- I’ve read that when caterpillars are in their cocoons, they dissolve completely into goo; no original parts survive in the butterfly. How is the butterfly made from the goo? Is there an embryo that grows and uses the goo like a yolk sac? Or does the goo somehow arrange itself into new body parts?
- If tooth decay is just caused by the bacteria feeding and producing acid, would a person that just used listerine have the same dental health as a person that brushed without flossing?
- How sustainable is our landfill trash disposal model in the US? What's the latest in trash tech?
- How are isotopes used in nuclear physics Experiments isolated?
- My doctor says that chemotherapy works by specifically targeting rapidly-dividing cells, which is how it works to fight cancer and also why it has the side effects that it does. But how does it “know” which cells are rapidly dividing? And how rapidly is “rapidly”?
- How mixable are different types of plastic? Like PET and HDPE?
- What makes a laser shine in a straight line?
- Can animals understand human body language like laughing or smiling?
- How are the triple(or more) parachutes commonly seen on capsules returning from space kept apart?
- How are the needles for Atomic Force Microscopes made, and how can the tip be smaller than the atoms they are manipulating? What are their limitations?
- Could an electric vehicle stand a chance in a racing event?
- If there is an ocean below the ice surface of Europa, is the ice shell buoyant? Geologically supported? Or is it kept in place by the distribution of gravity?
- Lithium batteries are being developed to power cars in response to the decline in fossil fuels, but will lithium eventually run out as well?
- How to calculate eigenvalues in the Kirchhoff's thin plate model?
- Since the event at CERN that proved the existence of Higgs bosons/Higgs field, can we now see this event happen regularly now we know ‘where’ to look?
- How did we get solid matter from light? How did Photons and Electrons create solid matter in the early ages of the universe when everything was insanely hot?
- Is there anywhere other than Earth in the Solar system where you could see a total solar eclipse and/or total lunar eclipse equivalent?
- Why does turning on an electric blender in the kitchen cause my HD antenna signal to go out in a different room?
- Can the human body survive breathing pure oxygen at lower pressures?
- How do we know the earth’s core is super hot and why is it so?
| Posted: 23 Nov 2017 06:52 PM PST |
| Posted: 24 Nov 2017 04:00 AM PST |
| How sustainable is our landfill trash disposal model in the US? What's the latest in trash tech? Posted: 24 Nov 2017 06:08 AM PST |
| How are isotopes used in nuclear physics Experiments isolated? Posted: 24 Nov 2017 12:59 AM PST From what I know for heavy species like uranium the preferred method is gas centrifuge but it is extremely expensive. Is the same method used for lighter species such as calcium-48? [link] [comments]  |
| Posted: 24 Nov 2017 04:53 AM PST |
| How mixable are different types of plastic? Like PET and HDPE? Posted: 24 Nov 2017 03:13 AM PST |
| What makes a laser shine in a straight line? Posted: 24 Nov 2017 02:30 AM PST If you shine a laser into a screen or wall you see a round dot and nothing else around. I surely know that the laser can be very coherent spatially and temporally, but shouldn't in that case behave like a point source and emit in all directions as it comes from a small aperture? (I'm basing my argument in Huygen principle) Is the focus just a game of lenses at the aperture of the laser or I am not understanding something? [link] [comments]  |
| Can animals understand human body language like laughing or smiling? Posted: 24 Nov 2017 03:35 AM PST If was looking at a monkey while laughing, would the monkey know it was causing positive emotions and continue to do so? [link] [comments]  |
| How are the triple(or more) parachutes commonly seen on capsules returning from space kept apart? Posted: 24 Nov 2017 01:05 AM PST Judging by the direction of force by the cord, shouldn't they be pulled together? [link] [comments]  |
| Posted: 24 Nov 2017 06:11 AM PST |
| Could an electric vehicle stand a chance in a racing event? Posted: 23 Nov 2017 02:00 PM PST Telsa released their new roadster just a bit ago, which is a very powerful car, and completely electric. Would an electric vehicle have any benefits in a race? Fuel efficiency or decreasing the weight of the car maybe? [link] [comments]  |
| Posted: 23 Nov 2017 11:55 AM PST In other words, how does the solid surface exist with a liquid layer beneath it? Forgive my ignorance if I'm missing any obvious answers to this :D [link] [comments]  |
| Posted: 24 Nov 2017 03:22 AM PST There's a huge push for more sustainable sources of energy because we're running out of fossil fuels, but are lithuim ion batteries that sustainable if the amount of lithium on earth is limited too? Are rechargable batteries truly a renewable source of energy or is it just an alternative to pass the time? What are we gonna do if/when lithium runs out? [link] [comments]  |
| How to calculate eigenvalues in the Kirchhoff's thin plate model? Posted: 23 Nov 2017 03:53 PM PST I guess this could be either physics or mathematics, but I'll mark it as physics. I've been studying the acoustic properties of coins as a personal hobby related to coin collecting. I found this fascinating article by a French professor at the Bank of France about how to determine if a coin is genuine or counterfeit. This methodology is superb and I even tested it with the type of coin used in the paper with an app called spectroid, and the frequencies match up perfectly. However, the calculations in his paper only relate to a specific type of coin with a specific composition. I'm creating a spreadsheet to allow me to enter a coin's properties to recreate this method for any coin. The formula is pretty straightforward, you just need three parts to determine a given frequency, its shape factor (calculated with the thickness and radius), the metal factor (calculated with the density, Young's modulus, and Poisson's ratio), and the eigenvalue. I figured how to do the shape and metal factors, but I'm stumped by the last part which involves eigenvalues for a free, circular plate. That's an area of math well over my head. If anyone has any background in this subject, could you take a moment and look at Table 3 and explain how I could solve the eigenvalues for λ 2,0 , λ 0,1 , and λ 3,0? The author stated that it involved Bessel function of some kind but that wasn't enough to help me figure out on recreating the values. [link] [comments]  |
| Posted: 23 Nov 2017 06:28 PM PST |
| Posted: 23 Nov 2017 12:52 PM PST Pretty self explainatory, but Ive struggled to find answers on google/quora. Anything helps. [link] [comments]  |
| Posted: 23 Nov 2017 09:14 AM PST By lunar eclipse equivalent, I mean when a planet or moon is directly between the sun and another moon. [link] [comments]  |
| Posted: 23 Nov 2017 10:37 AM PST |
| Can the human body survive breathing pure oxygen at lower pressures? Posted: 23 Nov 2017 12:04 PM PST I know that pure oxygen is poisonous at atmospheric pressure, but wasn't sure about the question in the title. I'm reading the new Artemis book about the moon colony - the book explains they breathe pure oxygen at a lower pressure and I wasn't sure if it was true, and if it is true, what the difference is that allows people to be fine in this situation. Thanks! [link] [comments]  |
| How do we know the earth’s core is super hot and why is it so? Posted: 23 Nov 2017 10:27 AM PST |
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