Recent questions tagged physics

Description : What are some basic interesting topics of physics ?

Last Answer : Some basic but interesting topics in physics include: Force and motion: This topic covers the basic laws of motion, such as Newton's laws, and how they apply to objects in motion. Energy and ... dives into any of these topics can lead to a deeper understanding of physics and the world around us.

Description : Could people such as Einstein solve the unsolved mysteries of the world if they were still here?

Last Answer : I would like to think that the answer is yes. They should have gained some additional knowledge that would round out their original genius!!!

Description : Robotics gurus and engineers: what is the disadvantage of shifting weight to the torso in a hexapod robot?

Last Answer : Well, not an engineer or anything, but the higher the centre of mass, the easier it is for the whole machine to topple over, especially when it goes up stairs. Or, think of a car going through a ... higher the centre of mass, the slower it has to go through the corner, in order to not flip over.

Description : What equation to use?

Last Answer : From https://www.fluther.com/help/guidelines/question-specific/ Homework Questions Feel free to ask for help on your subject, but simply posting your homework question verbatim and expecting an answer is rude! We’re not here to do your homework for you.

Description : What formula do I have to use?

Last Answer : Sorry, we don’t do your homework for you. But if you take a stab at the answer, you might get a helpful response.

Description : Is it the amp's in that kill you, and not the voltage?

Last Answer : The voltage is the pressure that drives the amps through a wire. Resistance (load) is the control. Amperage is the flow of electrons. There is no resistance when a bolt of lightning hits you (so the amperage is out of this world) and the voltage is through the roof.

Description : Could the radiation on Mars be used to generate electricity?

Last Answer : I defer to Rocketguy who is a literal rocket scientist. But I don’t think so. Certainly it wouldn’t be a regular source of energy. Even solar isn’t a regular source of energy.

Description : Is the universe a perpetual motion machine?

Last Answer : I don’t think so because there is a loss of energy due to entropy. I’m not a physicist, and I very much could be wrong about this.

Description : Why are some elements radioactive and some not?

Last Answer : It depends on the stability of the nucleus. As nuclei get bigger, they get less stable and therefore are radioactive.

Description : Why is 50m most pistols' effective range?

Last Answer : The length of the barrel has a lot to do with it. Less pressure expended to the bullet because of the barrel's short length. Not enough rifling to really get the bullet straightened out to fly true for ... six .22 revolver with 6 barrel if I have enough time and bullets to throw/lob at the target.

Description : Why are high wattage class 4 lasers so much more expensive than lower wattage lasers?

Last Answer : I’m guessing it’s got to do with the research and development it takes to build the more expensive laser. They need to make their money back. Also they may make less of them so they’re more expensive to build. And lastly, they charge what the market will bear.

Description : What are some facts, or skills , that you have problems learning that others seem to be able to master easy?

Last Answer : I have problems learning accounting. I've had ONE accounting job and it was a bad match, though I DID learn how to do financial reports. I want to start my own business but cannot handle the business ... inept because in the 1980s I HAD a cell phone and was computer literate, way ahead of the times.

Description : Were there to be no adverse effects on health of being overweight, how much longer would someone live due to time dilation?

Last Answer : I’m 20,000 years old, and a little bit overweight. So I would guess at least that.

Description : Are there any materials that liquefy when you heat them to a certain temperature, but turn solid again if you heat them any higher?

Last Answer : Needs to be fully reversible, of course.

Description : What is the speed of gravity?

Last Answer : I think you mean FORCE not SPEED Speed: read this Force: read this

Description : Can a dropped packing peanut reach terminal velcoity?

Last Answer : In a vacuum

Description : Is there someone here at Fluther who is a professor of Physics?

Last Answer : There was a guy here, maybe 3–4 years ago, with the Fluther name of AlbertEinstein. I haven’t seen him a whole, and I doubt it was the real one.

Description : If you put spin on an object in motion in space will its path curve?

Last Answer : It will conserve angular momentum and spin, and it will conserve linear momentum and travel straight. It will not curve if it’s not acted on by an external force.

Description : Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

Last Answer : Do you mean ‘floaters’? https://www.mayoclinic.org/diseases-conditions/eye-floaters/symptoms-causes/syc-20372346

Description : How does ice cool water it sits in?

Last Answer : When ice melts, it absorbs heat. The water it sits in becomes diluted with the cold water.

Description : Could quantum entanglement be used in electric energy production?

Last Answer : The Second Law of Thermodynamics states that it is impossible. You always get less energy out of a system than you put into it and you can’t get energy for nothing.

Description : What happens when you coil a magnetic rod?

Last Answer : Maybe might make a rail gun?

Description : What happens when you break quark bands?

Last Answer : BOOM!? Maybe a sub-atomic explosion.

Description : Questions about plasma?

Last Answer : dNot sure how you would actually separate the electrons from the nuclei. In an Inductively coupled plasma analyzer, a sample is inductively heated to the point of ionizing the elements of the sample. ... effect is heat and ionization, but not much else. Anything beyond that and I am speculating.

Description : Why do the phases of the Moon, affect the tides?

Last Answer : You know, a full Moon makes a higher than normal “high tide.” Why?...

Description : What are the properties of different atoms that have no protons?

Last Answer : Electrons need particles with opposite charge to stay attracted, so need an equal number of protons in the middle. It is possible, however, to have an atom with no neutron. Electrons don’t need neutrons to stay in place.

Description : Would Quantum Slipstream and the Borg Transwarp Drive be affected by an Omega Particle explosion?

Last Answer : Both transwarp and quantum slipstream drives operate on the same basic principles as conventional warp drives, and neither bypasses the need to travel through subspace. So presumably they would both be affected ... . The same should also be true for a Xindi energy portal (aka subspace vortex).

Description : What are some good beginner-level tinkering projects to do at home?

Last Answer : You can look around for solder joints to fix. Whirlpool used to make a front load washing machine that shook its solder joints off. There are also electronic assembly kits you can buy. Whatever you ... capacitors with about 30,000 volts stored in them. That would be very bad for your heartbeat.

Description : Can astrologers actually predict the future?

Last Answer : Physics is real science. Astrology is not.

Description : Could you verify this equation, please? In short, tell me if it's true or false, possible or impossible.

Last Answer : What exactly are we meant to be analyzing? You provided an equation claiming a relationship between certain constants. What do you want us to do with it?

Description : What is the ambient temperature in hammer-space?

Last Answer : The temperature of hammerspace is around 294 degrees Kelvin. This temperature is maintained by the transdimensional fold or warp energy produced when objects are brought into or taken out of hammerspace. To ... to the second law of thermodynamics, is manifested as heat. Doesn't everyone know that?

Description : Is this a trick to determine accurately the place and the speed of an electron?

Last Answer : What you are suggesting isn’t possible. Heisenberg’s uncertainty principle says so. The uncertainty principle actually states a fundamental property of quantum systems, and is not a statement about the observational success of current technology.

Description : How do anti-photons behave?

Last Answer : The photon is its own antiparticle. So an anti photon interacts with electrons in the exact same way as the photon. In fact, if you created an anti hydrogen atom, so there was a positron in place of the ... in the atom. The argument is the same for the anti photon since it is the same as a photon.

Description : Why is there a tedency for electrons to settle around a nuclei in up to eight layers?

Last Answer : Quantized energy levels result from the relation between a particle's energy and its wavelength. For a confined particle such as an electron in an atom, the wave function has the form of ... next possible orbit has a distance twice the electron's wavelength. There can be nothing in between.

Description : What is Diamagnetism?

Last Answer : Wikipedia is your friend. https://en.wikipedia.org/wiki/Diamagnetism

Description : What are the differences between top, bottom, strange, and charm quarks from the standard 'up' and 'down' quarks?

Last Answer : Standard disclaimer: I'm but a caveman Yes, they have different mass, but also other properties that make them different. It's a deep rabbit hole, but have you checked out Wikipedia ... properties (along with a good general article on quarks) https://en.wikipedia.org/wiki/Quark#Table_of_properties

Description : Why aren't there screw-based cocking mechanisms for crossbows?

Last Answer : answer:I want to say that there are some screw-based ones, but I've been looking for an illustration and haven't found one yet. I think I have seen such an illustration or even an actual one in a museum ... were more efficient, we'd see more of them, and they're rare enough I'm finding none so far.

Description : Is toast more likely to land jelly side down?

Last Answer : Myth busters did an episode on this subject. I highly recommend it.

Description : Why are metal chains sometimes paired with a smaller metal chain?

Last Answer : answer:I'm not at all certain what else you're referring to here, but you may be talking about something like a chain fall. That has a heavy-duty load chain which is rated to handle the full load that ... spun by the operator (or twists in repose), but it is in no way holding any part of the load.

Description : How can I solve the values of the equations?

Last Answer : I solve it by myself！

Description : Does fire burn sand?

Last Answer : No. A very intense fire may melt sand, but sand is extremely refractory and won’t burn.

Description : What is the most tremendous forces of nature in existence?

Last Answer : There are many and none outshine the others. Tornados, hurricanes, tsunamis, wild fires, earthquakes, volcanic eruptions, avalanches, sink holes, on and on. Kinda like asking what the most awesome life form is. They are all amazing whether a Flea or a Flamingo.

Description : How can the gravity be a constant if that of the earth is, say, six times weaker of the moon? Or inversely, how can be six time weaker than the earth when it is a constant?

Last Answer : That constant only holds here on earth. On the moon it’s like one sixth of that.

Description : Does a crosswind increase drag on forward motion?

Last Answer : answer:Yes. All winds are headwinds except for tailwinds. This is why riders in a bicycling peloton angle away from the crosswind behind the leaders. Cars: Engineers have various methods at their disposal to ... (The egg shape of the Porsche 928 was the most visually obvious example of the latter).

Description : Does surface tension of water decrease with rising temperature?

Last Answer : It decreases as temperature goes up.

Description : Are you ready for new physics?

Last Answer : Yes, have been for a while.

Description : Why do people hate Comic Sans?

Last Answer : Sorry without googling it,I don’t know what a comic san is, perhaps you might explain it??

Description : Would a small insect die from an impact after dropped from a large altitude?

Last Answer : On a world with no atmosphere, the bug's fate would resemble our own. The terminal velocity issue depends of course on the masses of the accelerating objects (the bug and the world) and the duration of ... and a10 ton block from 100 feet above the moon, and both objects arriving at the same time?

Description : Would a warp-capable starship actually need a navigational deflector?

Last Answer : answer:Is warp speed an absolute or a relative number? In other words, could a different ship (or celestial body, or whatever) go faster than warp speed? If it’s a relative speed, then having the deflector might well be useful.

Description : Aerospace engineers, how long would a commercial passenger aeroplane last in the vacuum of space, before it starts leaking atmosphere?

Last Answer : answer:I'm not a structural guy . Maybe someone can answer that part of your question. I can however answer about over design. We make an engine critical part that is exposed to an operating ... for that altitude craft could survive in outer space since that would be only about 33% more stress.