Attraction Definition and 305 Threads

I am kind of an arm chair layman, The following is just my own curious mind working furiously on something I know I don't completely understand, and yet want to. It seems to me that just about every piece of matter is made up of mass, and therefor has some level of electromagnetic and gravitic...

Physics Videos by Eugene Khutoryansky (a widely respected channel) recently posted a video on YouTube suggesting this. I know that gravitational fields cause time dilation (with time passing more slowly the closer an object is to the centre of gravity, relative to more distant observers), but...

hi I'm writing a javascript application to illustrate gravitational attraction between masses, but am getting hung up on some of the details, particularly mow far masses move in response to each other's gravitation. I've read all available wikipedia articles on gravity and have come up with...

This seems simple but i cannot find an answer anywhere. First off: is iron attracted to a magnet because the field strength on the side of the iron object closest to the magnet is stronger than the one furthest? And if this is true, how can one use this "differential" magnetic field to calculate...

Hello everyone, I'm sorry if it's a dumb question, I'm very new in self studying particle physics. May I ask when we associate a charge (i.e. positive or negative) to quark and lepton, is it only because of their attraction or repulsion toward each other? in other words, is it just to name one...

Hello! I have read (I don't remember the source, and have it only in my notes now) that oxo acids can be strong if Y element has a high electronegativity. If generic formula for oxo acids is HnYOm, than if Y has high electronegativity, it will cause the acid to become strong because Y will be...

We are taught that the forces of attraction in a liquid are lesser than those in a solid. What is the reason? Is it because the intermolecular spaces are large or is it because the individual attractive force of the molecule is less?

Hi, I fail to understand attraction with the 'two people throwing balls at each other' analogy. Please help.

I have always been told that a charged object will attract an uncharged on when brought close (but do not touch) the uncharged object. However, wouldn't this depend on whether the uncharged object is an insulator or an conductor? This is my reasoning, but I am not sure if it is correct: When...

Apologies if this is being posted in the wrong section! this is just a side thought I came across, it is not HW. In learning about magnetism, I know that a changing current in a wire creates a magnetic field. So why are wires in our homes/ anything with wires close together not constantly...

Homework Statement An uncharged metal sphere hangs from a nylon thread. When a positively charged, nonconducting glass rod is brought close to the metal sphere, the sphere is drawn toward the rod. But if the sphere touches the rod, the sphere suddenly flies away from the rod. Explain why the...

It is my understanding that fields store potential energy. That applies to both magnetic as well as electric fields. I know that the energy density also increases with the square of the norm of their vector value (at each coordinate). When I have an infinite current sheet, the math says[1] that...

Not sure where this particular question belongs. Do you know of any Cavendish type measurements of G, in which the mass (and ~density) of the attractors (gravitational sources) are controls, and the number of particles (fermions or maybe quarks+leptons) is the independent variable? The...

I've been looking for that question for months but no luck. According to the classical electrodynamics the attraction between two magnets is due to the inhomogeneous magnetic field acting on the atomic loop currents (through Lorenz forces). The homogenous field does not produce any attraction...

explained by the particle level ? Thanks in advance

Homework Statement By what angle, in seconds of arc, will a plumbline be pulled out of its normal vertical direction by the gravitation attraction of a 10-ton that parks 20 ft away? Do you think that this effect could be detected? Homework Equations I think (G*m1*m2)/r^2 The Attempt at a...

Thanks for reading this As protons go faster and fast in the LHC they have a greater angular momentum (that's not at all the right term) to go around in circles faster and faster as they reach near the speed of light that greater inward attraction towards the magnet to rotate around in the LHC...

The question: Is there a gravitational attraction between two atoms if they are located at a distance of several light years of each other? Or physics does not have the answer to this question yet? ) (Sorry if this question has already been discussed on the forum. Please send a link to the topic...

Hi, I was wondering whether it was posible with a formula to measure the distance to which two equal magnets start attracting to each other. I was looking at this web page https://www.kjmagnetics.com/blog.asp?p=surface-fields-101 and I am not sure if this is the right formula. I have two...

is magnetic repulsion and attraction is due to the bending of curvature of spacetime?

My understanding is the atomic model has electrons occupying shells and in particular numbers, but what's known about why they arrange themselves into shells and in those particular numbers? The teaching is that electrons have a negative charge and protons have a positive charge - but why do...

Homework Statement While solving a question on gravitation I had to consider a very thin spherical layer of a uniformly dense sphere. It's written in the solution that : "Then the considered layer is attracted to the part of the sphere lying within it (outer part doesn't act on the layer)...

According to my textbook The distance at which attractive fOrces overcome repulsive forces is called bond distance. I want to ask if I would say The distance at which repulsive forces overcome attractive forces is called bond distance Will it be correct?

Hello.This is probably totally stupid question, but anyway... Is it possible to create bag made of particles with very strong positive charge and electrons using attracting force between them? If theoretically at least in some parallel universe yes, then if we keep shooting electrons inside...

Hey guys, So, I was in my materials lecture today and something the lecturers and the tutors said was slightly confusing. We were talking about the repulsion and attraction force between atoms. This is all good as I can understand how if two atoms will repel each other if they get really close...

If electrons repel then why are particles attracted to each other so why do particles attract and what is the ratio of the gravitational attraction to the electric repulsion of both an atom and an electron? Thanks!

When an object, orbiting in circular path, experiences the sensation of being thrown outward away from the of circle. We often think that an outward force or centrifugal force is responsible for this trend. But it is wrong idea. Inertia is responsible for this. Since Earth rotates around its...

what happens if 2 massive objects are placed in an empty space. Does it attracts each other? Does any change happens in its position? If there is a force where did it come from?

I didn't study physics in college nor any other science major, but I love physics and read a lot about it. Still I find troubling contradictions in my understanding of Newton's interpretation of gravity. For starters, how can the force of gravity be directly proportional to the two masses? If...

If you have two particles of opposite electrical charge in proximity, what actually sets them in motion? As a an analogy, if you have two balls in either end of a tube and remove the air between them, outside pressure will push them together. What is the equivalent process at the particle level?

Homework Statement Two solid copper spheres of radii 1 and 2 cm are released from rest in free space, their centers being 20 cm apart. Estimate the velocity with which they collide Homework Equations density =mass/volume F=GMm/r^2 The Attempt at a Solution Find mass of each from density of...

Why does the nucleus' attraction to the outermost electron increase across a period? I have been told that this is because each time you go across a period one step to the right, you add one proton and so there is more positive charge, but isn't it true that you also add one electron ? and so...

Is the force of attraction between an electron and a proton in a hydrogen atom a example of action and reaction to which Newton's 3rd law applies?

I'm having trouble grasping some of the text in my textbook. In addition to proposing that objects (and the earth) fall because they are attracted by a force, Newton apparently claimed "that there is a force of attraction between any two objects with mass." Einstein went on to suggest "that the...

Homework Statement Consider two infinitesimally thin (i.e 1-D) wires of equal length ##L##, and at mutual distance ##d##. Consider the two configurations shown in attachment Estimate the van der Waals interaction between the wires, for ##d \gg L##, in the two situations where: (i) the wires...

This relates to a feat in a classic Thor comic. Thor is blasted by a Graviton Bomb and "is instantly subject to a gravimetric attraction akin to that of a neutron star.". He is then "pulled irresistibly down by the incalculable increase in local gravity and is quickly buried from view by an ever...

Mentalist/hypnotist Derren Brown has apparently made a series of videos called "Science of Attraction." I thought this example here was worth watching. Two separate groups of girls are shown a dating video of one guy. He say exactly the same words in both videos, but, in fact, they are two...

Hi all. New to physics forum and glad to be here. I have been referencing the site for a while now and have finally come up with a question i haven't been able to find on here. So I guess i thank all of you who are already on here for the help. Assumptions: -Imagine an infinitely...

Homework Statement After induction, the cola can has +ve charges on one end and the -ve charges on the other end. Now when we touch cola can with our hand, why does electrons start flowing through it and get grounded. Doesn't the +ve charges on the one end of the can attract the -ve...

if a hydrogen atom has only 1 proton and 1 electron what is the reason that the electron does not collapse onto the proton if there is a + and - charge?

I don't understant how the positive electrode can attract both electrons and the positive Li ions as they both flow to it. Also, the way to start the whole process is to let the electrons flow, right? (Close the circuit.) Without it, the ions also don't want to start flowing, although there is...

So the formula is F=Gm1m2/r^2. Could you substitute one of the mass values for an energy value since gravity attracts energy ? Or would this require a different equation?

The exciton is defined as a bound state of an electron and an electron hole. From what I've read, this state is described by Coulomb's law. Coulomb's law describes the interaction between two charged particles. So my question is: because an electron hole is not an actual particle, how does an...

Hi, the following two views appear inconsistent to me: In the infinite perfectly homogeneous universe: a) the net force of gravity is zero everywhere, so no energy is being exchanged and no particle is pulled in any direction whatsoever. b) the net force of gravity within a spherical...

Homework Statement Human tissue contains about 3*10^27 electrons per kg of material. Suppose two humans are located 1370 km apart and each has a mass of 60 kg. We now transfer 5*10^21 electrons from one person to the other. What will be the magnitude of the resulting attraction, rounded to the...

Homework Statement If the mass of the Earth were twice as big, and the mass of the moon were three times bigger, by what factor would the gravitational attraction between the two be multiplied? Homework Equations The Attempt at a Solution Ive used this formula and failed twice to...

Why do atoms repel when they are close to each other and react when they are far from each other??

Homework Statement The gravitational attraction due to a nearby mountain range might be expected to cause a plumb bob to hang at an angle slightly different from the vertical. If a mountain range could be represented by an infinite half-cylinder of radius a and density ρ lying on a flat plane...

Why do magnets attract ferromagnetic materials only? Why not other materials as well?

Why we don't question attraction of a positive and negative charge particles but we question attraction due to gravity. We say we do not understand gravity or what causes gravity or attraction. Isn't the attraction due to gravity similar to the attraction or repulsion between charged bodies...