Hi Reddit, I’m Margaret Leinen, here to talk about the world’s oceans and how we observe them. Ask Me Anything! |
- Hi Reddit, I’m Margaret Leinen, here to talk about the world’s oceans and how we observe them. Ask Me Anything!
- Why does cheddar cheese crumble, but mozzarella is stringy and stretchy?
- Do young children who grow up bi-lingual initially assume they are just learning 1 language, or do they always know that they speak more than 1 language?
- When a light or sound wave hits a surface upon which it can reflect, it undergoes a phase change of pi. Why?
- If you fired a handgun from the ISS, pointing away from Earth, would it be able to escape Earth's gravitational pull?
- Why aren't balloons used as a platform for space launches?
- Is there a maximum speed at which a gas can escape through a hole? What affects it?
- Black holes bend space so that light doesn't have a "path" out. How does more matter enter a black hole?
- If water boils in a vacuum, what happens if there is not much space for the water to expand into (e.g. the airless volume inside a container is only twice the size of the volume of water as a liquid)?
- Does increasing the pressure of a gas in a container (and thus increasing the gas's density) decrease the speed of light through it?
- How do electronics in satellites not get effected by the Earth's magnetic field? Does the field affect the orbit speed/direction due to the satellite being made of metal?
- Why is brain size relevant in comparing interspecies intelligence but not intraspecies intelligence?
- if 'mass is confined energy', and energy is just a concept that help us in dealing with physics, what does the first phrase mean ??
- What were humans when the asteroid hit?
- Are we anywhere near making nuclear fusion produce more energy than it consumes?
- Is there any not-yet-feasible but theoretically sound experiment that would determine topology of the universe?
- Can all combinations of sounds be replaced by a sound of a single frequency?
- I saw a picture of an Owl nest (Link Inside) basically made out of lemmings. Is this normal behavior and why would an animal make a nest of other animals?
- What is the advantage of having five, rather than four or six, fingers?
- How is information encoded between the eye and the brain?
| Posted: 21 Jun 2016 05:32 AM PDT I'm the president (http://about.agu.org/president/) of the American Geophysical Union, the world's leading organization of earth and space scientists, and I'm also the director of Scripps Institution of Oceanography (https://scripps.ucsd.edu/) at UC San Diego (http://www.ucsd.edu/), which has a global focus on understanding and protecting the planet through ocean, earth, and atmospheric explorations. The oceans cover more than 70 percent of the planet and hold the key to many critical challenges facing science and society, from sustainably feeding human populations to addressing the impacts of climate change to protecting vulnerable marine species. One of the cornerstone methods of keeping tabs on the oceans is through innovative tools and technologies to monitor them. At Scripps Oceanography we contribute to several ocean observation systems and networks that relay critical data about the seas and how they are changing. These include networks just off our populated coastlines (Southern California Coastal Ocean Observing System, (http://www.sccoos.org/)) for applications as diverse as marine operations, coastal hazards, and ecosystems, to far out at sea where it's not easy to access information (Argo, (http://argo.ucsd.edu/)) to help us understand phenomena such as El Niños and ocean warming. I look forward to answering your questions about ocean observations between 12 and 1 EST on Tuesday, 21 June! Ask Me Anything! [link] [comments]  |
| Why does cheddar cheese crumble, but mozzarella is stringy and stretchy? Posted: 20 Jun 2016 07:46 PM PDT Did a quick google, didnt find anything. Edit: probably flaired wrong. Sorry mods, not sure where it goes [link] [comments]  |
| Posted: 20 Jun 2016 08:47 PM PDT I recently met a child who spoke both Russian and English. However, she just used the languages interchangably and could alternate words in a sentence between the two languages. I grew up bi-lingual but I knew I only spoke one language with my grandparents, and English with my parents. So does this child who creates sentences in 2 languages really know that she is speaking 2 languages? Or does she just think that there are more than just 1 word per item she is refering to, and uses them interchangably? [link] [comments]  |
| Posted: 21 Jun 2016 02:09 AM PDT Why doesn't it undergo a path change of half a wavelength instead? [link] [comments]  |
| Posted: 20 Jun 2016 08:25 PM PDT Title. My mates and I were discussing bullet physics in space and this scenario came up. In addition to the primary question, would you actually be able to fire a gun in space? We surmised that the atmosphere within the bullet would sustain the ignition to fire the weapon, but we're tired, stupid, and we need real answers. [link] [comments]  |
| Why aren't balloons used as a platform for space launches? Posted: 20 Jun 2016 08:38 PM PDT Obviously a balloon couldn't make it to space, but could one not be used to carry a launch vehicle the first 30km or so, allowing it to launch from above the thickest part of the atmosphere? Even if it didn't mean an increase in payload, I imagine a balloon launch would be significantly cheaper than all the hardware/fuel required for a launch from the ground. [link] [comments]  |
| Is there a maximum speed at which a gas can escape through a hole? What affects it? Posted: 20 Jun 2016 08:29 PM PDT If I have an indestructible un-shape-changeable ^(I hope someone could provide me with a word that would fit that better) balloon and I filled it at 1 psi, then 2 psi, then 3 psi ... up to infinity, would there be a maximum speed at which gases could escape? [link] [comments]  |
| Posted: 20 Jun 2016 11:33 AM PDT This is very confusing to me. As I understand it, the reason light can't escape a black hole is because the gravity of the black hole has bent space so much that there isn't an path that light could take that would lead out of the black hole. If that's true, wouldn't a black hole somehow segregated from the rest of space? How does this even work? [link] [comments]  |
| Posted: 20 Jun 2016 12:05 PM PDT I was trying to image what would happen if I had some water (say a liter) inside an airtight container and it filled the space. If I could draw a plunger and expand the space to 2 liters, but no air could get in, and the container would resist the pressure, what would happen to the water. Would it become a basically a less dense liquid spread throughout the 2 liter space)? [link] [comments]  |
| Posted: 21 Jun 2016 04:28 AM PDT |
| Posted: 20 Jun 2016 08:41 PM PDT |
| Why is brain size relevant in comparing interspecies intelligence but not intraspecies intelligence? Posted: 20 Jun 2016 03:35 PM PDT Why is it that brain volume is considered a relevant factor in estimating the approximate difference in intelligence in early and late hominid species but between individuals or groups or modern humans? [link] [comments]  |
| Posted: 20 Jun 2016 04:52 PM PDT |
| What were humans when the asteroid hit? Posted: 20 Jun 2016 04:28 PM PDT I.e., 65 million years ago, what (ape) ancestor(s) survived that extinction to become humans? [link] [comments]  |
| Are we anywhere near making nuclear fusion produce more energy than it consumes? Posted: 20 Jun 2016 01:19 PM PDT At least from what i have understood, that current ones aren't very effective. [link] [comments]  |
| Posted: 20 Jun 2016 10:01 AM PDT Or is there a fundamental problem preventing one from observing the topology of the spacetime he's in? [link] [comments]  |
| Can all combinations of sounds be replaced by a sound of a single frequency? Posted: 20 Jun 2016 09:43 AM PDT I know that a sound is determined by its amplitude (loudness), frequency (pitch), and harmonics. Suppose I play 2 different notes on the keyboard. The sound wave pattern that I get, can I play a sound at a specific frequency which would sound the same as the 2 combined? Should this frequency also be present on the keyboard? I guess what I'm asking is do sounds of different frequencies combine in any form to create new frequencies like light? Or are they only recreatable as a combination of multiple different sounds? Also, side question: all notes on a keyboard have a fixed frequency. Do the different preset tunes only differentiate in harmonics, or is it something else? [link] [comments]  |
| Posted: 20 Jun 2016 01:04 PM PDT |
| What is the advantage of having five, rather than four or six, fingers? Posted: 20 Jun 2016 04:33 AM PDT Why do humans have five fingers (and toes) instead of any other number of fingers (and toes) [link] [comments]  |
| How is information encoded between the eye and the brain? Posted: 20 Jun 2016 04:26 AM PDT Taking a very simplistic and potentially naive view of the eye, it takes in light (or "information") which stimulates rods and comes which are on the retina. This information is then transmitted along the optic nerve to the brain. This information needs to be encoded in some form - do we know how it is encoded? [link] [comments]  |
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