We have hot air balloons, and helium balloons but why not hot helium balloons? |
- We have hot air balloons, and helium balloons but why not hot helium balloons?
- Instead of other animals transmitting diseases to humans.. what diseases can humans transmit to other types of animals?
- Will the asteroids in the asteroid belt eventually clump together and form another planet?
- Is it possible for Gas Giants planets to be normal planets but with very high density atmosphere ?
- When you drop a rock into a pool of water, is there a way to predict the pitch of the sound that is made?
- How unique is our solar system?
- Why does this two-photon system have mass?
- Does it take more energy to heat something up or cool something down, or does it take the same amount?
- What is the closest two planets can come near each other without actually crashing into each other?
- If irrational numbers cannot be expressed as fractions, then why can we measure pi as circumference/diameter?
- Mars seems like a stupid "Last Resort"... Do we have better options?
- How is the Bekenstein bound reconciled with the apparent real number nature of the universe?
- Is the Earth spinning at a constant velocity?
- Is a black hole the highest state of entropy that can occur? (that we know of)
- Circular haze around moon during night?
- What causes the cyclical temperature variation over the holocene?
- If Earth made it's rotation in half the amount of time would the effect of gravity be felt less?
- Is it possible to block out the sun from Earth using a dinner plate?
- Why do so many electronic devices have transformers (or "power supply bricks") at the end of the cord where they plug into the wall/power strip, rather than in the middle of the cord?
- How is outside temperature determined? My Mom's outside thermometer is in the sun and always shows hotter than what the weather reports state.
- Is a kugelblitz a direct result of energy mass equivalance?
- Before Einsteins E=mc^2, how did people explain the sun/stars shining?
- Do anti-matter-blackholes exist?
| We have hot air balloons, and helium balloons but why not hot helium balloons? Posted: 17 Jun 2016 03:54 AM PDT I know that suggesting Hot Hydrogen is a no-no, but wouldnt heating helium provide more lift than traditional methods or is there something I am missing here? I know heating helium would not be as simple as heating air obviously, but Im sure there is a way. [link] [comments]  |
| Posted: 16 Jun 2016 09:21 PM PDT |
| Will the asteroids in the asteroid belt eventually clump together and form another planet? Posted: 17 Jun 2016 04:33 AM PDT Currently cramming revision for physics, and just kinda interested. [link] [comments]  |
| Is it possible for Gas Giants planets to be normal planets but with very high density atmosphere ? Posted: 17 Jun 2016 02:52 AM PDT And can there be life under this atmosphere but are undetectable to us ? [link] [comments]  |
| Posted: 16 Jun 2016 05:52 PM PDT |
| How unique is our solar system? Posted: 16 Jun 2016 09:33 PM PDT How does our solar system compare to others that we have discovered? I understand there to be a mix of planets, stars etc. but what about size or orbits? I would actually like to know for a story I am writing. From Google I have found that it takes 5.3 hours for light from the sun to reach Pluto as the most distant planet (or whatever you wish to call it). How might other planetary systems compare? How might they be similar or different? [link] [comments]  |
| Why does this two-photon system have mass? Posted: 16 Jun 2016 07:08 PM PDT Consider a system of two equal energy photons traveling antiparallel from one another. The net momentum of this system is zero. Therefore, given E2 - P2 = m2 (taking c to be equal to 1) with P = 0, we have E2 = m2 yielding E = m for this two photon system. Does this have any physical significance? [link] [comments]  |
| Posted: 16 Jun 2016 04:33 PM PDT |
| What is the closest two planets can come near each other without actually crashing into each other? Posted: 16 Jun 2016 07:27 PM PDT I got the idea for the question from Futurama where the planet Mars flies by earth close enough for people on Mars to jump to Earth. Obviously that's absurd but it did make me wonder. [link] [comments]  |
| Posted: 16 Jun 2016 07:51 PM PDT |
| Mars seems like a stupid "Last Resort"... Do we have better options? Posted: 17 Jun 2016 06:50 AM PDT So this Mars colonisation thing that has been in the works in the last few years seems to me like it's doomed to fail. I mean compare the amount of water on Mars to the amount of water on Earth. It doesn't seem like it's got much potential. My question isn't really bashing on the project, but instead: Do we in fact have any other reliable options for colonisation? Obviously nothing else in our solar system, but in the next couple of centuries are we predicted to have the technology for further space travel? Do we know of other planets that mighthave similar water content, atmosphere, size, climats, etc? The whole thing is so deep and complex but it facinates the fuck out of me. Thank in advance if you answer :) [link] [comments]  |
| How is the Bekenstein bound reconciled with the apparent real number nature of the universe? Posted: 16 Jun 2016 08:42 PM PDT My understanding was that experiments such as the Lorentz invariance results achieved by Fermilab in 2009 put the minimum "pixel size" for the universe (if the universe is discrete at all) to well below the Planck length. Doesn't this imply that the information needed to store even the position/velocity of a single photon would be higher than the Bekenstein bound for a volume enclosing it? Is there a contradiction here? If not, why not? [link] [comments]  |
| Is the Earth spinning at a constant velocity? Posted: 16 Jun 2016 07:10 PM PDT If it is, how can it maintain a constant velocity? If not, does it oscillate around a certain velocity? Is it accelerating or decelerating? And from where does the spinning arise in the first place? [link] [comments]  |
| Is a black hole the highest state of entropy that can occur? (that we know of) Posted: 16 Jun 2016 11:07 AM PDT I was reading The Life of the Cosmos by Lee Smolin, and this is how he explained Bekenstein's dicovery.
What is the biggest region that one can assert? Would the entropy of a region/system that contains the emissions of a "decayed" black hole have a higher entropy than it did while the black hole still existed? I am not smart enough for this shit. [link] [comments]  |
| Circular haze around moon during night? Posted: 17 Jun 2016 05:19 AM PDT (8:30PM in the southern hemisphere. Sydney, Australia) Ok so I was coming back from the park during the night and I looked up and saw a perfect circular haze/glowing and the moon right in the middle. You can distinctly see this circle. What is happening? [link] [comments]  |
| What causes the cyclical temperature variation over the holocene? Posted: 16 Jun 2016 09:41 PM PDT In temperature reconstructions from ice cores, you get something a bit like this. CO2 goes from about 200 to about 280, which is about 0.48 doublings. If the ECS is about 3°C per doubling, then due to the change in CO2, we should be seeing about 1.5°C of temperature increase. What is causing the other 9°C of warming? [link] [comments]  |
| If Earth made it's rotation in half the amount of time would the effect of gravity be felt less? Posted: 17 Jun 2016 04:25 AM PDT |
| Is it possible to block out the sun from Earth using a dinner plate? Posted: 17 Jun 2016 01:13 AM PDT The precise question is - is there a particular point in space where you could put a dinner plate, or something of dimilar size, that would completely stop any light hitting the earth? I understand things move a lot and at high speeds so I understand the plate would have to also move if it were to attempt to continue to completely block the sun from Earth [link] [comments]  |
| Posted: 16 Jun 2016 08:35 PM PDT So many devices, from my computer to my phone charger to my wifi router, have massive bricks at the part where they plug into the wall, and wind up covering other outlets. I'm probably not the only person who's been frustrated by this. I know it's possible to not do this, since other devices, like my Xbox or Macbook, have transformers in the middle of the cord, with another bit of cord that plugs into one socket and doesn't block anything else. Why don't all devices do this? [link] [comments]  |
| Posted: 17 Jun 2016 12:01 AM PDT The other day we were talking and I said it was only supposed to be around 76°F outside. She looked at her outdoor thermometer and said it's almost 91°F. [link] [comments]  |
| Is a kugelblitz a direct result of energy mass equivalance? Posted: 16 Jun 2016 08:11 PM PDT |
| Before Einsteins E=mc^2, how did people explain the sun/stars shining? Posted: 16 Jun 2016 09:42 AM PDT |
| Do anti-matter-blackholes exist? Posted: 16 Jun 2016 03:47 PM PDT and will happen if a hypothetical anti-matter-blackhole merges with a normal one? [link] [comments]  |
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