Physics

Anyone able to help me understand if this makes sense? A scenario someone proposed and I have reservations about. A gas cylinder - fill estimated ~170L compressed gas, plus steel cylinder + aerial harness (unclear weight) - is falling. Let's say it hits the upper corner at ~50 m/s, and slows to 30 m/s before hitting the balcony floor. Not shown: the aerial harness with fins are on at first but removed somewhere on the way, left badly crumpled. It's designed so the thing falls nose/valve first. Both the corner impact and subsequent impact through the balcony floor are presumed nose-first, but not necessarily 100% vertical. Then somehow its falling causes THE SIDE o…

So I was thinking about how long the earth core will remain molten and the how much power is produced by the earth's core compared the amount of energy earth receives from sunlight and what would happen if geothermal energy was overused, pretty straight forward, the earth's core solidifies and that led me to thinking about tidal energy, which is powered by the moon rotating around the earth. And what happens if tidal energy is overused. The tide ceases. But then I thought "Hmm there has to be something else being used up, otherwise that would just be providing far too much energy considering the moon's orbit won't finish decaying for billions more years. Can it really be…

the simple explanation for the reason light travels slower through water than a vacuum seems to be that when light is traveling through water the photons are absorbed by atoms for a short time and then emitted to be absorbed and emitted by other atoms. in a chain reaction kind of progress, the light eventually is transmitted through the water. is this just an oversimplification or is there something that causes the photon to keep moving in the same direction it was moving before being absorbed. why isn't the photon emitted in a random direction ?

Hello all. If a very long bridge was built, say from England to Australia, it would be correct to say that the bridge would follow the earths curve and therefore not be level. If, however, a bridge that was this long was built and was perfectly level, would I be correct in thinking that it would seem to gradually slope 'upwards' up to a point where it would be impossible to climb? Regards Ricky

i know it is not possible but theoretically speaking if I put my hang in the Large Hardon Collider and the two particles wizz around and smashed into my hand what would happen? would my hang just explode? would there be a big hole in my hand? or is the collision so small it wont effect my hand at all?

In our solar system Mercury was once though to be tidally locked to the sun, now we know it rotates three times in two orbits of the sun. Is it probable that planets that are being discovered in close orbits of small stars but still in the life zone of that planet might do the same instead of being locked like the moon is to the earth?

Hello. This is my first post ever here, and I'm pretty sure it's not in the correct section, and I apologize for that. So the atoms in a molecule vibrate in relation to each other. And when IR radiation is absorbed by a molecule these vibrations increase. Apparently absorption only happens if there is a change in dipole moment. How do the streching and bending effects change dipole moment? Is it that streching adjusts the distance between the atoms or what?

I was reading about "Quantum Entanglement" .. and one explanation was saying that if we have two dices that are quantum entangled, if we roll one for N times and it result in N ordered outcomes, if we roll the other N times, we will get the exact same outcomes ... Not only I'm shocked by that example, but also confused .. my question is simple: what is quantum entanglement exactly ?

One question, why does the normal force of a car on a banked road is actually greater than the downwards mg newtons of the car? shouldn't the normal force be simply a reaction force to one of the components of the weight of the car? please help~~~thanks

Right, well... Were all familiar with most films including this scenario involve some guy in a spaceship or whatever colliding into an asteroid or acidic blood from zenomorphs burning a hole in his ship. Suddenly WHOOOOSH! he's sucked out of a hole and thrown into the vacuum of space; and this is where my problem begins. I'd been of the understanding that because space is empty that theres nothing there to "suck" with, it's really just the pressure within the spaceship "pushing" out and escaping to fill a lower pressure volume, right? If my line of thinking is correct it'd kinda support my second hypothesis of why a spaceship doesn't just get torn apart by the hug…

I was reading how earths core is heated by radio active decay and I was wondering if someone picked up a piece of uranium or plutonium that let's say the USA was Making a nuke from would it be hot to the touch? Isn't it mined for? If someone touched the raw material would it feel hot. If so how hot?

Hi! My name is ufuk ı am 11 so ı am not someone knows how quantum physics work. Actually, ı am here to just find a physics game/simulator ı can mess with electricity and try to make a working engine etc.

In starling forces only hydrostatic pressure is taken into account. I don't understand if blood is moving through a capillary don't they have to take velocity pressure of blood as well? Thanks!!

I currently have to do a project for grade 12 science were I have to create A person who can generate lightning. I have been reading alot about lightning but i need to way to explain how it could be generated on comand by a human. I is aloud to be far fettched as long as it envoles some science. I have also been reading about doornob shocks wich i thought could be used as a suttle version of it. if anyone has any ideas or links for me to read that would be reat Thank You PS hope this is in the right section

HELLO In a real transformer , Why Ns Is= Np Ip ??? Please explain simply

Are dark matter and dark energy physical properties of an ever expanding universal system that will eventual die or vanish through entropy or some other catastrophe, or are they the antithesis of a system gradually morphing into a new beginning? Since I have a hard time believing this graph, I was wondering what other ideas might be out there? Image credit: NASA / WMAP science team. Would the Universe recollapse, like the yellow line shows? Would it expand off into infinity, watching its size increase ever-so-slowly as the expansion rate drops to zero, begging for just one more proton, as that would be enough to cause a recollapse, like the green line? Or would it exp…

Argues the SLS as early as 2017 can be used to launch manned lunar lander missions: SLS for Return to the Moon by the 50th Anniversary of Apollo 11. blog advertising link removed by Moderator Bob Clark

Okay this was just a random thought one day.. but think about this. If you were able to build a perfect ring around the earth, supported by beams, and then you took all the beams out at the same time. Would the ring float around the earth because of gravity? Or would it fall over, or spin around the earth??

http://knol.google.com/k/alex-belov/paradox-of-classical-mechanics-2/1xmqm1l0s4ys/9# Animated experiment 2 This is animation based on classical mechnics laws This is animation based on theory of standalon rotation with translation movement. The Nature Experiment 2. I made 3 successful experiments with 2 pencils. All these experiment shows different velocities between pencils. The theory is CORRECT. The simulator is WRONG. Here is some snapshots from experiment, which shows experiment dynamic. Links to experiments movies (avi files) Experiment 2_1 Experiment 2_2 …

DO NOT CLOSE THIS TOPIC WITHOUT DISCUSSION! IF YOU THINK SCIENE IS RELIGION THAN I BETTER FIND ANOTHER FORUM AND I WILL BLAME THIS SITE FOREVER. http://knol.google.com/k/alex-belov/paradox-of-classical-mechanics-2/1xmqm1l0s4ys/9# The experiment_2 animations This is animation based on classical mechnics laws This is animation based on theory of standalone rotation with translation movement. The Natural Experiment 2. I made 3 successful experiments with 2 pencils. On all these experiments pencils with rotation movement have lower velocity than pencils without rotation. The theory is CORRECT. Th…

If you were to throw some, lets say Volvic (other brands available) water into an ocean of Volvic water, would the water you have thrown in sink or float? I'm not a physicist, as you can probably tell. In fact, I'm not sure whether this should be in the physics or chemistry section, but I was just wondering. Thanks lol

I wrote a short paper about electricity magnetism and the derivation of Maxwell equation see attached file What i need is your comments suggestion an language mistake correction From water pipe lines toward Maxwell EquationsC.pdf

I viewed a small chip using an electron microscope.I saw many crystal shaped structures in that small chip. My Physics teacher told me that those crystal shaped structures are metals(active and inactive). Is it true???

There is a patent I filed last year, It implements solar sails. To ensure that we keep close to the sun and get most of its radiation pressure, we will use what I call a solar propeller but the name solar mill makes more sense.So lets call it a solar mill. This is a solar sail that instead of being pushed away by the sun's radiation pressure it actually keeps spinning about its axis. We all agree that we cannot keep on increasing the spin indefinitely because the solar sails will break apart at a certain centrifugal force. To prevent damage to our payload we shall keep it stationary using a gyroscope at the center of the system. A magnetic bearing can be used to reduce …

Hi all. A spear mass is 1 Kg. If gravity g is 9.81 m/s² on this planet, its weight is F=mg = 1 x 9.81 = 9.81 Newtons. Is that right so far ? That same spear of 1 Kg underwater weighs 5 Newtons. Does it mean that the acceleration of gravity is not exactly constant in this planet as it would be then, g = F/m = 5/9.81 = 0.51 m/s² because differs underwater, part of this same planet ?