight and under tension at the release point, and why this is so. Thank you! [link] [comments]  |
| Are Black Holes Magnetically Active and If so How is the magnetic field produced? Posted: 29 May 2019 06:38 AM PDT |
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