Are there any poisons/toxins which, if taken separately, are fatal, but if taken simultaneously, are not? |
- Are there any poisons/toxins which, if taken separately, are fatal, but if taken simultaneously, are not?
- What's reference point for the speed of light?
- Do x-rays have depth of field like regular cameras do? How do things look in an out of focus X-ray shot?
- Do our brains process faces differently as we age?
- How is linearity of quantum mechanics compatible with non-linear systems higher up?
- Why does the tricuspid valve have 3 cusps and the mitral valve have 2 cusps? Why is there a difference?
- When something exceeds its half-life, what does it become?
- What does the colour of gas giant planets, like Jupiter's Red Spot come from?
- Why does Ice behind the ear mitigate a Vasovagal response?
- Gravitons, Where do they come from? Are they a field like the Higgs Boson?
- Why does going from 20 or 30 frames per second to something like 60 cause an image to appear smoother (faster?), but going from 60 fps to 120 fps cause video to appear in slow motion?
- Is it theoretically possible to reach space in a hot air balloon?
- How do we determine an accurate half life of an isotope?
- Are there any negative effects to long-term exposure to high-frequency/ultrasonic sounds like in animal repellent devices?
- [Physics] How are electrons in an atom distributed?
- Are there any examples of sexual reproduction that involves more than 2 gametes?
| Posted: 27 Apr 2017 06:31 PM PDT |
| What's reference point for the speed of light? Posted: 28 Apr 2017 02:42 AM PDT Is there such a thing? Furthermore, if we get two objects moving towards each other 60% speed of light can they exceed the speed of light relative to one another? [link] [comments]  |
| Posted: 27 Apr 2017 09:03 AM PDT |
| Do our brains process faces differently as we age? Posted: 27 Apr 2017 02:39 PM PDT For example, a five year old looks at a picture of the face of a ten year old and thinks they look old and mature, whereas if the child looks at that same picture ten years later, he'll probably think the ten year old looks childish. Can this be explained in the brain? [link] [comments]  |
| How is linearity of quantum mechanics compatible with non-linear systems higher up? Posted: 28 Apr 2017 06:20 AM PDT One striking property of the Shrodinger's Equation is that it's linear - if I want to compute the evolution of a sum of waves, I can just compute for each wave and add the results up. However, if you compose linear functions, aren't you always suposed to get linear functions? How can complicated systems (macro objects) exhibit non-linear behaviour if they are composed of linear parts? Especially confusing is the squared modulus rule for probabilities of measurement - where the hell does that come from? Squaring is pretty obviously nonlinear. How come? [link] [comments]  |
| Posted: 27 Apr 2017 05:52 PM PDT |
| When something exceeds its half-life, what does it become? Posted: 28 Apr 2017 07:28 AM PDT More directly, a muon has a half-life of 2.2 seconds. What happens after those 2.2 seconds? What does it become? [link] [comments]  |
| What does the colour of gas giant planets, like Jupiter's Red Spot come from? Posted: 27 Apr 2017 01:50 PM PDT |
| Why does Ice behind the ear mitigate a Vasovagal response? Posted: 27 Apr 2017 06:08 PM PDT There are many things that can trigger a Vasovagal response. One of the most common is having blood drawn. The affected may feel dizzy, nauseous, or may even faint. A lesser known treatment is to hold ice behind the ear (corresponding to the arm giving blood) for about a minute before and throughout the drawing of blood. Physiologically, why does this help mitigate a Vasovagal response? [link] [comments]  |
| Gravitons, Where do they come from? Are they a field like the Higgs Boson? Posted: 27 Apr 2017 07:15 PM PDT Hey guys, Im reading Steven Hawkins "The Universe in a Nutshell" and I'm confused on gravitons. I get photons being a release of energy as an electron moves down an orbit and I understand the particles that have to do with the weak nuclear force, I just don't understand the origin of gravitons. Are they emitted from interactions of particles or are they a field? Thanks! [link] [comments]  |
| Posted: 27 Apr 2017 01:35 PM PDT |
| Is it theoretically possible to reach space in a hot air balloon? Posted: 27 Apr 2017 04:57 AM PDT |
| How do we determine an accurate half life of an isotope? Posted: 27 Apr 2017 06:30 AM PDT I have a general understanding of what half lives are and how we date things using them. My question is this -- how do we determine the actual rate of a half life for something beyond our immediate observable timeline? For example, for potassium-40 the half life is considered to be about 1.3 billion years. Since we cannot directly observe that amount of time, how do we arrive that that is the correct half life? Is there a constant decay of the isotope that we can then project how long it would be for a half life? And if this is the case, how can we accurately factor in cases where exponential decay may occur? Thanks for your time in answering my question. I apologize if this has been answered before and I was unable to find it -- still new to reddit. [link] [comments]  |
| Posted: 27 Apr 2017 11:07 AM PDT Looking for information related to mental and physical effects on children and young people specifically, but also in general. The reason for this post is to find reputable sources that relate to the topic. Answers are fantastic, but appreciate citable resources as well. [link] [comments]  |
| [Physics] How are electrons in an atom distributed? Posted: 27 Apr 2017 04:59 AM PDT So I'm fresh out of high school and what they taught us about the atomic model was niels bohrs model(I think) , with the definite locations of electrons arranged in shells around the nucleus. Thing is I recently stumbled across it online that this was extremely outdated and apparently what's now used is the electronic cloud model, can someone explain to me how this works? I tried reading about it but could only grasp about 50% of it. Some parts of it were just too complicated like, "an electron exists everywhere in the atomic at the same time" I can't seem to understand this part perfectly. How do electrons in an atom exist? As waves or as particles? How are they spaced out, can they be pinpointed at a particular point? [link] [comments]  |
| Are there any examples of sexual reproduction that involves more than 2 gametes? Posted: 27 Apr 2017 01:56 AM PDT Excluding asexual reproduction, are there any examples that involve three or more gametes? If not why is there this limit throughout all taxa on earth? Thanks! [link] [comments]  |
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