My roommate washes his dishes immediately after eating with only water. How clean is the dish compared to using soap after letting the food set for a while? |
- My roommate washes his dishes immediately after eating with only water. How clean is the dish compared to using soap after letting the food set for a while?
- How worried should we be about the Clathrate Gun?
- What keeps the protons in the nucleus of a atom from repelling each other?
- How much of an issue to sattlelites/ISS/rockets is man-made space junk? Is there anything really we can do to "clean up" orbiting trash?
- Can a blind person experience photic sneeze reflex?
- Why does Alcohol relieve pain?
- Why will subtracting a number by its inverse always give an answer divisible by 9?
- Why did people think that clones would age faster than normal?
- If the arctic habitat for polar bears is disappearing, why don't we relocate them to the antarctic?
- What is the path of electrical current flowing in this gif? Why does it burn the wood in this pattern?
- Is atmospheric noise truly random?
- Would a box of photons have mass and therefor be "heavy"?
- What holds a chunk of an substance together?
- What makes low mass brown dwarfs different from gas giants?
- Does Gravitational Potential Energy Increase an Objects Weight?
- Is the change in observed frequency from the Doppler Effect different for when the sound source is moving than from when the observation point is moving?
- How do candle wicks stay lit?
- Is there one origin of sexual reproduction, or more? What creatures have sexes homologous to humans?
- How do organisms survive underwater pressures that humans cannot survive?
- Why do organic processes like RNA synthesis make mistakes?
- What is the storage capacity of the human brain?
- How can I produce a flat and full spectrum light source?
- How do we get the first distance of a celestial object without having an other one?
| Posted: 26 Jul 2016 08:40 PM PDT |
| How worried should we be about the Clathrate Gun? Posted: 27 Jul 2016 07:08 AM PDT Year after year is becoming hotter than the next. Scientists are being 'caught off-guard' by record temperatures. Natalia Shakhova says we may have only DECADES before things get really bad. This thread yesterday really scared the shit out of me. Are things really this dire? Could the human race be gone in less than 100 years? [link] [comments]  |
| What keeps the protons in the nucleus of a atom from repelling each other? Posted: 27 Jul 2016 03:39 AM PDT In chemistry, we were taught it has do do with the quarks and gluons, but didn't get much deeper than that. How exactly do these quarks and gluons peek the protons together? [link] [comments]  |
| Posted: 26 Jul 2016 08:17 PM PDT |
| Can a blind person experience photic sneeze reflex? Posted: 26 Jul 2016 08:14 PM PDT |
| Why does Alcohol relieve pain? Posted: 26 Jul 2016 07:40 PM PDT Obviously "because it gets you drunk", but what specifically about ethanol gives it analgesic effects at the level of the the CNS/brain? [link] [comments]  |
| Why will subtracting a number by its inverse always give an answer divisible by 9? Posted: 27 Jul 2016 05:49 AM PDT |
| Why did people think that clones would age faster than normal? Posted: 26 Jul 2016 06:50 PM PDT I saw the story about Dolly the sheep's clones aging well, and wondered where the theory the clones aged at an accelerated rate came from? Is there any scientific evidence to back it up? [link] [comments]  |
| If the arctic habitat for polar bears is disappearing, why don't we relocate them to the antarctic? Posted: 26 Jul 2016 08:00 PM PDT Are there specific conditions that would unsurvivable to them in the south? Or would it just be too disruptive to the antarctic ecosystem? [link] [comments]  |
| Posted: 26 Jul 2016 07:28 PM PDT Apologies if this has been asked before but I did not see anything when I searched. This gif was recently posted in /r/gifs. As you can see, a battery is supplying current to a piece of wood, and the electricity is burning the wood. The gif was described as the current "finding" the path of least resistance. It's been a while since I've taken an electronics course, but I am familiar enough with the basics of circuits. However, and this may not have been the intention, it seemed like the post was suggesting that the slow burning in the gif was the slow movement of current. This seems incorrect to me since current would start flowing when the circuit was closed, and current would have to be flowing first in order for the wood to burn. But what is the path of the current? Why does the wood burn with this pattern? Some people tried to address these questions in the original post in /r/gifs, but some of the proposed explanations seemed a little pseudoscientific so I wanted to see what everyone here thought. [link] [comments]  |
| Is atmospheric noise truly random? Posted: 26 Jul 2016 11:26 PM PDT Many PRNGs say that one of the ways to get true randomness is through processing atmospheric noise. However, my question is, would we ever come to the point where we could predict how atmospheric molecules interact with each other in at least a closed chamber? Or is it completely random and unpredictable? The same question applies to the randomness of radioactive materials. [link] [comments]  |
| Would a box of photons have mass and therefor be "heavy"? Posted: 27 Jul 2016 12:31 AM PDT From Wikipedia: "When two or more photons move in different directions, however, a center of mass frame (or "rest frame" if the system is bound) exists. Thus, the mass of a system of several photons moving in different directions is positive, which means that an invariant mass exists for this system even though it does not exist for each photon." Essentially a system of multiple photons has a rest mass, even though individual photons don't. I understand this, but would this system be "heavy" in normal terms? Would it be pulled on by gravity like any other massive body is? [link] [comments]  |
| What holds a chunk of an substance together? Posted: 26 Jul 2016 07:09 PM PDT I know there are 4 fundamental forces (gravity, electromagnetism, strong and weak nuclear). When I pick up a solid chunk of iron or gold or something, which force keeps that piece together as one piece. Why does it not just fall apart as a jumble of individual molecules? Also, when I take 2 pieces of iron and touch them to each other, what force keeps them separate? Why do they not just fuse into one piece of iron? [link] [comments]  |
| What makes low mass brown dwarfs different from gas giants? Posted: 26 Jul 2016 07:43 PM PDT |
| Does Gravitational Potential Energy Increase an Objects Weight? Posted: 27 Jul 2016 02:59 AM PDT if a compressed spring weighs more because it has more potential energy does an object weigh (very very slightly) more the higher it is as it has more gravitational potential energy? [link] [comments]  |
| Posted: 26 Jul 2016 07:25 PM PDT Hope that title makes sense. I ask because this came up in my physics class today when we were doing the Doppler Effect. We were using the formula f'=f[(V+Vo)/(V-Vs)] where f' is the observed frequency, f is the original frequency emitted from the source, V is the speed of the wave through the fluid, Vo is the speed at which the observer moves toward the source of the sound, and Vs is the speed at which the sound source moves toward the observer. When you use speeds of say,
it gives three different frequencies. Is this correct? If yes why is it so? Why does the frequency change depend on whether the source of the sound is moving or whether the observation point is moving? [link] [comments]  |
| Posted: 26 Jul 2016 05:29 PM PDT |
| Is there one origin of sexual reproduction, or more? What creatures have sexes homologous to humans? Posted: 26 Jul 2016 07:53 PM PDT There are bzillions of creatures which exhibit sexual reproduction, but it's not always implemented in the same way- in some fungi, they have hundreds of 'mating-types' (and even if there's just two, we seem to refrain from calling them 'male' and 'female'). This makes me want to ask: 1) How many times has sexual reproduction evolved? 2) What groups of life share a sexually reproducing ancestor with humans? 3) Of the kinds of creatures listed in 2), is the divide between male/female homologous? A human female is probably homologous with a female bison ... but is it homologous with a female shark or a male shark? A female bee? A female octopus? A female flower? [link] [comments]  |
| How do organisms survive underwater pressures that humans cannot survive? Posted: 26 Jul 2016 05:45 PM PDT |
| Why do organic processes like RNA synthesis make mistakes? Posted: 26 Jul 2016 10:54 AM PDT My phrasing probably isn't the best here, apologies. But suppose I'm relating these processes to those of a computer. Without some sort of external factor or human error somewhere down the line, a computer doesn't simply "stop working" or perform a calculation incorrectly. There's always a cause for whatever error occurs. So I guess what I'm wondering is, what kinds of causes lead to these "errors" in the basic processes of living organisms? I've been taught that mistakes in DNA/RNA coding lead to mutations, which lead to genetic variation. But surely mistakes don't just happen without reason? [link] [comments]  |
| What is the storage capacity of the human brain? Posted: 26 Jul 2016 05:43 PM PDT Assuming knowledge, memories, etc all take up space in the brain, I'm led to believe there is a limit. We all know that nobody, or at least most people, do not remember literally everything that happens in their lifetimes. Disregarding that, at what point would your brain be .. full? [link] [comments]  |
| How can I produce a flat and full spectrum light source? Posted: 26 Jul 2016 02:17 PM PDT Complementing the title: A light with a precisely known spectral power distribution function also works. Long story short: I'm trying to precisely profile the spectral response of my camera. For that I pretend to use raw data from the photograph of a spectrum from a descomposed white light. But, my white light must be either totally flat or must have a spectral power distribution that follows a precise function, so i can compensate for that in my data later. One of the problems is that i don't know if a filament lamp has a very precise temperature. How could i properly measure the temperature of the filament, so i can calculate the spectral power distribution function from the black body radiation function? Thanks! [link] [comments]  |
| How do we get the first distance of a celestial object without having an other one? Posted: 26 Jul 2016 02:22 PM PDT |
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