- Do heavily forested regions of the world like the eastern United States experience a noticeable difference in oxygen levels/air quality during the winter months when the trees lose all of their leaves?
- If I were to release oxygen into the vacuum of space where would it go?
- Why are there so many types of cables?
- Why don't they use jet engines for the first stage of rockets?
- why does placebo work?
- Why do your hearing get slightly reduced when you yawn?
- How did the Apollo lunar transfer stages end up in a solar orbit?
- Do astronauts have difficulties with swallowing and digestion?
- How do moving electrically charged particles cause magnetism?
- Is electricity affected by gravity?
- Why is the land around Mt Fuji so flat?
- Can gas vehicles be converted to electrical, on mass, efficiently?
- Why are there layers of clouds in the sky?
- Is it possible to fire a bullet around the earth using only the force of the initial blast?
- Where do scientists get so many mice with cancer for their cancer research?
- Is the rate of decrease in the Equatorial Bulge significant in relation to sea level rise?
- How close do stars have to be before they're considered a binary system?
- Why can some properties (super magnetism, quantum entanglement, etc) currently only work efficiently in the extreme cold?
- Has the expansion rate of the universe always been strictly increasing?
- Why don’t thunderstorms occur in the snow?
- Why can we feel cramps or stomach aches? Do we have nerve endings inside of our body?
- Is there any limitation to scaling flux pinning?
- How is electricity transferred from clouds despite air being a insulator?
- What determines the height and volume of clouds?
| Posted: 15 Feb 2018 06:11 PM PST |
| If I were to release oxygen into the vacuum of space where would it go? Posted: 15 Feb 2018 02:34 PM PST Would it just float, would it be attracted to the strongest gravitational field, would it compress? In the case it floats would I be able to breath in space if I were standing in it? [link] [comments]  |
| Why are there so many types of cables? Posted: 16 Feb 2018 06:11 AM PST Why aren't all cables just the positive and negative wires side by side? What is the advantage of having coaxial cables and such? [link] [comments]  |
| Why don't they use jet engines for the first stage of rockets? Posted: 16 Feb 2018 07:26 AM PST I just learnt about specific impulse and how the specific impulse of jet engines is much higher because they don't have to carry their own oxygen. And that made me think; why don't they use jet engines for the first stage, when there's still oxygen around? Wouldn't that be much more efficient? [link] [comments]  |
| Posted: 15 Feb 2018 08:32 AM PST |
| Why do your hearing get slightly reduced when you yawn? Posted: 16 Feb 2018 04:50 AM PST |
| How did the Apollo lunar transfer stages end up in a solar orbit? Posted: 15 Feb 2018 03:16 PM PST After the lunar injection burn, the Apollo crew and the transfer stage were on a free return trajectory. Why didn't the stage slingshot around the moon and burn up in Earth's atmosphere? [link] [comments]  |
| Do astronauts have difficulties with swallowing and digestion? Posted: 15 Feb 2018 12:12 PM PST Would weightlessness mean that food and water floats around inside your body, making digestion hard? If so, how is it dealt with? [link] [comments]  |
| How do moving electrically charged particles cause magnetism? Posted: 16 Feb 2018 03:28 AM PST I understand that magnetism and electricity are 2 side of the same coin and that one causes the other. But why? How come an electric current create a force that isn't in the direction of the momentum of the electrons? [link] [comments]  |
| Is electricity affected by gravity? Posted: 15 Feb 2018 01:13 PM PST |
| Why is the land around Mt Fuji so flat? Posted: 15 Feb 2018 04:53 PM PST I have seen pictures and topo maps of Mt Fuji (https://goo.gl/maps/GuWNF7kGGso), and the land surrounding the mountain is impressively flat, then impressively mountainous. Is this unusual? How does this happen? [link] [comments]  |
| Can gas vehicles be converted to electrical, on mass, efficiently? Posted: 16 Feb 2018 03:04 AM PST With recent advances in electric vehicles, and several governments committing to the elimination of fossil fuel use, I'm reminded of the period of time where cars were converted from leaded to unleaded petrol. I remember my parents having to get a catalytic convertor fitted at their expense. Is this type of conversion something we should expect to see soon? And if so, is it going to be remotely affordable for the masses? [link] [comments]  |
| Why are there layers of clouds in the sky? Posted: 15 Feb 2018 09:53 AM PST I noticed this while flying. There's one main layer of clouds but multiple layers above it. Are these not clouds of water? Or does water condense into clouds at different heights depending on pressure and temperature? [link] [comments]  |
| Is it possible to fire a bullet around the earth using only the force of the initial blast? Posted: 15 Feb 2018 11:13 PM PST So i was thinking, rockets can travel around the earth, but they use a propulsion system. So i was wondering if it is possible for a bullet to do the same utilizing nothing but the initial blast, gravity, and the wind. It wouldn't matter how big it would have to be or what shape or how big of a blast is needed, just if it is possible at all. [link] [comments]  |
| Where do scientists get so many mice with cancer for their cancer research? Posted: 16 Feb 2018 04:11 AM PST And how do you force a mice to have cancer in first place? [link] [comments]  |
| Is the rate of decrease in the Equatorial Bulge significant in relation to sea level rise? Posted: 16 Feb 2018 03:08 AM PST I just went down the rabbit hole reading about the Equatorial bulge. Given that the earth's rotation is slowing minutely, is the decrease in the 21 km Equatorial bulge significant enough to make any noticeable difference in sea level rise at the equator? Edit: double word [link] [comments]  |
| How close do stars have to be before they're considered a binary system? Posted: 15 Feb 2018 08:53 PM PST Perhaps a better way to ask would be how far apart can they get before their gravity no longer affects each other? I bet these values differ given masses and all, but is there a rough average? [link] [comments]  |
| Posted: 15 Feb 2018 11:05 PM PST |
| Has the expansion rate of the universe always been strictly increasing? Posted: 15 Feb 2018 05:57 PM PST To explain what I mean: I've been told the universe began with a period of ultra-rapid expansion. I've also been told that the universe is still expanding today and at an accelerated rate. The use of 'ultra-rapid' gives me the impression that it was expanding faster in the past than it is now, but this seems to imply the acceleration slowed at some point to reach the current rate. I've read all the questions in the FAQ on expansion, which confirms the parts that are confusing me but doesn't seem to discuss the rate of change in acceleration (or if it did I couldn't find or understand it). One part of the FAQ says "the Universe was left expanding ever since [the big bang]" while another part says the universe was "expanding far FAR FAR faster than it does now" So did the acceleration start ultra-rapid, slow down, and increase again? If not, what's actually going on? If so, when did the slowdown happen, and could it happen again? I have only a high-school level understanding of space science, please consider my education level when writing your response. [link] [comments]  |
| Why don’t thunderstorms occur in the snow? Posted: 15 Feb 2018 09:27 PM PST Does it have something to do with the freezing temperatures? [link] [comments]  |
| Why can we feel cramps or stomach aches? Do we have nerve endings inside of our body? Posted: 15 Feb 2018 02:29 PM PST |
| Is there any limitation to scaling flux pinning? Posted: 16 Feb 2018 01:01 AM PST I read the Wikipedia about flux pinning and as far as I could tell, there were none. I'm a complete layman, so it's possible I might have missed something. By scaling, I mean: 1. Most Youtube videos take a magnet and a type 2 superconductor and have the former levitate over the latter. So can a super-strong magnet achieve stronger effects? Like can a Florida Bitter design be super strong? 2. Can the size of the setup of such a levitating experiment have any limits? As I already mentioned, I'm a complete layman, so I'd appreciate it if you broke the limitations, if any, into simpler terms. [link] [comments]  |
| How is electricity transferred from clouds despite air being a insulator? Posted: 16 Feb 2018 12:54 AM PST |
| What determines the height and volume of clouds? Posted: 16 Feb 2018 12:50 AM PST How come some clouds are much higher than others and why is it that some clouds are feather like while some are really fluffy? [link] [comments]  |
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