If light can travel freely through space, why isn’t the Earth perfectly lit all the time? Where does all the light from all the stars get lost? |
- If light can travel freely through space, why isn’t the Earth perfectly lit all the time? Where does all the light from all the stars get lost?
- Why does space have three dimensions but time has only one?
- Is it possible to cause water to boil/freeze using exo/endothermic chemical reactions?
- What is the environmental impact of cryptocurrency mining?
- Is water the wettest liquid? Is there a liquid wetter than water?
- Can a body be in such a shape that it has no centre of mass?
- Would our solar system look any different if the sun took longer to ignite and begin nuclear fusion?
- Does it take a computer more time or resources to compute 17*7 compared to 2*3?
- What causes a volcano to ash?
- What makes platinum so good as a catalyst for fuel cells?
- How common are black holes?
- Does turning a CFL on and off use more electricity than leaving it on for a few minutes? What's the general rule of thumb?
- Where can I find a comprehensive list of all asteroids ever identified and catalogued?
- What is the difference between gravity and gravitational waves? And how does gravity travel?
- Are electrons literally flowing through my computer?
- What is the longest nerve in the human body, anatomically speaking?
- What combinations of frequencies and harmonics do musical instruments create?
- Is the air quality in major cities today worse than cities in the early 20th century like Birmingham which were industrial hubs?
- How does chemically and thermally strengthening glass change the structure of the material?
- Does an increase in energy also increases the amount of entropy in a system?
- What is the coolant in a nuclear reactor and how much pressure must it be under to persist as liquid?
| Posted: 26 Nov 2017 10:22 PM PST |
| Why does space have three dimensions but time has only one? Posted: 26 Nov 2017 09:36 AM PST |
| Is it possible to cause water to boil/freeze using exo/endothermic chemical reactions? Posted: 26 Nov 2017 04:41 PM PST |
| What is the environmental impact of cryptocurrency mining? Posted: 26 Nov 2017 02:12 PM PST Most of what I have seen is simply the raw power consumption of the processing, but there is also cooling, fabrication and other costs that would also need to be considered. [link] [comments]  |
| Is water the wettest liquid? Is there a liquid wetter than water? Posted: 27 Nov 2017 04:29 AM PST |
| Can a body be in such a shape that it has no centre of mass? Posted: 27 Nov 2017 06:49 AM PST Can the distribution of mass of a body, or its shape mean that there is no centre of mass for it? or is there always a centre of mass? [link] [comments]  |
| Would our solar system look any different if the sun took longer to ignite and begin nuclear fusion? Posted: 26 Nov 2017 09:13 PM PST If the sun took, lets say another 10-50 million years to begin nuclear fusion, what affect would that have had on the development of our solar system? [link] [comments]  |
| Does it take a computer more time or resources to compute 17*7 compared to 2*3? Posted: 27 Nov 2017 04:08 AM PST Also, if I keep increasing the first pair of numbers, at what point will the difference be significant? [link] [comments]  |
| Posted: 26 Nov 2017 09:08 PM PST I was watching a video on the reception eruption of a volcano in Bali and it got me thinking, if there's no organic material like vegetation to burn inside the crater, what causes a volcano to ash, or is it just hot dust? [link] [comments]  |
| What makes platinum so good as a catalyst for fuel cells? Posted: 26 Nov 2017 09:39 AM PST |
| Posted: 26 Nov 2017 10:38 PM PST From school It sounded like black holes form from nearly all collapsed stars. How much mass is required to form a black hole? How many of them are in our galaxy? How many orbit in our galaxy? [link] [comments]  |
| Posted: 27 Nov 2017 01:21 AM PST My father-in-law installed some new CFL lamps in his home. I noticed some rooms where they were still on even though we hadn't been in that room for over 30 minutes. He responded to this by saying something like : "CFL lamps use much less energy if you leave them on for an hour than turning them off and on". [link] [comments]  |
| Where can I find a comprehensive list of all asteroids ever identified and catalogued? Posted: 26 Nov 2017 07:54 PM PST I found a few sources but they are all only NEO specific or special catalogs like light inversion studies. [link] [comments]  |
| What is the difference between gravity and gravitational waves? And how does gravity travel? Posted: 27 Nov 2017 06:47 AM PST So I have read the ask reddit post in which someone asked about the best astronomy fun facts. Someone said that if the sun gets removed we still get to feel the gravity for 8 minutes, because the speed of light is the fastest rate at which information can travel. After that there was a lot of confusion about gravity and gravitational waves in the comments. Can someone explain it to me please? Thanks a lot! [link] [comments]  |
| Are electrons literally flowing through my computer? Posted: 27 Nov 2017 06:47 AM PST So, the analogy I learned is that electricity is "created" when a magnet crosses a wire in motion. But, that can't possibly be creating new electrons...right? It's just exciting the electrons that are in the wire already (so I understand). But if that's true, and the electrons flowing through my computer started in a wire from a turbine, wouldn't that wire eventually run out of electrons (assuming that turbine is powering the whole city?) I never hear about wires 'wearing out' in this way. This leads me to believe that electrons are not literally flowing through my computer, (because if they were, the source of the electrons would be depleted eventually) but if they're not, what is? [link] [comments]  |
| What is the longest nerve in the human body, anatomically speaking? Posted: 26 Nov 2017 11:55 PM PST Saw a related question on here and I started wondering: the sciatic nerve, which is meant to be the longest because it reaches the feet, terminates at the apex of the popliteal fossa. So what is the actual answer? Is it still considered to be the sciatic nerve because its axons technically extend to the feet? I've seen different answers, with some sources saying vagus and others saying the ulnar or radial. In addition, what are the longest axons? Is it those of dorsal root ganglia? [link] [comments]  |
| What combinations of frequencies and harmonics do musical instruments create? Posted: 27 Nov 2017 05:44 AM PST I'm currently writing a physics essay about frequencies of notes and chords. For the experimental part of the essay, I'm analysing the frequencies produced by said notes and chords with a Fast Fourier Transform. When playing an A4 note, for example, I see all the harmonics of the A note, as expected. However, I'm also seeing a bunch of frequencies belonging to completely different notes. Here's a picture. How can this be explained? It is possible that I'm analysing the FFT data completely wrong, so keep that in mind. [link] [comments]  |
| Posted: 26 Nov 2017 03:56 PM PST |
| How does chemically and thermally strengthening glass change the structure of the material? Posted: 26 Nov 2017 03:37 PM PST What does chemically and thermally strengthening do to the amorphous structure of glass? Im trying to think how or even if the structure would change or if it would just change the compression and tension forces. [link] [comments]  |
| Does an increase in energy also increases the amount of entropy in a system? Posted: 26 Nov 2017 09:03 PM PST |
| Posted: 27 Nov 2017 12:36 AM PST Just found myself wondering about this. On a previous /askscience question, u/RDS-37 posted this gif when explaining how the water moving the turbines is not irradiated. So the pressuriser keeps the coolant as liquid, but what sort of pressures are involved and how it is safely maintained? [link] [comments]  |
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