Why haven’t black boxes in airplanes been engineered to have real-time streaming to a remote location yet? |
- Why haven’t black boxes in airplanes been engineered to have real-time streaming to a remote location yet?
- If I stand 5ft away from a mirror and look at my reflection, do my eyes focus on an object that is 5th away, or 10ft away?
- Is the sun just gas or does it have a solid surface?
- Why is Iran so heavily forested in the north?
- Is satellite (and satellite debris) overcrowding in orbit around Earth a serious cause for concern in the not too distant future?
- Scientists seem to disagree about the rate of the expansion of the universe, it is possible that the rate is different depending on location?
- How does a neutron turn into a proton and an electron when the atom is releasing beta rays?
- Coffeemug + spoon: why does the pitch keep rising?
- Why does alcohol/drug tolerance significantly increase with regular consumption of it?
- What's the difference between a nebula and a supernova?
- Why do some places only have 2 tidal changes per day as opposed to 4?
- How did the sr 71 fly at such high altitudes with air fed engines?
- What happens to the light energy emitted from a light source, say a light bulb in a room? Where does it go?
- What makes a dish microwave safe?
- Measuring Porosity for GDLs? Help!
- When a zygote is dividing, how is it able to tell which part of it will become the head and what part will become the bottom?
- If the poles of the earth are so cold because they are the furthest from the sun, would that mean the earth would be to cold for life if it was one “earth” further away and to hot if it was one earth closer?
- How much do we know about Ceres?
- How are electromagnetic waves from WiFi able to penetrate walls when visible light waves can’t?
- Question about municipal water supplies and waste - what percentage of initial supply is returned?
- How does software turn off a computer?
- What makes some pains require opioids or stronger, but others can be taken care of with Tylenol or ibuprofen?
Posted: 09 Jan 2020 01:09 PM PST Why are black boxes still confined to one location (the airplane)? Surely there had to have been hundreds of researchers thrown at this since 9/11, right? [link] [comments] |
Posted: 09 Jan 2020 08:14 PM PST Obviously the mirror is 5ft away, but does the illusion of depth cause one's eyes to focus on their own reflection as if it is twice the distance that they are from the mirror? [link] [comments] |
Is the sun just gas or does it have a solid surface? Posted: 09 Jan 2020 02:08 PM PST |
Why is Iran so heavily forested in the north? Posted: 09 Jan 2020 11:41 AM PST Looking at google maps, Iran seems to have a stark change in it's climate and ecology just north of Tehran. What causes this? [link] [comments] |
Posted: 10 Jan 2020 05:54 AM PST |
Posted: 10 Jan 2020 06:45 AM PST When something explodes, seemingly not all matter is ejected at the same rate. Since the Big Bang was the literal mother of all explosions, would this observation also apply and instead of the universe expanding unformly as a sphere, it would take an irregular shape with different parts expanding at a different rate? [link] [comments] |
How does a neutron turn into a proton and an electron when the atom is releasing beta rays? Posted: 10 Jan 2020 02:06 AM PST I understand that a neutron is built up by quarks and that the quark configuration can change into a proton, but how does it also turn into an electron? I thought electrons weren't made of quarks? [link] [comments] |
Coffeemug + spoon: why does the pitch keep rising? Posted: 10 Jan 2020 07:34 AM PST So me and my dad have been wondering for some time now why the pitch of the spoon ticking keeps rising and rising until we rinse the cup and start over again. Please watch the video for better understanding of my question. https://drive.google.com/file/d/1-hN8tKj7fSq0FO0WHo9a4CmxxGrduMtl/view?usp=sharing I personally think the molecules inside the ceramic structure keep getting excited more and more thus creating higher frequencies, but I'd love to hear your theories. [link] [comments] |
Why does alcohol/drug tolerance significantly increase with regular consumption of it? Posted: 09 Jan 2020 12:03 PM PST |
What's the difference between a nebula and a supernova? Posted: 10 Jan 2020 07:55 AM PST |
Why do some places only have 2 tidal changes per day as opposed to 4? Posted: 09 Jan 2020 01:21 PM PST A friend of mine stays in thailand at the moment, and told me, that high and low tide only occured once per day. I was very doubtful and suspected false observation (tidal change during night time or something like that), since i know from holidays at the sea that two high tides appear each day. But she was insisting her observation is correct, so I checked and apperently she is right: Koh Chang, one high tide per day: https://www.tidetime.org/asia/thailand/ko-chang-tai.htm Kiel, Germany (a place I´m familiar with): 2 high tides a day: https://www.tidetime.org/europe/germany/kiel.htm Can someone explain this difference to me? [link] [comments] |
How did the sr 71 fly at such high altitudes with air fed engines? Posted: 09 Jan 2020 08:19 PM PST know a fair bit about planes but there is a very small amount of oxygen at the cruising altitude of the sr 71 so I was wondering how it could be able to fly at that altitude with air fed engines? [link] [comments] |
Posted: 10 Jan 2020 07:33 AM PST |
What makes a dish microwave safe? Posted: 09 Jan 2020 07:14 PM PST All of my dishes seem to me to be ceramic. Yet, some dishes in my cabinet handle the microwave great - the food gets hot, the dish doesn't. Other dishes get terribly hot in the microwave and I have to take precautions just to not burn my hands. Can anyone help me understand what's different about the dish in these two scenarios. What makes one so much better dealing with heat in the microwave while the other does terribly? [link] [comments] |
Measuring Porosity for GDLs? Help! Posted: 10 Jan 2020 04:15 AM PST Hellow fellow nerds, Not sure if this is the right place to post, but here we go. I have a lot of samples for a Proton Electrolyte Membrane Fuel Cell, mainly the Gas diffusion layer (GDL) and the corresponding catalyst layer (CL). I have measured contact angles and morphology using SEM, at which I did a script that could calculate pores and porosity based on the morphology of a front view of the samples. However, the system is rather complex and I would need other types of microscopy methods to obtain better results, so I disregarded this method. I read about using a densitometer, but it is not available on site. Then I thought if it is possible to find the porosity using a normal weighting scale. First dry the sample and record the weight (m_dry). Then submerging the sample (of known volume) into a hydrophobic liquid, let it saturate and then blow away any liquid that resides on the outside. Then weight this again, record the weight as m_tot. Finally, the weight of the liquid residing in the pores should be m_liq = m_tot - m_dry This can be converted into the volume (V_liq) residing in the pores and finally the porosity (P) can be calculated as P = (V_liq - V_dry)/V_dry * 100% However, I am not sure if any liquid evaporates during transfer and weighting. Is this idea totally off or does it seem reasonable? Thanks for your advice! [link] [comments] |
Posted: 09 Jan 2020 04:47 PM PST And to add to this, how does it know which cells will specialize into what? [link] [comments] |
Posted: 10 Jan 2020 03:10 AM PST |
How much do we know about Ceres? Posted: 09 Jan 2020 07:12 PM PST |
How are electromagnetic waves from WiFi able to penetrate walls when visible light waves can’t? Posted: 09 Jan 2020 04:58 PM PST Both are just types of waves I was wondering how or rather why longer wavelengths are able to pass through walls when visible light range wavelengths are unable to. [link] [comments] |
Question about municipal water supplies and waste - what percentage of initial supply is returned? Posted: 10 Jan 2020 02:00 AM PST To clarify the question - take a city that uses a river for their water supply and returns treated waste water to the same river. Now for the purposes of my question let's take one household, an apartment. The apartment uses 100 gallons a day for drinking water and food prep, cleaning, showers, etc. Assume there is no landscaping or internal plantings, no car washing, etc that would contribute to loss of water. With usage of 100 gallons a day, what is the eventual return to the river following the progression through waste treatment cycle? [link] [comments] |
How does software turn off a computer? Posted: 09 Jan 2020 04:56 PM PST |
Posted: 10 Jan 2020 01:04 AM PST |
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