Why is glass so loud? |
- Why is glass so loud?
- Why do my calculator and Wolfram Alpha disagree on a negative number with a fractional exponent?
- Why is this W boson decay possible?
- How powerful would the "Little Boy" atomic bomb have been had all 141 lbs of Uranium-235 undergone fission?
- What is turbulent dissipation and what is the difference between k epsilon and k omega models in Fluid Dyanamics?
- Using two objects moving with different speeds and in opposite directions, we are able to calculate a relative speed depending on the referential. What would happen if the relative speed calculated with two physically feasible speeds was above the speed of light?
- What sorts of problems does asymptotically safe gravity face as a potential quantum gravity solution?
- Why does coffee have oil rings on surface?
- Why is the reflection of a projector green?
- Ask Anything Wednesday - Engineering, Mathematics, Computer Science
- Why is water so hard to find on other planets when it is such a simple compound?
- Why doesn't nuclear fusion violate the Second Law of Thermodynamics?
- Do cold/flu symptoms improve recovery from the viruses?
- How does depression affect the hormonal system?
- How deep into the crust under an ocean would you still find water?
- Regarding faster than light travel and vibrations/sound waves.
- When Lava cools and become rock is it "freezing" in the same way that water turns into ice?
| Posted: 22 Dec 2015 11:37 AM PST I dumped a bucket of bigger glass shards into a trashcan (containing more glass), and it was so loud it hurt my ears. Also, my girlfriend fell through a glassdoor (said shards were from the glass door), and it also was extremely loud. Why is that? Why is hitting or breaking glass so loud? Edit: I love to see how everyone is discussing, this really made my day :) Thanks Reddit! [link] [275 comments]  |
| Why do my calculator and Wolfram Alpha disagree on a negative number with a fractional exponent? Posted: 22 Dec 2015 08:24 AM PST When calculating something like (-2)3/5 my TI calculator gives a (real) value of about -1.515, but when I ask Wolfram Alpha for the same expression it gives an imaginary number, but with the same magnitude as what the calculator gives. Why is there a difference, and is one of them wrong? [link] [17 comments]  |
| Why is this W boson decay possible? Posted: 22 Dec 2015 10:01 AM PST My textbook says that W- --> u + anti d is a possible decay. Doesn't this violate the conservation of charge or am I missing something? [link] [10 comments]  |
| Posted: 23 Dec 2015 05:07 AM PST According to the Wikipedia article,"The 16 kiloton yield of the Little Boy bomb was ... produced by the fission of no more than 2 pounds (0.91 kg) of uranium-235, out of the 141 pounds (64 kg) in the pit. The remaining 139 pounds (63 kg), 98.5% of the total, contributed nothing to the energy yield." How strong would the explosion have been had all the uranium undergone fission? On a side note, I wasn't sure whether to filter this question by Chemistry or Physics, so I flipped a coin. [link] [2 comments]  |
| Posted: 22 Dec 2015 10:42 AM PST |
| Posted: 22 Dec 2015 07:53 AM PST For example, let's imagine two "Super" cars A and B. They both go in opposite directions. They have two "attainable" speed for each car: c/2 [m/s] for car A, and c/2[m/s] + 1[m/s] for car B. What would the passengers of car A see when they encounter car B as they seem like going over the speed of light for their referential? Or am I missing something? Thank you for your answers! [link] [30 comments]  |
| Posted: 22 Dec 2015 10:29 AM PST I've recently read an article by Ethan Siegel over at Forbes (he also blogs at Starts with a Bang) on asymptotically safe gravity as a possible alternative to string theory. I read the author's blog from time to time, and he's described the potential benefits of asymptotically safe gravity, as well as the apparent prediction of a 126 GeV Higgs Boson years ago. My question is, what sorts of challenges does this idea face when it comes to quantum gravity? I feel like the buzz generated by an extremely accurate Higgs prediction, coupled with the ability to avoid adding entities like extra dimensions and supersymmetric particles, would be a huge positive in favor of asymptotically safe gravity. That being said, I do see much written on the subject and I wonder if that might be related to inherent problems or skepticism in relation to the framework. [link] [14 comments]  |
| Why does coffee have oil rings on surface? Posted: 23 Dec 2015 06:18 AM PST Every time I pour coffee I notice what looks like oil rings on the surface. Why is this? [link] [2 comments]  |
| Why is the reflection of a projector green? Posted: 22 Dec 2015 07:17 AM PST The first image shows the screen is all white except for black test and a bit of red. The reflection on the floor is green, however. I've seen this in every classroom in my school and it doesn't matter what's being displayed on the screen. What's causing this? Not sure what type of science this is, so I don't know what category to flair. [link] [6 comments]  |
| Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 23 Dec 2015 07:02 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer Science 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] [comment]  |
| Why is water so hard to find on other planets when it is such a simple compound? Posted: 23 Dec 2015 03:08 AM PST |
| Why doesn't nuclear fusion violate the Second Law of Thermodynamics? Posted: 22 Dec 2015 10:59 PM PST |
| Do cold/flu symptoms improve recovery from the viruses? Posted: 22 Dec 2015 04:04 PM PST My understanding is that some of the symptoms (mucous production, fever) are sort of "broad brush" ways that the body attempts to remove infections. If this is the case, how well do any of them actually work in fighting rhinovirus/influenza? [link] [7 comments]  |
| How does depression affect the hormonal system? Posted: 22 Dec 2015 03:01 AM PST |
| How deep into the crust under an ocean would you still find water? Posted: 22 Dec 2015 11:51 AM PST Say at the deepest point in the ocean where water meets crust, how deep into the earth would water still be found? [link] [3 comments]  |
| Regarding faster than light travel and vibrations/sound waves. Posted: 22 Dec 2015 09:23 PM PST I am not sure if this is exactly the right place to post this because its all involving theory rather than any concrete fact but, Were a ship traveling at near the speed of light or at the speed of light make sound? Would someone making noise be heard by anyone at all? Would the engines make any sound? If the ship was traveling at the speed where the sound could not travel any faster than the ship but still make sound can the sound stack up and then hit in one massive blast of vibrations when you slow down? If light speed is the fastest anything can go and nothing can go any faster than would the sound made traveling at the speed of light be able to get to someone in front of the sound as you were traveling? Would you only be able to hear the sound behind where it was made since you would at that point travel into the area the sound was at and pass through the sound waves or vibrations? A ship traveling at light speed means the air inside is traveling that fast as well but the sound wave cannot travel at the speed of sound relative to the ship since it is already traveling at the theoretical limit of speed of anything right? Would vibrations travel through materials when traveling at the speed of light? The vibration would then be traveling faster than light in the direction the ship was moving. What would happen to prevent this from happening? Are there any theories on something like this? This may just not even be worth discussing because we just wouldn't have any information on these things though so any answers may jsut be opinions or guesses though huh? [link] [2 comments]  |
| When Lava cools and become rock is it "freezing" in the same way that water turns into ice? Posted: 22 Dec 2015 11:38 AM PST |
| You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment