Can dogs observe and recognize aging in adult humans? Do they differentiate between young adult, middle-aged and elderly humans? |
- Can dogs observe and recognize aging in adult humans? Do they differentiate between young adult, middle-aged and elderly humans?
- If 2 people dislike the same food, are they then more likely to dislike other similar foods?
- Does the Mach Cone occurs only appears when crossing the 1 Mach speed or it can also appear later during the supersonic flight (> 1 Mach)?
- Why don't the palms of our hands and the soles of our feet tan or burn?
- Is it possible to trigger or "activate" a volcanic eruption?
- Is white light dispersed by a prism always the same? (angles to colour)?
- Is it possible to transform martian soil into fertile soil through bacteria and fungi?
- Do cats purr voluntarily or unvoluntarily?
- When you physically break or shatter a flash storage chip, to what degree is the data still readable from the fragments?
- Why is it that during winter it's not uncommon to have days with abnormally high temperature and summer-like weather, but in the summer it never drops to winter-like weather for a day?
- Are there any known mutations in drosophila melanogaster that cause a phenotype of folded downward wings?
- Could a planet with a highly eccentric orbit be tidally locked?
- Does energy accumulate in geographical faults in such a manner that the longer that energy isn't released, the bigger energy-releases we can expect at once? (i.e. earthquakes, volcanos).
- Are blood bags usually sealed (in a vacuum)?
- Are seatbelt/phone detection cameras a real thing? And if so, how do they work?
- What is the most amount of electrons forcibly added to an atom?
- Why does the taste of tap water vary between locations?
- I think I understand the difference between aleph-null and aleph-one as countable and uncountable infinities, but what is aleph-two?
- How do processors make sure their calculations are done correctly when out of the billions of transistors they have, a few will surely fail over time?
- Do any of the stars we can observe with tbe naked eye at night have planets orbiting them?
- How do developers of Nuclear Weapons either keep (or protect themselves from) radioactive materials like Plutonium-239 from potentially ‘leaking’ out particles? Are there any methods to contain these particles from escaping the material so they won’t hurt biological matter near the material?
- If the vaporization point of water can be changed by increasing pressure, is the freezing point also affected by pressure?
- Alternates to Xenon for Electric Propulsion?
| Posted: 19 Feb 2018 01:18 PM PST I guess I should also specify: If they do, can they make these distinctions instinctively, without training by human handlers? [link] [comments]  |
| If 2 people dislike the same food, are they then more likely to dislike other similar foods? Posted: 20 Feb 2018 07:02 AM PST |
| Posted: 20 Feb 2018 07:32 AM PST Hi. I m currently arguing with a colleague about the fact that the mach cone (example : https://www.youtube.com/watch?v=x0gvWhDgm_E ) appears only when the object is passing the "sound barrier" (Mach 1) or if it can appear whenever the plane flies at a speed > 1.0 Mach. My thoughts are that the video titles are missleading and always labelled as "Mach Cone while passing sound barrier". I think that if we could follow a plane at that speed we could see the mach cone randomly appearing. The appearence essentially depending of the air humidity of a given spot in the atmosphere. Thanks ! [link] [comments]  |
| Why don't the palms of our hands and the soles of our feet tan or burn? Posted: 20 Feb 2018 02:34 AM PST |
| Is it possible to trigger or "activate" a volcanic eruption? Posted: 20 Feb 2018 05:48 AM PST I just saw a post that showed the Indonesian volcanic eruption and got curious. Can a person cause volcanic activity? For example, what if a person mined near a volcano or used explosives near one? [link] [comments]  |
| Is white light dispersed by a prism always the same? (angles to colour)? Posted: 20 Feb 2018 07:07 AM PST I'm not entirely sure how to articulate my question correctly but hope that below makes sense: If you shine a white light through a prism, you will get the colours of the rainbow dispersed. When you move the prism on its axis, the rainbow of course moves along with it. If you go back to the exact same position as before, will the exact same dispersion occur as before? What is the mathematics behind this? [link] [comments]  |
| Is it possible to transform martian soil into fertile soil through bacteria and fungi? Posted: 19 Feb 2018 04:14 PM PST |
| Do cats purr voluntarily or unvoluntarily? Posted: 19 Feb 2018 06:15 PM PST For example if we're petting a cat, does it purr voluntarily to tell us that its enjoying the attention, or is it more of a reaction, like when we laugh if tickled? [link] [comments]  |
| Posted: 20 Feb 2018 02:28 AM PST If you have confidential data on a flash chip, like in a phone, flash drive or SSD, and you physically break it into pieces (not pulverize it into dust, just shatter it into fragments), is the data still accessible if an attacker can get access to the chip fragments? Will physically breaking the chips cause the electrical charges that data is stored as to discharge completely in a reasonable amount of time (several days, one or two weeks)? In other words, if the data is recoverable, will it become unrecoverable anytime soon? [link] [comments]  |
| Posted: 20 Feb 2018 08:23 AM PST |
| Posted: 20 Feb 2018 08:23 AM PST I was in lab doing crosses of fruit flies and trying to grow them at an optimal temperature to get the correct expression of a certain gene. One of the crosses showed folded wings pointing downward as if the wing was folded like paper. I tried looking up folded wing phenotypes but couldn't find anything and was just wondering if anyone else knows a specific mutation that may cause a phenotype like the one above. [link] [comments]  |
| Could a planet with a highly eccentric orbit be tidally locked? Posted: 20 Feb 2018 08:07 AM PST |
| Posted: 20 Feb 2018 06:18 AM PST I'm not talking about predicting earthquakes or other natural disasters. With the number of variables to be taken into account, I know that's an impossible task. My question is more about the accumulating energy in the earth and it's existing (or not) relationship with one time releasing of large quantities of energy. Maybe my whole question is dumb because maybe energy does not accumulate? I'm clearly no expert in geology (or even basic physics for that matter) but I have tried the internet with no success. [link] [comments]  |
| Are blood bags usually sealed (in a vacuum)? Posted: 20 Feb 2018 06:12 AM PST I didn't know exactly where to post this, but I was calculating the pressure of blood coming from a blood bag for a physics problem and was curious to know if blood is normally stored in a vacuum (so no additional pressure from air). [link] [comments]  |
| Are seatbelt/phone detection cameras a real thing? And if so, how do they work? Posted: 19 Feb 2018 10:39 PM PST They've been talking about implementing those where I live and I find it a little hard to comprehend how that can work in a real life setting. Thanks! [link] [comments]  |
| What is the most amount of electrons forcibly added to an atom? Posted: 19 Feb 2018 04:14 PM PST So like the title says, I know ionization energy increases with each additional electron taken away, I assume the reverse is true for adding electrons. How many electrons has someone tried to add to an atom in a laboratory? How unstable was it, how long did it last? What chemical properties were attained from the extremely negative ion? [link] [comments]  |
| Why does the taste of tap water vary between locations? Posted: 19 Feb 2018 05:10 PM PST |
| Posted: 19 Feb 2018 09:37 AM PST My understanding is that aleph-null is the set of natural numbers or any set of numbers that can be mapped to the set of natural numbers, and that aleph-one is the set of numbers that, like real numbers, can't, as proven by Cantor's diagonal argument. This is pretty intuitive and I think I understand how that works. But what is aleph-two and above then? By analogy it would be something that can't be mapped to the set of real numbers, but I don't know what that looks like. [link] [comments]  |
| Posted: 20 Feb 2018 12:02 AM PST |
| Do any of the stars we can observe with tbe naked eye at night have planets orbiting them? Posted: 19 Feb 2018 04:07 PM PST |
| Posted: 19 Feb 2018 04:03 PM PST I was just thinking about a documentary I saw about World War 2, specifically about Atomic Bombs like Fat Man which were thrown over Japan. In the documentary, someone said that the bomb had to be armed manually with several pins before it was dropped. My assumption is that for anybody to feel comfortable enough to be near such a dangerous source of radioactive material, they must have felt pretty sure that there was no actual harm in being near the thing in it of itself, and it's not especially dangerous at rest. But Beta radiation decay is strong enough to pass through aluminum, and gamma radiation is strong enough to pass through lead, right? I get that the bomb could have a protective outer casing, but is that really all there is between the bomb and it's surroundings? Is that enough to contain the nuclear decay? I guess my vision of nuclear material is that it's kinda like pure acidic material thatis strong enough to tear through any metalthat is trying to hold it, but that is seemingly not the case. It just seems like something so potentially dangerous that I wouldn't dare go near it, no matter what it's stored in. [link] [comments]  |
| Posted: 19 Feb 2018 03:09 PM PST last year I learned about basic hydraulics in my 4th class Power Engineering class and I remember that the boiling point of water is affected by pressure. For instance; Water boils at 212 Fahrenheit at 0 psi, My question, and what I thought about was, does pressure also change the freezing point of water. Using pressure, could we have super cooled water? or is there other factors that would need to be in place. If possible, would the super cooled water suddenly turn into ice as the pressure was released? [link] [comments]  |
| Alternates to Xenon for Electric Propulsion? Posted: 19 Feb 2018 10:28 PM PST Hello, I have been researching some stuff on electric propulsion. I understand why Xenon is the most preferred choice. But technically any element/chemical could be used instead, am I right? Do we have systems that run on other propellents? other than the noble gases. (any compounds?) Any help is much appreciated. Thank you. PS: I did not really find anything with Google. [link] [comments]  |
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