High-intensity ultrasound is being used to destroy tumors rather deep in the brain. How is this possible without damaging the tissue above? |
- High-intensity ultrasound is being used to destroy tumors rather deep in the brain. How is this possible without damaging the tissue above?
- For the universe, if the Big Bang were 12:00:00 on Jan 1, and the theorized Heat Death were 11:59:59 on Dec 31, what day/time is it now?
- When battling a cold or flu, does taking drugs to ease symptoms impact recovery time?
- Do other animal species experience the same right vs. left handed population differences as humans?
- Would Fermat have understood Andrew Wiley's proof?
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- Has the slightly unethical part of the science community found a specific spot to hit on your head in order to increase your math/science ability yet? Asking for a friend
- What is the History of Defining Water's Boiling Point?
- Why can we measure the diameter of a proton but not an electron? Do we have any proof that the electron has size rather than being a point particle?
- I think for an isotope to be created, the neutron number has to change, but how? as in what causes an element to have different number of neutrons?
- Why can’t we use food as energy?
- Why do we see hydrogen's spectral lines in absorption in the sun's spectrum?
- Why does food get crispy when you cook it longer?
- Out of my depth. My nephew is trying to figure out how a cell phone speaker works, what powers it, how does it connect so tiny? He's 14, how do I explain this?
- Why are higher energy levels clustered together?
- Is there any difference between the light that a flashlight makes to the light that the sun makes?
- Is there any way to determine how high mountains used to be?
| Posted: 28 Nov 2018 03:16 AM PST Does this mean that it is possible to create something like an interference pattern of sound waves that "focuses" the energy at a specific point, distant (on the level of centimeters in the above case) from the device that generates them?How does this work? [link] [comments]  |
| Posted: 27 Nov 2018 08:38 PM PST I know comparing the time that has passed to the time that will pass is a very large number, but that's very hard for most people including myself to imagine. I'm hoping if we put it on a calendar scale it'll help. I mean, has it even been one minute yet? [link] [comments]  |
| When battling a cold or flu, does taking drugs to ease symptoms impact recovery time? Posted: 27 Nov 2018 04:37 PM PST It's my understanding that the symptoms of cold and/or flu virus infections (hot flushes, sweating, excess mucus production, inflammation, etc) are the body's attempts at trying to eliminate the virus, alongside the immune response. When we take drugs to try and help reduce those annoying symptoms (paracetamol, phenylephrine, etc), are we interfering with the healing process and ability to overcome the infection? [link] [comments]  |
| Do other animal species experience the same right vs. left handed population differences as humans? Posted: 27 Nov 2018 03:43 PM PST So the other day I was wondering if other animals exhibit hand dominance like humans and read that other primates, kangaroos, and a host of other animals show signs of handedness. Then I started to think about human left handed trends, like how left-handed humans generally have shorter life spans and are GENERALLY more gifted in mathematics and music. In humans, there is a positive correlation between complications of birth and left handedness. Left handed humans are also more likely to break bones, get breast cancer, and suffer from heart disease. Do other animal species see these same differences between their right and left handed populations? I did a bit of digging and couldn't find anything myself, so I thought that you beautiful people maybe be able to help me out. PS. This is more of a zoology question than biology but this is the closes tag I could find :/ [link] [comments]  |
| Would Fermat have understood Andrew Wiley's proof? Posted: 28 Nov 2018 06:25 AM PST The math that Andrew Wiley used to prove Fermat's Last Theorem is more advanced than anything available in the 1600's. Would Fermat have understood Wiley's proof? If not, doesn't a proof of the theorem have to use the "technology" available at the time in order to be considered valid? [link] [comments]  |
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 28 Nov 2018 07:11 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Posted: 28 Nov 2018 06:32 AM PST |
| What is the History of Defining Water's Boiling Point? Posted: 28 Nov 2018 08:13 AM PST I heard a story years ago that I am struggling to remember accurately and I can't find online. The gist was that some famous (perhaps Greek?) scientist estimated the boiling point of water to be 90°C (obviously they weren't actually using Celsius :) ). The next person to come along measured it at 100°C and said, "Oh, but so-and-so is a great scientist. I must be off. Maybe I'll just report that I think the boiling point of water is 92°C." The next guy measures 100°C and says, "Those other guys can't have missed by that much. Maybe I'll report that I think it's 93°C." And so on, until estimates converged to 100°C. Does this ring a bell for anyone? I love the example as an illustration of systems learning slowly, for better or for worse, but I wish I knew both the details and the truth of the story. Any help is much appreciated. [link] [comments]  |
| Posted: 27 Nov 2018 09:27 PM PST |
| Posted: 27 Nov 2018 10:59 PM PST |
| Why can’t we use food as energy? Posted: 27 Nov 2018 10:52 PM PST We live off of food. All of our energy comes from food. All of our motion is fueled by the food we eat. And our body temperature is due to the burning energy we get from food. So why can't we use food to fuel other things like say a car. Why can our body tear food down to energy but we can't build a device that basically does what our body does, tear food down to energy. [link] [comments]  |
| Why do we see hydrogen's spectral lines in absorption in the sun's spectrum? Posted: 27 Nov 2018 04:08 PM PST Why are hydrogen's wavelengths missing from a star's spectra. Does it have something to do with the gas enveloping the sun? [link] [comments]  |
| Why does food get crispy when you cook it longer? Posted: 27 Nov 2018 04:06 PM PST For that matter what actually happens when you cook food? I hardly know anything about cooking, but I was making some food earlier and just had this thought. I really only think of it as heating food up, potentially combining ingredients and things along that nature. However I don't get why it would change just from heating it up. Can someone please explain. [link] [comments]  |
| Posted: 27 Nov 2018 09:49 AM PST He's interested in taking things apart. Right now he has an older phone I think it's an iPhone 6? He found the speaker assembly, and used ifixit to identify the other parts. But he wants to know how to make it work apart from the cell phone. How can he hook the speaker up so it plays from a bluetooth source? I have a soldering iron, but that's as useful as I can be. Thanks for your help in advance! [link] [comments]  |
| Why are higher energy levels clustered together? Posted: 27 Nov 2018 09:49 AM PST When dealing with things like emission lines, you usually see something like this, with the higher n-values being spaced closer together. Why? [link] [comments]  |
| Is there any difference between the light that a flashlight makes to the light that the sun makes? Posted: 27 Nov 2018 10:04 AM PST |
| Is there any way to determine how high mountains used to be? Posted: 27 Nov 2018 09:32 AM PST I'm watching a documentary about Himalayas right now and it got me wondering: could there be a point during Earth's lifetime where the mountains were higher than they are now? If so, how could we know that? [link] [comments]  |
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