Difference Definition and 1000 Threads

I am currently working on something and I would like to know something. When we connect two tanks and we have water flowing into Tank 1. Is it possible to make a connection between Tank 1 and Tank 2 so the water level in Tank 2 is higher than water level in Tank 1?

Homework Statement I apologize, this is not really a homework problem. I have an exam coming up, and I need to be able to explain the difference between a stationary/non-stationary quantum state in a qualitative way, and in what cases these states have time dependent probabilities. I am hoping...

say we have some wavefunction |psi> and we want to find the probability of this wavefunction being in the state |q>. I get that the probability is given by P = |<q|psi>|^2 since we're projecting the wavefunction onto the basis state |q> then squaring it to give the probability density. However...

Homework Statement Two waves travel next to each other for 100cm. Wave A passes through a glass container containing liquid. The thickness of the glass in total is 1cm and the width of the liquid is 10cm. The glass has n = 1.52 and the liquid has n=1.33. Wave B passes through a vacuum and...

I've been trying to figure out why my DC subtraction amplifier is not working, and am completely baffled. I have set up an op amp with no feedback resistors with voltages applied to both the inverting and non-inverting inputs as specified below. I previously had the op amp setup with a 10x gain...

Are spacetime and the gravitational quantum field (still hypothetical) separate entities? Would the gravitational field be more fundamental, one of the various entities from which spacetime as a whole is composed? Gravitons, which are believed to transmit the force of gravity, would surely be...

Homework Statement In a Young’s two-slit experiment a piece of glass with an index of refraction and a thickness is placed in front of the upper slit. (a) Describe qualitatively what happens to the interference pattern. (b) Derive an expression for the intensity of the light at points on a...

Pretty much as said; what is the practical distinction between Statistical Physics and Statistical Mechanics? The Wikipedia page for Statistical Physics has Statistical Mechanics as a subsection, but virtually all other subsections just talk about prominent figures, institutions, and...

Homework Statement Homework EquationsThe Attempt at a Solution (Sorry my poor English). I just don't understand why should the minimum path difference be 0.75 wavelengths for angles below the centerline instead 0.25 wavelenghts as it is for angles above the centerline.

Homework Statement Given the electric field E = (2x−y2)ax + (3z−2xy)ay + 3yaz, and the piecewise linear path joining the points A(−2,1,−1), P(2,1,−1), Q(2,3,−1) and B(2,3,1), find −∫E⋅dl from A to P − ∫E⋅dl from P to Q − ∫E⋅dl from Q to B along the straight line segments. Homework Equations...

I have a difference equation which is given as: ΔP = e^P [1] where we can re-write ΔP as: Δ P = P_2 - P_1, where the subscripts indicate two distinct discrete time indices. What I would like to do: is to convert this into a continuous time expression and solve it, if possible. In order...

It is said that a coherent light beam is described by a single wave because all the individual waves add up in phase to produce a single big wave. It is also said that entangled light is described by a single wavefunction...

Homework Statement A dipole is centered at the origin, with its axis along the y axis, so that at locations on the y axis, the electric field due to the dipole is given by E vector = 0, 1/4πε0 * 2qs/y^3, 0 V/m The charges making up the dipole are q1 = +6 nC and q2 = -6 nC and the dipole...

Homework Statement In what direction is your friend from the starting point after skiing 3km east and then 1.5km north? Homework Equations angle = tan-1(1.5km/3km) = 26.6 degrees The Attempt at a Solution they want the answer in terms of degrees "north of east " not sure what the rules are...

Matter has a wavefunction associated to it. But what about light? Does it have both a electromagnetic wave described by Maxwell's equation and a wavefunction described by Schroedinger's equation? Or is the electromagnetic wave considered to be the wavefunction of the photon? I read somewhere...

1. The problem statement, all variables and given/known dat What is the difference between Newton's 2nd and 3rd law of motion? Are they related as in if I applied force so that an object accelerates, would it exert the same amount of force towards me? Homework Equations F=ma

Hi! I am having problem in understanding the difference between phase and group velocity clearly. In my textbook phase velocity is given by ω/κ while group velocity is by dω/dκ. What is the difference between these two terms? Thank you!

On Wikipedia, an article appear from which I quoted below. Here is something called Bose-Einstein correlation due to interference of wave character that I confuse with quantum entanglement. I want to know if these BEC correlations are entangled or separable states...

Hi Experts, I'm preparing piezo electric generator project, but when I'm searching for piezo disc for my project, i came across different sizes of piezo electric disc, but i didn't found any datasheet, My question is what's the output voltage/power difference between different diameter...

what is the definition of phase lag and phase difference in waves and how are these 2 related?please explain in simple words and with real life examples. Please explain phase,phase lag and phase difference from scratch.

One condition for wave interference is that the sources of the waves must be coherent, which means they emit identical waves with a constant phase difference. I can understand that identical waves means they have the same wavelength. However, I don't understand what is a constant phase...

how to calculate phase difference for spherical waves?how to say whether they are in phase or out of phase? in sinusoidal we can easily say whether they are in phase or out of phase just by looking at it,but how to do the same for spherical waves?

Okay guys I am a beginner (in electrostatics as i just started studying it) I am thorough with kirchhoffs rules/laws But one thing which bugs me is this doubt So in the book that i am reading It says that even if the potential difference is zero,current flows through a wire I don't get how I...

what is phase difference and how to visualize it? i can understand it pretty well for sinusoidal waves,but how to visualize it for other type of waves like spherical waves,plane waves etc?

What is the difference between "Physics" (1 volume, 1156 pages) and "Fundamental University Physics" (3 volumes) by Alonso Finn? Is the former 3 volumes bound as one or a revised edition?

Homework Statement Q: Two conducting balls of radius 0.1 m are situated 3m apart in free space. Electrons are transferred from one ball to another at a rate of 10^13 per second. How long does it take for a p.d of 100 kv to develop? Homework Equations where ε0 is the electric constant...

Hello, Can you tell me what is the difference between direction and dimension?

Is it correct to say that Chsh does not need an average but as soon as AB-AB'+A'B+A'B' is 4, 0 or -4 it means it is nonlocal ?

Homework Statement Find the potential difference ##V_A– V_B## for the circuit shown in the figure. Homework Equations Kirchhoff's laws. The Attempt at a Solution If we assign potentials to junctions starting by setting ##A=0## Current ##i_1## flow through each vertical resistances and ##i_2...

Homework Statement There is a spring with 2 masses with a combined mass of 0.69kg. The vertical oscillation has a frequency of 1.5Hz. The amplitude of the oscillation is 30mm. Now this spring is attached to a horizontal support rod that can be made to oscillate vertically. how do i work out...

Homework Statement When two same lamps are connected with the same battery. Their lighting will be greater when they are connected in series or parallel? Homework Equations Series U=U1+U2+U3+... I=I1=I2=I3... Parallel U=U1=U2=U3... I=I1+I2+I3+... The Attempt at a Solution The answer is when...

Homework Statement This is from an exam for my current course in "Mechanics 2", from a couple of years ago, which means that the correct answers are given for checking results, but without further explanations. I'm confused about part (c) where my results do not correspond with the given...

What is the difference between AA and AAA batteries? Will the output voltage of 3 AAA and 4AA be same?

This is a 2 part question and I guess it applies to the brushed case as well. 1.What is the difference between an electronic speed controller (ESC) and a brushless motor controller show below: ESC: http://www.robotshop.com/en/lynxmotion-12a-multirotor-esc-1a-bec-with-connectors.html Brushless...

electrons in terms of absorption. To move from a lower to a higher energy level, an electron must gain energy. Oppositely, to move from a higher to a lower energy level, an electron must give up energy. In either case, the electron can only gain or release energy in discrete bundles. Now let's...

What would be the difference in measuring voltage across the resistor in this position and when resistor and capacitors positions are in different order? And why? http://people.sinclair.edu/nickreeder/eet1150/PageArt/RCcircuitSimple.gif

I know that this question has been asked many times before on this forum, but on every existing thread either the question or the answers, or both, were too vague. I understand that inertial mass is defined as the property of an object to resist change of its velocity, that is the mass that...

Homework Statement Pritesh is taller than Davina who is taller than Alicia. The difference in height between Pritesh and Davina is the same as the difference in height between Davina and Alicia. The total of their heights is 300 cm. How tall is Davina? Homework Equations Now trial and error...

Hello Forum, I have heard about voltage signals and current signals in the context of electronic circuits. What is the difference? Is a voltage signal what is measured by a voltmeter between two points/wires while a current signal runs on a single conductor and is measurable by an ammeter...

Homework Statement Temperature, pressure and volume measurements performed on 1 kg of a simple compressible substance in three stable equilibrium states yield the following results. State 1 (T1=400 C , V1= 0,10 m3, P1=3 MPa) State 2 (T1=400 C , V1= 0,08 m3, P1=3,5 MPa) State 3 (T1=500 C , V1=...

If I have a human specimen with a WEIGHT of: 61.14 kg, and then divide by 9.8 m/s^2 (g), then the specimen has a MASS of: 6.24 kg. So...is this wrong, or right? Is there one type of kg for weight, and another for mass? As I understand it: weight is a measure of force, whereas mass is a...

Hi, I'm new to Physics Forum and I can figure out what it seems should be an easy problem. I have two DC power supplies both of which are putting out 24vdc. In my mind I should be able to test for potential difference between the (-) of one and the (+) of the other and read how many volts they...

I don't really understand the difference between uniform circular motion and rotational motion. I know that uniform circular motion deals with a body that is orbiting around a central point, with a centripetal force that is causing it to move in a circle. I know that rotational motion uses...

Homework Statement A +4.0 μC-point charge and a -4.0 μC point charge are placed as shown in the figure. What is the potential difference, V_A - V_B, between points A and B? (k = 1/4πε_0 = 8.99 × 10^9 N · m^2/C^2)...

A rod and Cylinder with a same axis of rotation relative to its body have different rotational inertia equation. WHY? Thanks in advanced.

Homework Statement Now, I know the centre of gravity can change depending on how close to uniform the gravitational field is, and it is where the weight appears to act from. But, what is the centre of mass? Ok, it is a constant; doesn't change; and in an uniform gravitational field the two...

What is the difference between psi(x;y) and psi(x) in 2D BO approximation for particle in a box. how to show psi(x;y) in MATLAB

What is the difference between physics and chemistry? I asked my Science teacher (who teaches Physics in senior years) and he said that chemistry was basically applied physics.

What's the difference between ##\Bbb R^{4}## and ##\Bbb R^{1,3}##? I know that the first one has metric Kronecker delta ##\delta_{ij}##. Does the second one have Minkowski metric ##g_{\mu \nu}##?

Homework Statement So, my teacher said that the biggest phase difference is pi. But what if you have two waves arriving at a point, such that the instruction from one wave is a phase of (7pi/4), and from the other is (3pi/4), then the phase difference is (9pi/8), which is larger than pi. So...