Effects Definition and 1000 Threads

If a negatively charged Styrofoam plate is brought towards pieces of paper placed on an insulator (ex. a piece of paper), attraction occurs. Repulsion occurs if pieces of aluminum foil, which is a conductor, are placed on an insulator. What would occur if the pieces of paper and aluminum foil...

Hi, so for example in the figure below the missing mass squared has been calculated under the assumption of the detection of a pi+ particle decaying from a K+. What I am wondering is what is it that's bounding all the decays at 0.122 GeV2? And for the decays at all, what is e.g. bounding the...

My simple description of gravitational waves is that they are due to the relativistic principle of locality, i.e. the fact that the action of gravity is not instantaneous, something that you can’t see from the tidal effects in Newtonian physics. Is it correct? I've also found a comment...

Do effects like velocity time dilation and gravitational time dilation occur in probabilistic QM, are SR and GR compatible with QM?

If I understand correctly, quantum effects become very small as the object in consideration becomes larger. My question: what causes this? For instance: does it have to do with the relation between the quantum objects in the macro object, or does the math show that quantum effects become...

I like a to ask a very simple question. I have read about time-dilation when it comes to SR. So, like: (1.) A and B are are rest and close to each other. (2.) B starts traveling at .5C relative to A, away from A, in a straight line. (3.) B comes back at .5C towards A. Now, according to SR, A...

Hello everyone, sorry to bother you. I was just looking around for a list of all the Quantum phenomenon effects and couldn't find one quickly. I know two of them such as tunnelling and locking but the rest of the ones I've heard of I can't remember. Also there may be ones I don't know about...

Hi everyone. So I have been learning about equilibrium recently in class... and suppose I have the following reaction: A(s) + B(aq) <-----> C(aq) + D(g) [Note: in parentheses, I indicate the state of my substances] So I was told recently that pulverizing my solid "A" would not change the...

We now know two things distort space time: relative speed [we call it time dilation and length contraction] and gravity. Gravity IS the 'curvature' of space and time. "Mass tells spacetime how to curve; spacetime tells mass how to move." [John Wheeler, I think.]

I just went out to my car to retrieve my laptop. My car is at about 1 degree C, my house is at about 20 degrees C. I soon noticed condensation forming on the screen and it occurred to me that condensation was probably forming inside as well on the electrical components. The combination of...

Is there any difference between these two terms; Coriolis effect and Gyroscopic effect ?

How are the effects of antimatter on gravity different than regular matter?

Hello Forum, I have been studying special relativity and its unique phenomena (time dilation, length contraction, mass dilation, etc.) I would like to make sure that my understanding of these interesting phenomena is correct. For example, the length of an object is not an absolute. What we...

I was just looking through a few different solutions in Griffiths EM and I must have not realized it, but do bound and free charges both contribute to the overall electric field? For example: when dealing with a capacitor with a dielectric between it, one of the solutions wants to find the...

Forgive me if I sound ignorant, but is it possible that quantum affects (value of h, why physical dimensions appear to come in discreet chuncks, etc) all stem from our mathematics (which originated as counting numbers -quantum steps). I do understand that calculus was invented to help remedy...

I've been googling around, and I can't seem to find a straight answer to this: Do eddy currents generated within an inductor core change the inductance, the impedance, or both? My reason for asking is to understand whether more or less eddy currents will change the resonant peak of the...

Not that this article here can compete with mathematical descriptions or "real" physics but it is well written and fast to read and may provide some answers to the repeating questions about the different consequences of mass.

Hi all, I've got a high school special relativity physics test coming up in a week and thought I should post here instead of under homework/coursework as I don't really have any set questions that I'm asking. My problem is that I can explain the visual effects we learned but not with enough...

Are the four classes of quantum mechanical phenomena for which classical physics cannot account independent of one another or can one derive one or more phenomena from other(s)? These according to the Wiki are: Principle of uncertainty; Wave-particle duality; Quantisation of certain physical...

In Dirac's "The Principles of Quantum Mechanics," ket vectors are multipled by complex numbers (c1 |A> + c2 |A> = c1 + c2 |A>) and I was curious what affect this has a) on the ket vector and b) on the entire system? Also is (c1 |A> + c2 |A> = c1 + c2 |A>) equal to (|A> + |A> = |A>)? Thank you...

1. Homework Statement Homework EquationsThe Attempt at a Solution My answer to (b) was that power supply would have an internal resistance which is not negligible and will affect results. The correct answer is that shorted lamp A would cause damage to the lamps/supply. How is lamp A...

I'm preparing a poster presentation on the following paper for a physics course: http://t.co/xiCLV7Y0ZH I do not understand how figure 4 tells us about the red/blue shift. Just from the deflections of the peaks of the airy beam, as well as the deformation, how are we able to infer that there is...

Hello, I work with Particle Systems for special effects (Houdini FX) and I would like to build a electric arc system. I can offset the positions of every particle by certain rules/conditions or expressions and maybe someone here, Knows a expression or a good link to something like this. Some...

Homework Statement [/B] A low flying Earth satellite travels at about 8000m/s. For the satellite, the relativistic factor $$\gamma = \frac{1}{\sqrt{1-\beta^2}}$$ where $$\beta = \frac{v}{c}$$ is close to 1 because v<<c. Estimate by how much gamma actually deviates from 1 by expanding gamma in...

I have a DC source. then I connect a capacitor from the +ve to ground. if all connection are made from ordinary , copper for example, wires then electrons flow from negative to positive terminals.So electrons from the negative side of the capacitor would flow to the positive. I wonder what...

How far down can a nickel ball of radius r and temperature Tn melt into the ice block of temperature Ti? Watch the video and state your assumtpions...

Given the following diagram: The conductor(C) of known volume(##V##) and resistance(##R##), passes a uniform magnetic field(##B##)at a constant velocity(##v##), via the following formula: ## \epsilon = -vBL## the induced EMF can be calculated. This conductor acts as a power source to a certain...

Hello. I'm looking for an advice in constructing a model where sawtooth modulated mechanical frequency perpendicularly applied to a rotating disc(gyroscope). Thought: the slow rise of the sawtooth will be less resisted by rotating disk than the quick drop. Thanks

Do you find modern digital special effects convincing and realistic? Will they look outdated 20 years from now? Perhaps I see some digital special effects and don't realize they are digital. However, big digital landscapes and architecture (e.g. "Bladerunner" or the "Indiana Jones..." series...

This question and answer are posed in Kim Stanley Robinson's novel "2312". My question is, is this all made up? Or might it be accurate?

[Mentor's Note: Post moved to it's own thread] I there a tidal swell or circulatory effect in the atmosphere caused by the moons gravity ?

Hi! I'm a bit confused about the source of drag in a 2D flow (actually I'm talking about air). I heard that if the viscosity of a fluid is 0 then there is no drag at all (no pressure and no friction drag). I think I understand why viscosity affects friction drag, but why does it have an effect...

Flying two aircraft (parallel and synchronous). From the first emitted light beam. As this beam reaches the second plane? Perpendicular (FIG. 1), or with a bend (FIG. 2)?

I've been checking a university's descriptions of its research groups and their interests, where I encountered the phrase "Topological effects in Particle Physics" which had no explanation. I searched in the internet, but I couldn't find anything. Could anyone explain about such effects and...

In my study I deal with tubulars frequently, and it is well known how to calculate stresses due to external pressure on a (hollow) uniformly-thick cylinder (i.e. a pipe). Suppose now that I have a cone, tapering downward like a V, with a hollow cylindrical interior (like the inside of a pipe)...

When a pressure vessel is subjected to internal pressure of 3 bar and external pressure of 4 bar..Is it right to say resultant pressure is 1 bar external? Does both cases (3 bar int& 4 bar ext,only 1 bar ext) produce the same result considering all other factors like thickness,material etc constant?

Homework Statement [/B] A conducting square frame of side a and a long straight wire carrying current I and located in the same plane as shown in the figure. The frame moves to the right with a constant velocity v. The emf induced in the frame will be proportional to Homework Equations [/B]...

I am looking for a reference to discuss the effects of resistor size on alpha, the temperature coefficient of resistivity. If we use the linear R=R0*(1+alpha*(T-T0)) alpha is a material constant, presumably for bulk-type resistors. Will alpha change as size (cross sectional area) of the resistor...

Both string theorists and loop quantum gravity theories have proposed that space-time may be something other than the perfectly smooth, perfectly local space of classical general relativity, which can potentially lead to path dependent phase alteration of light from a common source due to the...

What kind of effects that provides to the power lines due to the harmonics? Please consider those harmonics are generated through electronic equipments? Thanks in advance.

In double slit experiment with a single source,I am finding the traces of one slit when I have the other one open. I think this is due to diffraction effects.May I know how to tackle this?

Homework Statement Show how a constant interfacial shear stress mk < k decreases the forces required for uniaxial upsetting using mohr circles with decreasing m (<1). Assume a slab force balance. Homework Equations Mohr Circle Equations dσx/dx = 2mk/h σx + P = 2k The Attempt at a Solution...

I've read that the Tsar Bomb used a lead casing for the second and third stages of the bomb instead of a uranium casing. A uranium casing would have resulted in fast fusion but would have created too much fallout. Typical Hydrogen bombs use uranium casings. A uranium casing would have indeed...

I try to find answer to quite basic question. Let's imagine neutron star and object with mass of 1 kg located far from the neutron star. Total energy of the object is ##E = U_g + mc^2##, for case when its velocity is zero and and ##U_g## is potential energy of gravitation. The neutron star have...

If say a hundred or more objects, at a human scale, are connected by a string, and they can be made to synchronize in an oscillation, could that be considered a bose einstein condensate?

Homework Statement I'm asked to qualitatively draw two curves, one on top of the other: the resulting signal in Q4’s collector with and without the effect of the speedup capacitor (see attachment).Homework EquationsThe Attempt at a Solution I used the net to find the graphs in attachment 2. Do...

After a wrist injury I had to stop lifting weights. This was annoying so I decided to make an arm brace that would transfer the weight of a dumbbell through my forearm rather than through my hand and wrist (with the help from my local metal works). I've now got the brace and its perfect, aside...

Hello, after much thought I decided to ask here about the specifics of 2 of the effects of G.R., which are a bit unclear to me. The scenario is - one pulsar and one neutron star orbiting their barycenter as you can see from the image below (ignore the binary pulsar title of image, it's just what...

Homework Statement A small solid sphere of mass M0, of radius R0, and of uniform density ρ0 is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls...

hey, What would be the things that effect the displacement of an object when fired from a slingshot? I assume that is would be mass, distance the rubber is pulled back, the speed of release for the rubber and the angle. But in what was would they effect the displacement. What are the formulas...