Why doesn't a dark chocolate bar break predictably, despite chocolate's homogeneity and deep grooves in the bar? |
- Why doesn't a dark chocolate bar break predictably, despite chocolate's homogeneity and deep grooves in the bar?
- Why don't microwave ovens vary their frequency to eliminate hot spots?
- AskScience AMA Series: I am a squid biologist, AMA!
- Is there a difference in language between North and South Korea? Is the North’s dialect frozen in time compared to the South?
- How are the assembly languages for different processors turned into higher level programming languages like C?
- How does the Leptin protein get transported into the Hypothalamus, more specifically how does it get past the Blood-Brain Barrier?
- The typical rule of thumb is chemical reactions occur more quickly by increasing temperature. Are there reactions that occur more quickly at 'cold' temperatures?
- Why do bullets with particularly high velocities do a better job of penetrating armor?
- What color is the grass at night?
- What happens if I get hit by a gamma ray?
- How does the photon of specific phase that causes stimulated emission in a laser device arise?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- Would using the alphabet as a base 26 (25?) Number set be useful in cryptography?
- How does wave height effect water pressure below the surface?
- Why does matter collapse in a black hole instead of just getting compressed but at a nonzero volume?
- How is that once the sun goes down I can get AM radio signals from cities over 2000 km away?
- How do magnets work at the quantum level?
- What is the difference between shock- and soundwave?
- Why is ash mostly gray?
- Can you increase the magnetic field of a bar magnet using electromagnetism?
- How often do cannabis-related studies get published in publications with a high impact factor?
- Is there any connection, mathematically or linguistically, between angular degrees and temperature degrees?
| Posted: 09 Jan 2018 06:36 PM PST I was eating a dark chocolate bar and noticed even when scored with large grooves half the thickness of the bar, the chocolate wouldn't always split along the line. I was wondering if perhaps it had to do with how the chocolate was tempered or the particle sizes and grain in the ingredients, or something else. I also noticed this happens much less in milk chocolate, which would make sense since it is less brittle. [link] [comments]  |
| Why don't microwave ovens vary their frequency to eliminate hot spots? Posted: 09 Jan 2018 04:36 PM PST It seems that everything else is going solid-state, so why do microwaves continue relying on a rotating platter? Would it be that much harder to vary the frequency and (hopefully) move the nodes & antinodes around? [link] [comments]  |
| AskScience AMA Series: I am a squid biologist, AMA! Posted: 10 Jan 2018 04:00 AM PST My name is Sarah McAnulty and I'm a squid biologist at The University of Connecticut! I am currently trying to understand how the Hawaiian bobtail squid's immune system is able to tell the difference between the squid's bioluminescent bacterial partner and other kinds of bacteria. I've worked with cuttlefish camouflage in the past, and worked with octopuses before too! I spend most of time raising squid and working with a confocal microscope, taking videos of the squid's immune cells as they interact with bacteria. On the side I organize a program called Skype a Scientist which matches classrooms and scientists around the world to chat about science! You can read more about my squid science here: http://bit.ly/2mj24oC And more about Skype a Scientist here: www.skypeascientist.com I've also been on Science Friday twice, once to talk squid and another to talk about Skype a Scientist! You can check out those interviews here: https://www.sciencefriday.com/person/sarah-mcanulty/ I'll be on from 12-2 ET (17-19 UT), ask me anything! [link] [comments]  |
| Posted: 09 Jan 2018 10:12 AM PST |
| Posted: 09 Jan 2018 04:09 PM PST I understand the highest level programming languages are written in lower level ones, (ie. java is written in C), but what handles converting C to assembly? Is C rewritten for different processors? [link] [comments]  |
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| Posted: 10 Jan 2018 03:46 AM PST |
| Why do bullets with particularly high velocities do a better job of penetrating armor? Posted: 10 Jan 2018 02:42 AM PST One thing I noticed was that lead core 55-grain M193 rounds from an AR-15 will easily poke holes in steel targets rated for rifles at closer ranges because of its velocity. The slightly heavier 62-grain M855 rounds will leave a divot at close range, but not completely penetrate the steel plates despite the bullet having a steel penetrator. TFB TV also recently did a video of the 7.5 FK pistol round, which was designed specifically to have a very high velocity, had no problem penetrating armor rated for pistols. [link] [comments]  |
| What color is the grass at night? Posted: 09 Jan 2018 10:14 PM PST It's a longstanding family dispute. The Greens and the Blacks don't get along. Is color an absolute property of an object, or does it change with the light? [link] [comments]  |
| What happens if I get hit by a gamma ray? Posted: 09 Jan 2018 08:07 AM PST |
| How does the photon of specific phase that causes stimulated emission in a laser device arise? Posted: 09 Jan 2018 05:29 PM PST I understand that when a photon of specific properties (phase, wavelength..) comes near an excited atom with sufficient energy, the atom will most probably release a photon that has the same properties as the first photon and will fall to a lower energy state. I understand this is how light is amplified in a laser device after population inversion is achieved. I just don't understand one thing. Where does the photon that causes stimulated emission in the device come from in the first place? I tried to think of an explanation taking spontaneous emissions as a factor and using brewster's window for polarization but that seemed really unintuitve for some reason. Is there an external entity that increases the probability of the spontaneously emitted photons to be in a specific phase? It would be a great help if someone could explain this. Thanks! [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 10 Jan 2018 07:06 AM PST Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary 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] [comments]  |
| Would using the alphabet as a base 26 (25?) Number set be useful in cryptography? Posted: 10 Jan 2018 06:43 AM PST I was thinking about different bases, and with a representing "0", would this give rise to prime number (letter?) Sets and thus give rise to different encryption algorithms? [link] [comments]  |
| How does wave height effect water pressure below the surface? Posted: 09 Jan 2018 05:35 PM PST If water pressure equals (density)(gravity)(depth), then does the water pressure at the bottom of the ocean change under surface waves as the depth changes with rising and falling waves? [link] [comments]  |
| Why does matter collapse in a black hole instead of just getting compressed but at a nonzero volume? Posted: 09 Jan 2018 08:15 PM PST I was watching the end of something about black holes, and then I realized that the way everyone talks about black holes is that before it becomes a black hole, the matter is just super dense (and presumably compressed), and then once it compresses below the Schwarzschild radius it just splats into a singularity. But why is this? If an object has a radius 1 foot from the Schwarzschild radius, and then it increases in density/compression/whatever that squishes it beneath that radius, why can't the matter just be compressed 1 foot below the Schwarzschild radius? Does space itself collapse or something? Here is a picture of what I mean: https://i.imgur.com/8ypC4Tp.jpg [link] [comments]  |
| How is that once the sun goes down I can get AM radio signals from cities over 2000 km away? Posted: 09 Jan 2018 05:55 PM PST I live in northern Canada. We have one local AM radio station. I've noticed that sometimes I have trouble getting a clear signal and if I move the dial around I can pick up a few American stations. These are generally from Washington State but I occasionally get stations from much farther south or to the east. American talk radio is so bizarrely foreign and I can't help but wonder if there's someone on the other end picking up our CBC station with stories of ice quakes, caribou hunts or local politics. [link] [comments]  |
| How do magnets work at the quantum level? Posted: 09 Jan 2018 07:56 PM PST I know magnets produce magnetic fields and how magnetic fields work. What causes magnetic fields and what causes them to work that way on a quantum level. I know magnets attract materials with electrons of the same spin. Why do they do this? Why is spin related? And how does this create a magnetic field? [link] [comments]  |
| What is the difference between shock- and soundwave? Posted: 10 Jan 2018 03:23 AM PST As the title says, what is the difference? Isn't it basically the same thing, soundwave being a weaker version of shockwave? Like an explosion - you hear the pop due to pressure "front" reaching your ears, be you close enough - you'll get hit, far away - just a soundwave with no real damage potential. Or am I mixing something? [link] [comments]  |
| Posted: 09 Jan 2018 09:15 PM PST |
| Can you increase the magnetic field of a bar magnet using electromagnetism? Posted: 09 Jan 2018 06:55 PM PST I've been really interested in electromagnetism lately but don't have much knowledge of the physics behind it. I know that iron rods are generally used in solenoids to produce a stronger magnetic field. I've also read that solenoids produce magnetic fields similar to bar magnets. If you were to use a bar magnet in place of an iron rod in an electromagnet, would it increase the magnetic field of the bar magnet, or would it not be possible? And could you change the shape of the solenoid to create a better magnetic field/amplified field? [link] [comments]  |
| How often do cannabis-related studies get published in publications with a high impact factor? Posted: 09 Jan 2018 03:12 PM PST Perhaps I should do some more digging, but I am not finding any cannabis study coming out of a publication with an impact factor greater than 6. Is Google Scholar the wrong place to look? Do I need special access to university databases to find the current most cited cannabis studies? [link] [comments]  |
| Posted: 09 Jan 2018 11:29 AM PST I'm not sure if there is a better subreddit to ask on, as this may or may not have a historical math explanation. [link] [comments]  |
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