How do we know the age of the universe, specifically with a margin of error of 59 million years? |
- How do we know the age of the universe, specifically with a margin of error of 59 million years?
- What causes different materials to expand or contract at different rates?
- Is there any wildlife at all in the Antarctic interior?
- What makes paper fresh from the copier hot? Why don't inkjet printers produce the same amount of heat as copiers do?
- What causes our throats to be sore after we use a loud voice?
- Colorblindness comes from a defect in the cones to perceive colors, is there a version where the cones work, and the rods are deficient?
- Do other animals get insomnia?
- Why is your reflection in a spoon upside down?
- How come when you look at something very bright like the sun, how come you can still see it briefly when you close your eyes?
- Can real life sounds, like an alarm clock going off, carry over into a dream?
- What makes certain materials perform well under pressure but poorly on impact(ie concrete, carbon fiber, etc)?
- Does urine slosh around in the bladder?
- What makes water taste old?
- What is the surface of diamond made out of?
- What mechanic/s does Clear Eyes use to reduce/remove redness in the eyes?
- How do we know that hunter-gatherer societies were egalitarian?
- When wiping something down with alcohol, what is that filmy residue that's left behind?
- When I take a fidget spinner by the centerpiece and launch the edge, it can spin for minutes. When I take it by the edge and launch the centerpiece, it stops after a few seconds. Why is there even a difference? Shouldn't the situation be symmetric? Something something frames of reference?
- What happens in the eyes / brain during a migraine?
- Why does the body/stomach hurt so much when we laugh really hard?
- Are our ears unable to detect pitches beyond human hearing? Or is our brain designed to ignore those pitches?
- What is the difference between osmotic pressure, oncotic pressure, and hydrostatic pressure? (Renal physiology)
- How can I predict how much a small particle of arbitrary shape will diffuse?
| How do we know the age of the universe, specifically with a margin of error of 59 million years? Posted: 26 May 2018 04:17 AM PDT |
| What causes different materials to expand or contract at different rates? Posted: 25 May 2018 08:20 PM PDT Recently finished the thermodynamics unit in physics, and wanted to know what causes different materials to expand or contract at different rates? Does it have anything to do with the heat capacity, or are they two separate things? (I am aware that it is called the "coefficient of linear expansion" btw) [link] [comments]  |
| Is there any wildlife at all in the Antarctic interior? Posted: 26 May 2018 05:27 AM PDT I saw this bit of a nature documentary about a penguin who goes marching off toward a mountain, away from the coast where all his penguin buddies hang out and occasionally go diving to eat fish. The narrator said the penguin was headed toward "certain death." Which makes sense, what's he going to eat? Is there anything at all in the interior of Antarctica away from the coast? It's frozen all year round and most of the land is covered by glaciers. [link] [comments]  |
| Posted: 25 May 2018 09:20 PM PDT |
| What causes our throats to be sore after we use a loud voice? Posted: 26 May 2018 06:21 AM PDT I realized that this is something very basic that I don't understand. I can understand why using your voice for a long time causes a sore throat, from it getting dried out, hence why water is so helpful to broadcasters. But even if I yell for a short period of time, my throat becomes sore. Why? [link] [comments]  |
| Posted: 25 May 2018 10:24 AM PDT Most of the information I see on color blindness is around the inability of eyes to detect specific wavelengths due to changes in the cones, however, I'm curious if there is a inverse colorblindness of sorts, where people are able to see all wavelengths of color, but aren't able to discern intensities or values coming from the rods. [link] [comments]  |
| Do other animals get insomnia? Posted: 26 May 2018 02:50 AM PDT |
| Why is your reflection in a spoon upside down? Posted: 25 May 2018 07:48 PM PDT |
| Posted: 25 May 2018 06:43 PM PDT |
| Can real life sounds, like an alarm clock going off, carry over into a dream? Posted: 25 May 2018 04:18 PM PDT |
| Posted: 25 May 2018 10:02 PM PDT |
| Does urine slosh around in the bladder? Posted: 25 May 2018 11:08 PM PDT There's probably not any air in the bladder so imagine the answer is no but the question occurred to me so here we are [link] [comments]  |
| Posted: 25 May 2018 01:14 PM PDT |
| What is the surface of diamond made out of? Posted: 25 May 2018 12:47 PM PDT I've been taught that diamond has it's specific properties because it is an allotrope of carbon with each carbon atom bonded to 4 other carbon atoms forming a tetrahedral structure. This structure repeats itself until you get to the edge or surface of the material. Are there carbon atoms at the surface of a diamond only bonded to 1 only other carbon atom or only up to 3 carbon atoms and if so, is it still considered diamond at the surface? [link] [comments]  |
| What mechanic/s does Clear Eyes use to reduce/remove redness in the eyes? Posted: 25 May 2018 11:13 PM PDT |
| How do we know that hunter-gatherer societies were egalitarian? Posted: 25 May 2018 05:38 PM PDT I've looked at a couple of artictles and they claim that hunter-gatherer societies didn't follow a hierarchical structure. Moreover, they di that in a way that seems to be implying that all individuals had approximately equal say in group decisions, with no "alpha male" or something similar. Is this true and what sort of evidence do we have to support it? [link] [comments]  |
| When wiping something down with alcohol, what is that filmy residue that's left behind? Posted: 25 May 2018 11:13 AM PDT |
| Posted: 26 May 2018 12:13 AM PDT |
| What happens in the eyes / brain during a migraine? Posted: 25 May 2018 08:20 PM PDT I occasionally get very severe migraines, to the point where all I can do is sit in my bathroom with all the lights off puking until it goes away in a few hours. There are 3 main symptoms I experience:
What's going on in my eye / brain that causes these symptoms? [link] [comments]  |
| Why does the body/stomach hurt so much when we laugh really hard? Posted: 25 May 2018 07:44 PM PDT Always had this in the back of my mind, kinda funny to think about.... [link] [comments]  |
| Posted: 25 May 2018 09:05 AM PDT |
| Posted: 25 May 2018 09:54 PM PDT |
| How can I predict how much a small particle of arbitrary shape will diffuse? Posted: 25 May 2018 10:45 AM PDT I understand the "Stokes-Einstein equation"#Stokes-Einstein_equation) and how much a spherical particle will diffuse when it is small and experiencing purely Brownian forces. But what about particles that are not spherical? Is there a process to calculate the translational diffusion coefficient for a particle of arbitrary size? [link] [comments]  |
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