Why are antennas a half wavelength? |
- Why are antennas a half wavelength?
- In the early 20th century, when ads for cigarettes were claiming their products were "supported by doctors," was there actual scientific evidence (biased or unbiased) that doctors used to make these claims at that time?
- Which 6 of the 16 Einstein field equations are duplicates, and why?
- Why do acetylation and methylation have their respective effects on DNA?
- How is soil perchlorate concentration affected with depth on Mars?
- Common sense tells me nuclear fusion and nuclear fission are mutually exclusive as a means of creating energy. Yet I know that stars make energy by fusing elements, and that our nuclear reactors exploit nuclear fission. How is it possible that both create energy?
- What is the smallest object that we have been able to observe the gravity of?
- What effect, if any, did the huge losses of life in WWII have upon the genetic health of the war torn populations?
- If a sphere's infinite amount of points were expanded from the center of the sphere(like a balloon) would there be gaps in between the points?
- How fast would two Earth size planets have to be moving to orbit each other 100 miles apart?
- Does the gravity of the spinning earth drag satellites with it?
- What is the difference between hydrogen and anti hydrogen?
- Are there any (hypothetical) puzzles that can only be solved when moving parts of the puzzle at relativistic speeds?
- Does it make sense to speak of "liquid diamond?"
- Are there instances when an infection with one pathogen 'miraculously' cures another pathology or condition within the same patient?
- Does quantum mechanics describe electricity?
- How will we service the James Webb telescope if needed?
- Is there any relationship between an organism's number of chromosomes and it's complexity or features?
- Is the density of the water at the bottom of the ocean lower than the water at the surface?
- If the rumor of gravitational waves is confirmed, would it be evidence of gravitons?
| Why are antennas a half wavelength? Posted: What would happen if it was a wavelength instead of half? [link] [comments]  |
| Posted: I know it was fairly popular for even the doctor to smoke. I wonder if any of them that did actually based their choices on evidence of the time thinking they were making a sound decision. [link] [comments]  |
| Which 6 of the 16 Einstein field equations are duplicates, and why? Posted: This video around 12 minutes in explains that the Einstein field equation contains two indices, each of which can take one of four values (0,1,2,3 for t,x,y,z), which means one equation is really 16. Six of these equations are purportedly "duplicates." Which are they, and why? [link] [comments]  |
| Why do acetylation and methylation have their respective effects on DNA? Posted: Is there a simple concept behind this. I have trouble remembering which does which, and so knowing why it happens will help. Thanks [link] [comments]  |
| How is soil perchlorate concentration affected with depth on Mars? Posted: In other words, can one dig a bit deeper beneath the martian top soil and find soil with a lower perchlorate concentration (for human use)? If not, what would be the most efficient way of neutralizing these perchlorates while conserving water? [link] [comments]  |
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| What is the smallest object that we have been able to observe the gravity of? Posted: |
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| Posted: Like if you marked every point on a sphere and each mark grew a straight "hair" away from the center would the sphere become hairy? [link] [comments]  |
| How fast would two Earth size planets have to be moving to orbit each other 100 miles apart? Posted: |
| Does the gravity of the spinning earth drag satellites with it? Posted: Today I heard a space podcast talking about different orbital routes and saying that the "polar route", a circle which crosses north and southpole, is good because you can scan the whole earth while it is spinning under the satellite. I heard that the earth drags the spacetime into some sort of spiral because it's rotating, so my question is: How big is the effect of this "space time wraping" on satellites? [link] [comments]  |
| What is the difference between hydrogen and anti hydrogen? Posted: How do they vary chemically? Can I drink anti water without it affecting me? [link] [comments]  |
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| Does it make sense to speak of "liquid diamond?" Posted: I came across a topic here that mentioned liquid diamond for the sake of argument, and it struck me as odd. Doesn't the rigid structure of the carbon atoms determine the diamond allotrope of carbon? But indeed I quickly found reputable sources that mention it. How is this possible? What would it's properties be? [link] [comments]  |
| Posted: I feel as though I've heard anecdotal evidence that patient X had, for example, a pathology (acquired or intrinsic) and after becoming infected with another illness found their other malady disappeared. Any validity to this or evidenced-based studies you are aware of? [link] [comments]  |
| Does quantum mechanics describe electricity? Posted: In quantum theory electrons move through two slits in a wave like fashion so does it makes sense that electricity jumps around to static points, not a wave. Like lighting. Further more, am I right in understanding that quantum theory explains the colours we see? ROYGBIV./ [link] [comments]  |
| How will we service the James Webb telescope if needed? Posted: |
| Posted: I was reading the Wikipedia article on humans and learned that all the other apes have 24 rather than 23 chromosomes. This made me interested in how many chromosomes other species have, and the list I found seems to be all over the place. Daisies have 2, rice has 24, hegehogs have a few hundred, a lot of mammals seem to have around 40, what exactly is going on here? I don't see any kind of pattern aside from the difference between hominids with 24 and 23 chromosomes. Plants, mammals, birds, and insects all seem to have all sorts of chromosome counts, so what's the deal here? Why is there such a massive diversity of chromosomal numbers? Why do things with such different numbers of chromosomes look so similar? Why does it take 24 chromosomes to make rice but only 2 to make daisies? Is rice incredibly compliated? Inefficiently structured? Is a lot of it just redundant junk? I have to say I'm absolutely mystified. This is something I'd never given the slightest thought to in the past but it seems significant. [link] [comments]  |
| Is the density of the water at the bottom of the ocean lower than the water at the surface? Posted: |
| If the rumor of gravitational waves is confirmed, would it be evidence of gravitons? Posted: I know it's not complete evidence, but it seems like now we can start to identify some properties of gravitons [link] [comments]  |
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