What makes some materials like cat fur or velvet feel soft? |
- What makes some materials like cat fur or velvet feel soft?
- If the universe is expanding, what is it taking the place of?
- Why do "cold" and "wet" textures feel so similar?
- Why do most medicinal pills have "-HCl" added to the end?
- How does Uranium Lead dating of crystals work?
- Why do electron holes move 2x slower than electrons?
- How do we know what the full milky way looks like?
- Plants know which way to grow because of gravity , so what happens if we plant one in space ?
- Do blind people see visuals on psychedelics?
- So if Lightbulbs are based on heating metal so that it gets excited and emits photons. Is the type of metal the difference between the type of photons? ex. xray vs regular light, or is it something like tungeston can emit any photon depending on weird stuff like heat and vaccum levels?
- What effectively renders a volcano inactive?
- Is there such thing as a double Gamma function similar to the Double Factorial?
- Do animals forget about their offspring over time?
- Is there a scientific explanation for why children and even adults are so preoccupied with ‘fair’?
- I run a current through a solenoid and get a magnetic force. I stick an iron core in the solenoid and get a bigger magnetic force. How is conservation of energy preserved?
- Are drought prone regions more vulnerable to wars and conflicts?
- How and When does fetus/infant/toddler get its guts colonized by "good" bacteria?
- how do you prove that 1+1=2?
- What makes something smell “bad”?
- How much more do we know about the 'ocean waves' on Titan?
- Why do some Con trails(the clouds planes leave behind) last much longer than others?
| What makes some materials like cat fur or velvet feel soft? Posted: 21 Mar 2018 10:12 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| If the universe is expanding, what is it taking the place of? Posted: 21 Mar 2018 08:16 PM PDT I'm having a hard time wrapping my head around the concept of an ever-expanding universe. If the volume of the universe is increasing, then what is outside of it? Where can the edges of the universe go if there is nothing on the other side? Also isn't space just nothing? How can nothing expand? And if there's nothing on the other side of space then how do we differentiate that nothing from the nothing that is our space? [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Why do "cold" and "wet" textures feel so similar? Posted: 21 Mar 2018 08:28 AM PDT Edit: thanks to the numerous commentors giving input on this question! [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Why do most medicinal pills have "-HCl" added to the end? Posted: 21 Mar 2018 08:34 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| How does Uranium Lead dating of crystals work? Posted: 22 Mar 2018 04:28 AM PDT Just watching Cosmos. It's the episode about finding the age of the earth. They explain that uranium decays to lead. We know the half life of lead. So if we measure the amount of lead and the amount of uranium, we can do some maths to find the age of a sample. So far so good. But then they say that the original readings for lead were too high. But how could they know that? Wouldn't the high readings for lead just mean that the age calculated would appear to be much higher? How do we know the acceptable range for the values for lead? Any help would be gratefully received. [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Why do electron holes move 2x slower than electrons? Posted: 21 Mar 2018 07:08 PM PDT Electron holes are just places in the lattice where electrons aren't present, so why is the carrier mobility around 2-3x less for electron holes compared to electrons? I never quite understood why. It obviously has massive effects in electronic design like VLSI gates and power electronics. [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| How do we know what the full milky way looks like? Posted: 21 Mar 2018 07:19 PM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Plants know which way to grow because of gravity , so what happens if we plant one in space ? Posted: 21 Mar 2018 03:42 PM PDT Do roots grow in all directions , or do they grow in a random direction which could make the plant grow in the ground , and the root going upward ( I consider upward is out of earth) [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Do blind people see visuals on psychedelics? Posted: 21 Mar 2018 07:19 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Posted: 22 Mar 2018 03:16 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| What effectively renders a volcano inactive? Posted: 21 Mar 2018 08:23 PM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Is there such thing as a double Gamma function similar to the Double Factorial? Posted: 21 Mar 2018 01:25 PM PDT After watching blackpenredpen's latest video I was motivated to try to derive an analytic function for double gamma that would extend the double factorial to non-integer numbers. Define the Double Gamma Function Γ² (x)=( 2^((x-1)/2) *Γ((x+1)/2)*sin²(π/2* x) + 2^(1-x/2)*Γ(x)/Γ(x/2)*cos²(π/2* x) ) / √( 1+k*sin²(πx) ) where k~0.0127996745295915 This has all the properties we want of the double factorial including: Here are values of x, Γ²(x+1) and Γ²(x+1)*Γ²(x)=Γ(x+1) for 0 to 7 incrementing by 0.5
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| Do animals forget about their offspring over time? Posted: 21 Mar 2018 02:10 PM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Is there a scientific explanation for why children and even adults are so preoccupied with ‘fair’? Posted: 21 Mar 2018 07:14 AM PDT I'm a teacher, and children seem to spend such a huge chunk of their time concerning themselves with other kids' affairs and whether the distribution of reward/punishment/attention is fair. Is this just in the way we raise kids or is there something more complex at work? [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Posted: 21 Mar 2018 02:11 PM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Are drought prone regions more vulnerable to wars and conflicts? Posted: 21 Mar 2018 07:18 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| How and When does fetus/infant/toddler get its guts colonized by "good" bacteria? Posted: 21 Mar 2018 05:34 AM PDT Does it happen before the birth? Or the bacteria come with mother's milk or later (external food)? How the initial 'colonization' happens? How kid's organism assures that these will be the "good" bacteria? [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| Posted: 21 Mar 2018 03:05 PM PDT in principia mathematica there are well over 100 pages explaining this, how exactly do you go on to explain 1+1=2 using hundreds of pages? [link] [comments]  | ||||||||||||||||||||||||||||||||||||||||||||||||
| What makes something smell “bad”? Posted: 21 Mar 2018 09:14 AM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| How much more do we know about the 'ocean waves' on Titan? Posted: 21 Mar 2018 05:13 PM PDT | ||||||||||||||||||||||||||||||||||||||||||||||||
| Why do some Con trails(the clouds planes leave behind) last much longer than others? Posted: 21 Mar 2018 04:57 PM PDT I live just a few miles from Tampa airport(TIA). Sometimes the trails last forever, but most times they go away quick. What causes it to to linger. Its like it's making it own cloud. [link] [comments]  |
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