How Does the Equipment in Hospitals/Labs Produce Gamma Rays in the MeV range? |
- How Does the Equipment in Hospitals/Labs Produce Gamma Rays in the MeV range?
- What would the world look like if electrons were spinning at 2/5 instead of 1/2?
- Why does it seem as though it's more common to get sick when the seasons or weather change?
- Is there any herbal medicine that has clinical evidence about its efficacy ?
- How effective is water (say, clear pool water) at blocking UV radiation?
- Why does a glass full of water, when tapped on a marble tile, make a distinctly different noise as opposed to when empty?
- Does a warm/hot bath increase or decrease blood pressure? I've read/heard conflicting info.
- Why do leaves appear to "turn over" before it rains?
- On average each generation is taller than the previous, then theoretically we would continue to grow. What would stop our growth?
- Who feels the umbilical cord being cut? Mother, child or both?
- Why won't honey freeze solid?
- Why does log P matter when determining if a drug will work well?
- Do animals enjoy music to any extent?
- How can E=mc^2 have a negative solution?
- What is effective field theory?
- How did the elements form after the big bang?
- If Salmonidae (steelhead, salmon, etc) all return to the same tributary/stream that they were born in, why aren't there thousands of species?
- What is the technical difference between a rectilinear lens and a fish-eye lens and why does one keep the lines straight while the other doesn't?
- What is the explanation given for how the contribution of Feynmann diagrams of electron scattering to the total integral depends on the amount of vertices?
| How Does the Equipment in Hospitals/Labs Produce Gamma Rays in the MeV range? Posted: 23 Jul 2017 07:37 AM PDT Do they just use radioactive material decays or do they have machines that concentrate/focus them in a way? I know that Cobalt 60 can produce up to 1.3~ MeV during its decay into nickel. I have also seen alpha bombardment of boron using polonium but that only gets up to 3~ MeV. I could not find any information on how higher values are achieved. How are values above let's say 7 MeV reached? [link] [comments]  |
| What would the world look like if electrons were spinning at 2/5 instead of 1/2? Posted: 23 Jul 2017 04:43 AM PDT |
| Why does it seem as though it's more common to get sick when the seasons or weather change? Posted: 23 Jul 2017 07:03 AM PDT |
| Is there any herbal medicine that has clinical evidence about its efficacy ? Posted: 23 Jul 2017 07:10 AM PDT |
| How effective is water (say, clear pool water) at blocking UV radiation? Posted: 22 Jul 2017 01:53 PM PDT I know that light bends as it passes through a different medium, but how does it affect the UV radiation? Can pool water act as a type of sunblock for submerged skin? [link] [comments]  |
| Posted: 23 Jul 2017 07:48 AM PDT It makes a slightly more deeper noise, as if its hollow. Always intrigued by that. [link] [comments]  |
| Does a warm/hot bath increase or decrease blood pressure? I've read/heard conflicting info. Posted: 23 Jul 2017 07:42 AM PDT |
| Why do leaves appear to "turn over" before it rains? Posted: 23 Jul 2017 07:37 AM PDT The underside of deciduous leaves are clearly visible before it rains. I've seen many different speculations as to why, including wives tales, humidity, change in winds, barometric pressure, etc. Is there a concrete explanation? [link] [comments]  |
| Posted: 23 Jul 2017 07:16 AM PDT |
| Who feels the umbilical cord being cut? Mother, child or both? Posted: 23 Jul 2017 07:08 AM PDT |
| Posted: 22 Jul 2017 03:05 PM PDT |
| Why does log P matter when determining if a drug will work well? Posted: 23 Jul 2017 05:22 AM PDT I understand that since there's a lot of different solutions in the body and some are immiscible the drug needs to be soluble in all of them, but why does it matter how MUCH more soluble the drug is in one solution than another? [link] [comments]  |
| Do animals enjoy music to any extent? Posted: 22 Jul 2017 10:56 AM PDT Does it annoy them? Do they like it? Do they even care or notice? [link] [comments]  |
| How can E=mc^2 have a negative solution? Posted: 22 Jul 2017 12:45 PM PDT Paul Dirac showed that there is negative energy but how did he prove this? I don't doubt that it is true, i just don't understand it. c ist the speed of light squared so it defenitely is positive. For this equation to be true there would have to be negative mass then, right? But negative mass sounds so unintuitive. Thanks for the help! [link] [comments]  |
| What is effective field theory? Posted: 22 Jul 2017 03:34 PM PDT |
| How did the elements form after the big bang? Posted: 22 Jul 2017 09:50 AM PDT |
| Posted: 22 Jul 2017 09:06 AM PDT I have always been under the assumption that salmon and related species always return to the same stream they were born in to spawn. If that is the case, why aren't there many more species of them? If my assumptions are correct, wouldn't that create isolated genetic groups which over time would become different species? Do they crossbreed, sometimes go to other streams, or is this just a common misunderstanding? Thanks in advance for any explanations you could give. [link] [comments]  |
| Posted: 22 Jul 2017 12:53 PM PDT |
| Posted: 22 Jul 2017 10:56 AM PDT [disclaimer, not a physicist] I watched this video on electron scattering, feynmann diagrams, and perturbation theory, in relation to solving infinities with path integrals, and from what I understand the total contribution to the behaviour in electron scattering is a sum of all possible interactions. That's fine and all, just typical Quantum weirdness, but why do 4 vertices interactions contribute with a factor of 100 less? Basically the question is: Is it correct that "every additional vertex in an interaction reduces its contribution to the (total) probability by a factor of around a hundred, and why"?
The reason why I'm asking this is I've always been fascinated and curious about an 'it-from-bit' kind of approach to the foundation of physical reality. I've been exploring quantum computation and quantum gravitation in relation to this, basically just looking for observations that hint to information or computation being more fundamental than matter and energy itself. Apart from the above question, if you have something else interesting I would love to see that as well! Thank you in advance! [link] [comments]  |
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