Is washing your hands with warm water really better than with cold water? |
- Is washing your hands with warm water really better than with cold water?
- In Layman's terms, how do the new RTX graphics cards calculate the path of light rays?
- Why does our brains tend to recall bad memories and make us in a bad mood rather than recall good memories and make us in a good mood more often?
- What happens to a material's heat capacity as it approaches the speed of light?
- How do ants find even the smallest piece of food far away from their nests?
- What causes the soft tissues to expand when humans grow?
- Is there any difference in the water that forms the rings of Saturn and the water we have on earth?
- How does our brain wake itself up?
- Why do we get older?
- Why Don’t we have fusion power yet?
- Why do different oral magnesium salts (supplements) have different bioavailability measures?
- Is rust AKA iron oxide potentially toxic or harmful to humans?
- If you kept a person in a room in which nothing ever emitted light at wavelengths below 550 nm, would their blue-sensitive cone cells atrophy?
- How do far away space probes like New Horizon account for the motion of the Earth and the probe during communications transmission and reception?
- Whats the deal with Asteroid 2002 NT7?
- Why does Hypocalcemia cause Tetany?
- How do nautiluses stay upright while swimming?
- How do you predict the way a reation is going to take?
- Does Fire Extinguish Easier in Cold Weather?
- How much of earths mass is due to its spin?
- How do we know the surface temperature, chemical makeup, ages of rock formations, and other details of other planets? How can images and other data tell us these things? A lot of it seems like a stretch. How much of it is conjecture?
| Is washing your hands with warm water really better than with cold water? Posted: 30 Aug 2018 01:10 PM PDT I get that boiling water will kill plenty of germs, but I'm not sold on warm water. What's the deal? [link] [comments]  |
| In Layman's terms, how do the new RTX graphics cards calculate the path of light rays? Posted: 31 Aug 2018 01:28 AM PDT |
| Posted: 31 Aug 2018 05:50 AM PDT |
| What happens to a material's heat capacity as it approaches the speed of light? Posted: 31 Aug 2018 01:47 AM PDT As an object's velocity increases close to the speed of light so does it's apparent mass which makes continual acceleration to c essentially impossible. My question is does this apparent increase in mass effect the thermal properties of the material involved? Would it be harder to melt a block of ice going 99.9% the speed of light than an identical block of ice going at 0.01c? [link] [comments]  |
| How do ants find even the smallest piece of food far away from their nests? Posted: 31 Aug 2018 07:27 AM PDT |
| What causes the soft tissues to expand when humans grow? Posted: 31 Aug 2018 06:05 AM PDT Say someone grows a foot over three years. For example, what makes sure that his intestines grow at the same rate so he doesn't have disproportionately small intestines bouncing around in him whenever he walks? Or what makes sure that our muscles grow longer when we grow so that we're not stuck with the arms of a two-year old? [link] [comments]  |
| Is there any difference in the water that forms the rings of Saturn and the water we have on earth? Posted: 31 Aug 2018 06:18 AM PDT So I recently read that the icy rings that orbit Saturn are made up of 99.9% pure water. Is the water there more purified than the water we have on Earth? Once we filter or purify water here on Earth, does it match the purity of the water that can be found in the rings of Saturn? [link] [comments]  |
| How does our brain wake itself up? Posted: 31 Aug 2018 12:17 AM PDT |
| Posted: 31 Aug 2018 04:02 AM PDT We are made of cells, and these cells are bunch of atoms connecting to each other. But atoms can't be drained out of energy, so why do we get older and die when the atoms keep vibrating? (Not a native English speaker, sorry if I was unclear.) [link] [comments]  |
| Why Don’t we have fusion power yet? Posted: 30 Aug 2018 08:25 PM PDT I was just wondering why we don't have fusion power yet. I know that right now the reactors are highly inefficient but I was wondering if there was a specific reason? Is it the material that the reactors are made of or the amount of hydrogen and deuterium and tritium needed. [link] [comments]  |
| Why do different oral magnesium salts (supplements) have different bioavailability measures? Posted: 31 Aug 2018 02:10 AM PDT Hi all. I have always wondered why Mg salts are reported to have different oral absorption rates and bioavailability in studies. Isn't Mg in all oral salts paired with acids that are weaker than hydrochloric acid? Wouldn't all Mg then turn into MgCl2 and whatever acid made the salt in solution inside the stomach? I must admit that my chemistry knowledge is limited, so I would love a clear answer to this. Thanks! [link] [comments]  |
| Is rust AKA iron oxide potentially toxic or harmful to humans? Posted: 31 Aug 2018 01:29 AM PDT If you want detail about why I'm asking this question, see below. Otherwise, the title should suffice as the pithiest version of this question. This is really a question about rust developing on coffee grinder burrs, specifically the burrs on a popular hand grinder known as the Aergrind. I've been having an very anxious week and the weirdest shit is getting to me, so I gotta' ask. Some wet/damp beans went into my new Aergrind earlier today, which has only grinded about 12oz of beans over a week and a half (so, I'm not sure how much of that oily "protective coating" has developed on the burrs, which apparently protects against some water). Since then, I've become obsessed with the idea of rust developing on the burrs. Can't even see the Aergrind's burrs clearly, so I can't confirm one way or the other. Then I found this from Baratza's website: "Rusty Burrs - Really?". Noted in that article is the following:
I'm assuming this applies to other grinders, including the Aergrind. If this is true, why are many coffee connoisseurs (i.e., not me; I'm an utter amateur) so fastidious about not getting water on the burrs like it'll be the end of the equipment or something terrible will happen? The same article also cites the following:
Then again, rust is an iron oxide, and you can get sick from iron overdose, but does that also apply to iron oxide? Correct me if I'm wrong, that would be pretty nearly impossible just from rusty burrs regardless of how many beans you're grinding, right? So, as far as ingesting coffee that's been ground up via a rusty burr, are there any actual -- and significant/meaningful -- downsides? [link] [comments]  |
| Posted: 30 Aug 2018 11:08 PM PDT |
| Posted: 30 Aug 2018 09:56 AM PDT At over 4 billion miles away, the signal would take 6 hours to reach Earth which would have moved about 389 thousand miles. Does the probe account for this motion and realign its transmission antennas? Edit: Apparently, there would not be too much precise calculations due to the frontal lobe of the signal spreading out enough that as long as the transmission antenna was pointed in the direction of Earth, the signal could be received. Also once a probe is far enough above or below the ecliptic, obstruction would not be a major issue. As for the displacement of the Earth during transmission, it would be minimal given the distance of the probe. Conclusion: I leaned a lot about probe signal transmission and reception. Which was the intent of this post. Thanks /r/askscience ! :) [link] [comments]  |
| Whats the deal with Asteroid 2002 NT7? Posted: 30 Aug 2018 09:58 PM PDT I remember when NASA predicted that this asteroid would likely hit Earth and calculated the accuracy of that statement down to the time it would hit. 11:47 am, February 1st, 2019. Then four days later they changed their prediction and said its collision is unlikely. So the questions are: How did they go about changing their minds? Is four days really enough time? How unlikely is it that said asteroid hits Earth? [link] [comments]  |
| Why does Hypocalcemia cause Tetany? Posted: 30 Aug 2018 09:01 PM PDT The textbook just says hypocalcemia increases neuronal excitability. But what about how calcium is needed to release ACh from synaptic knobs? How are the muscles stimulated without ACh in that case? Or does anyone have one of those ".edu" or ".html" links that have very simple explanations (similar to like this) which explains Calcium's role in the action potential? Thanks for any help [link] [comments]  |
| How do nautiluses stay upright while swimming? Posted: 30 Aug 2018 01:29 PM PDT I'm interested in nautilus locomotion. Apparently they rise and sink by osmosis, and suck water in and out to move forward. How do they remain upright? Are they passively stable based on their anatomy, or do they have to actively try to remain upright? [link] [comments]  |
| How do you predict the way a reation is going to take? Posted: 30 Aug 2018 10:52 PM PDT |
| Does Fire Extinguish Easier in Cold Weather? Posted: 30 Aug 2018 10:52 PM PDT |
| How much of earths mass is due to its spin? Posted: 30 Aug 2018 03:16 PM PDT Does a top have more energy when it is spinning than when it is stationary? Does a ball have more energy when spinning? Does a planet? Since we know that energy is equivalent to mass, how much of Earth's mass is due to it's spin? [link] [comments]  |
| Posted: 30 Aug 2018 06:54 PM PDT |
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