When there is a high load on an electrical grid, why can't we just let the frequency drop (eg 50 -> 45 Hz) and then recover later, rather then requiring rolling blackouts / load shedding? |
- When there is a high load on an electrical grid, why can't we just let the frequency drop (eg 50 -> 45 Hz) and then recover later, rather then requiring rolling blackouts / load shedding?
- Does the force of gravity travel at c?
- Could you have FTL but no time travel if your FTL could only take you to places that were in the future (or simultaneous) according to a fixed universal reference frame?
- At the airport recently I saw a design for the winglet on the end of the wing I'd never seen before - one fin up, and one down. We have had at least 60 years of jet airplane design why hasn't the optimal wing design be found already?
- What casues the wavefunction of alpha particles collapse in radioactive decay?
- The element Oganesson has the highest proton count of any element , what is stopping us from artificially adding a proton to it to see what new element we have created?
- How much does gravitational force differ in strength across the world?
- In guitar amplifiers, why are the "Presence" and "Resonance" controls on the power amp and the rest of the EQ controls (Bass, Mid, Treble) on the preamp?
- Is sugar the simplest chemical that we find sweet? Does it register sweetness to us the strongest?
- In 2004 an often quoted paper was published that claimed that the increase in 5-year survival from chemotherapy is only 2.3%. What is the current position of research on the efficiency of chemotherapy?
- Does the shape of a battery play a part in its properties?
- What kind of energy is released during a fusion reaction?
- Is it just a coincidence that the magnetic axis of the earth is parallel to the axis of rotation and also parallel to the axis of rotation around the sun?
- Why do humans not have a mating season?
- Does alcohol increase our vulnerability to stress ?
- Is a tree's photosynthetic efficiency affected by its age?
- In Antihydrogen production, how does a Minimum-B trap work?
- Can your fluid intelligence be increased/manipulated at all, or is it all genetic?
- Why do clouds always seem to sail so smoothly in the skies, even when on the ground the wind comes in irregular short gusts?
| Posted: 25 Dec 2017 02:17 AM PST |
| Does the force of gravity travel at c? Posted: 24 Dec 2017 06:35 AM PST Hi, I am not sure wether this is the correct place to ask this question but here goes. Does the force of gravity travel at the speed of light? I have read some articles that we haven't confirmed this experimentally. If I understand this correctly newtonian gravity claims instant force.. So that's a no-go. Now I wonder how accurate relativistic calculations are and how much room they allow for deviations.( 99%c for example) Are we experiencing the gravity of the sun 499 seconds ago? Edit: Sorry , i did not mean the force of gravity but the gravitational waves . I am sorry if I upset some people asking this question, I am just trying to grasp the fundamental forces as we understand them. I am a technician and never enjoyed bachelor education. My apologies for my poor wording! [link] [comments]  |
| Posted: 24 Dec 2017 08:20 AM PST So there would be some sort of aether that, although irrelevant for any known physics, everything could be measured as moving "relative to". With the reference frame of this aether determining the "future" according to this FTL method. To break it down, 1: Is this even coherent? 2: Is there somehow still a way to do time travel even with this restriction? Or for anyone feeling particularly generous, 3: What oddities might one observe using such an FTL method in a galaxy moving quite fast relative to this special frame? [link] [comments]  |
| Posted: 24 Dec 2017 04:36 PM PST |
| What casues the wavefunction of alpha particles collapse in radioactive decay? Posted: 25 Dec 2017 03:36 AM PST As I understand alpha decay, the wavefunction of the alpha particle shows that the alpha particle has a probability to appear far enough away from the nucleus to be expelled. This probability is dependent on factors such as mass and (charge?) of the atom. However as I understand, the wavefunction of any particle is just a probability of finding any particle in a specific location upon "looking"(interacting). Why does radioactive decay occur, as I would think something needs to collapse the wavefunction so that the alpha particle can be "found" outside the nucleus of the atom. But if this is due to some interaction with other particles (inside the atom or other atoms) shouldn't the wavefunction be permanently collapsed as it is always interacting in some form of another. I most likely do not understand the wavefunction enough so any kind of help would be nice! Kind regards, Dagl [link] [comments]  |
| Posted: 24 Dec 2017 11:54 AM PST I know that adding new protons to an element has been done before but that it is very expensive and usually produces a radioactive element but surely it would be worth the cost and risk to see what goes beyond the Oganesson? [link] [comments]  |
| How much does gravitational force differ in strength across the world? Posted: 25 Dec 2017 03:49 AM PST |
| Posted: 24 Dec 2017 01:19 PM PST I've owned quite a few guitar amps in my day, but I've never really understood why the "super high" and "super low" frequencies are always adjusted via knobs on the power amp and not on the preamp with the rest of the EQ controls. [link] [comments]  |
| Is sugar the simplest chemical that we find sweet? Does it register sweetness to us the strongest? Posted: 24 Dec 2017 12:48 PM PST |
| Posted: 24 Dec 2017 06:53 AM PST I am referring to the below study: http://www.sciencedirect.com/science/article/pii/S0936655504002225 Abstract Aims The debate on the funding and availability of cytotoxic drugs raises questions about the contribution of curative or adjuvant cytotoxic chemotherapy to survival in adult cancer patients. Materials and methods We undertook a literature search for randomised clinical trials reporting a 5-year survival benefit attributable solely to cytotoxic chemotherapy in adult malignancies. The total number of newly diagnosed cancer patients for 22 major adult malignancies was determined from cancer registry data in Australia and from the Surveillance Epidemiology and End Results data in the USA for 1998. For each malignancy, the absolute number to benefit was the product of (a) the total number of persons with that malignancy; (b) the proportion or subgroup(s) of that malignancy showing a benefit; and (c) the percentage increase in 5-year survival due solely to cytotoxic chemotherapy. The overall contribution was the sum total of the absolute numbers showing a 5-year survival benefit expressed as a percentage of the total number for the 22 malignancies. Results The overall contribution of curative and adjuvant cytotoxic chemotherapy to 5-year survival in adults was estimated to be 2.3% in Australia and 2.1% in the USA. Conclusion As the 5-year relative survival rate for cancer in Australia is now over 60%, it is clear that cytotoxic chemotherapy only makes a minor contribution to cancer survival. To justify the continued funding and availability of drugs used in cytotoxic chemotherapy, a rigorous evaluation of the cost-effectiveness and impact on quality of life is urgently required. [link] [comments]  |
| Does the shape of a battery play a part in its properties? Posted: 24 Dec 2017 12:51 PM PST i.e. lifespan or strength And is it only applicable in certain uses? [link] [comments]  |
| What kind of energy is released during a fusion reaction? Posted: 24 Dec 2017 03:39 PM PST When burning fossil fuels like coal or oil, we basically harvest the excess energy stored in the atomic carbon bonds compared to a co2 bond. Solar and wind work kinda different because they passively gather external energy. But what type of energy is released during a fusion reaction? I understand that the deuterium/tritium fuel „loses" a neutron in the process... so is it the binding energy of that neutron? (Basically the weak force?) But that's is just a wild guess and probably wrong. Thanks a ton in advance! Oh and sorry for the horrible english :/. [link] [comments]  |
| Posted: 24 Dec 2017 10:07 AM PST Aka could "north" on a compass on a different planet point to a point in that planet's equator? [link] [comments]  |
| Why do humans not have a mating season? Posted: 24 Dec 2017 02:42 AM PST So many different species (crabs, cats, etc.) seem to have a mating season. Did we evolve to just not need it? [link] [comments]  |
| Does alcohol increase our vulnerability to stress ? Posted: 24 Dec 2017 07:46 AM PST Hi everyone, I looked it up on google but I couldn't find any paper about the relationship between stress and alcohol, only papers about alcoholism. Does alcohol increase our vulnerability to stress ? Or is alcohol, when taken, makes our stress levels more important ? Thanks [link] [comments]  |
| Is a tree's photosynthetic efficiency affected by its age? Posted: 24 Dec 2017 05:00 AM PST I am curious to know if a tree becomes more or less efficient at converting carbon dioxide into oxygen as it ages. [link] [comments]  |
| In Antihydrogen production, how does a Minimum-B trap work? Posted: 24 Dec 2017 11:35 AM PST Im interested in antihydrogen production at cern, and since antihydorgen is neutral a 'minimum-B' trap is used instead of penning trap, but im having difficulty getting to grips how this actually works. suggestions for papers/books would be great. [link] [comments]  |
| Can your fluid intelligence be increased/manipulated at all, or is it all genetic? Posted: 24 Dec 2017 08:46 AM PST What I'm really asking is, if I can increase my crystallized intelligence as far as possible (i.e. gaining new knowledge and information) and store that information in combination with the other gathered information, would it affect my long-term fluid intelligence? Some people tell me that it would result in similar effects to studying for a test, where your fluidity would only increase in the short-term and only for what you've learned, but I'm not sure. I need the facts. [link] [comments]  |
| Posted: 24 Dec 2017 04:42 AM PST I know there are buildings, trees and what not on the ground, but these stay in place so I dont know if these could make the flow of air so irregular on land. [link] [comments]  |
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