Difference Definition and 1000 Threads

class MyClass: def set(self, x, y): self.x = x self.y = y obj = MyClass() obj.set(10, "Integer") print(obj.x) print(obj.y) class MyClass: pass obj = MyClass() obj.x = 10 obj.y = "Integer"...

Problem Statement: Difference between frictional force and force of friction. Relevant Equations: Difference between frictional force and force of friction. Difference between frictional force and force of friction. Are these two terms equal?

Problem Statement: Potential difference is the difference in the quantity of charge in both potentials. How does the magnetic field creates this difference of charges ? Relevant Equations: None Hi, I was reading electricity and found that the difference in potential of both end is the...

I did a little research, but I'm not fully confident if what I found is correct. Cytotoxic: Anything that kills cells (including cancer cells). Cytogenotoxic: Anything that mutates the DNA of a cell (can lead to cancer).

As part of my project I was asked to use the finite difference method to solve Schrodinger equation. I see how you can turn it into a matrix equation, but I don't know how to solve it if the energy eigenvalues are unknown. Are there any recommended methods I can use to determine those...

I claim that waveguides are resonators because a resonator is defined as a device which can produce you normal modes of some ' mathematical object' you're looking for, which in waveguide's case is Electromagnetic fields ( waveguide can produce normal modes called TE and TM ). Am I right?

What is the difference between time dilation (t is the stationary reference frame) t = Description: If two successive events occur at the same place in an inertial reference frame, the time interval 􏰋t0 between them, measured on a single clock And this equation for time, if we take t' as the...

A friend is writing a story in which somebody steals a frozen, non-fertilised ovum from an egg bank, meaning to do something with it (not sure what). The thief then forgets about it and finds the tube containing the ovum in her pocket a few days later. She looks at it under a microscope. The...

So I am getting a fatal error on a tally that contains a universe definition in it. f12:n (10<(u=1)) sd12 1.0 e12 0.1 20.0 the error specifically says "fatal error. invalid universe format in f card bin 1 tally 2." However, this input is able to run on MCNP5 without experiencing...

Don't really know how to go about this exercise as I've been given no information for it I tried googling similar problems but couldn't find any If someone could give me a process to try I will then try to solve it here in this section, thanks.

random <- function() { sample(1:10, size=1) } > rep(random(), 4) [1] 8 8 8 8 > rep(random(), 4) [1] 2 2 2 2 > replicate(4, random()) [1] 3 6 10 3 Why is this difference?

If the table (with the mirrors, beamsplitter, etc.) is rotated 90 degrees, one arm will get shorter (due to lengthcontraction) because its longitudinal speed goes from zero to 30 km/s (our speed around the sun) and the other arm will get longer as its speed goes from 30 km/s to zero. So with a...

My Solution: ##\underline {\text{Limiting Distribution}}## ## P^2 = \begin{bmatrix} 2/3 & 1/3 \\ 2/3 & 1/3 \\ \end{bmatrix} \begin{bmatrix} 2/3 & 1/3 \\ 2/3 & 1/3 \\ \end{bmatrix} = \begin{bmatrix} 2/3 & 1/3 \\ 2/3 & 1/3 \\ \end{bmatrix} ## So, the limiting distribution of ##P## is ##P##...

what would cause the phase difference ?

M1(50,000)/q (0.4) - M2(50,000)/q (0.4) = 0.025 Is there a special charge for singly charged ions?

I have some questions regarding the sign of potential difference. For example, given the literal definition as the difference in potential between two locations it should be possible for potential difference to be negative if the final potential is less than the initial, but while reading texts...

We know that the sum of the two vectors is represented by the major diagonal. Now, if I draw the vector diagram, it turns out to be a diagonal of an entirely different parallelogram. So, my first answer was (c) none. But, I noticed that when parallelly shifted, it turns out to be the minor...

In the USA, a bachelor is required to be accepted into a PhD program. A bachelor takes 4 years, and a PhD takes about 5-6 years (https://www.postgrad.com/study-in-usa/phd-in-usa/). If you have a Masters degree it may take 1 year less (which is weighted out with the duration of the master). So it...

Summary: Do chemists think differently than physicists? And should I Change my subject in University... Hey guys, I'm asking myself this question in hoping to find myself in life… some advice and ideas would be really helpful. I'm from Europe and I'm actually studying chemistry. I still Need...

Hi, reading this link galilean spacetime a doubt raised to me: which is the difference (if any) between ##\mathbf E^1\times\mathbf E^3## and ##\mathbf E^4## ? I believe each space there (spaces involved in the cartesian product too) has to be regarded as equipped with standard Euclidean structure

The problem relates to birefringence and crystal optics. What is the difference between O and E rays to S and P polarizations? Is O-ray just a different name to S-polarization and E-ray a different name to P-polarization? if not, what is the difference?-

In class we do Science and I have faced with the problem between Weight and mass. Tutor told us that the weight is the force that causes everything to move. Mass is the kg .Why then, people ask other people what weight are you? Explain please. Thanks

if binding energy per nucleon is proportional to the number of nucleons in the range of the nuclear force. then why is the binding energy for carbon 12 higher than nitrogen 14

Hi everyone, When an electromagnetic wave passes through a material, then depending upon the atomic structure of that material it polarizes that material. There is another definition of polarization in physics which says that polarization is the direction of oscillating electric field in EM...

Hi, I've a question about electricity in the following scenario: consider an accumulator (e.g. a 9V battery) and an analog/digital voltmeter having a probe connected to the accumulator + clamp and the other to the ground (for instance connecting it to a metal rod stuck in the ground). Do you...

. The above are some of the typical problems related to Poisson Process. I need to understand the difference between time, inter-arrival time, and arrival time in this regard. Say, we start our counting from 9:00 AM and count up to 10:00 AM. Image-1: arrival process. 1. 1st call comes at...

We're given the equation qB=mv/r which is simple enough. I just don't know how to find the velocity given the acceleration through a potential difference. I tried using the radial acceleration equation given to me but I end up with the square root of a negative...and that breaks math... I...

I was reading about this, and they seem the same. Of course, if they were the same, they wouldn't have different names.

They all seem to mean the same thing. I personally have been using locus.

They seem to mean the almost the same thing, with a field allowing subtraction & division whereas a ring only needs addition & multiplication. Is that a ring can mean "addition" & "multiplication" in some way that isn't between numbers per se, but between whatever abstract things can be dreamed...

What is the difference between the two? Also, as another question, for enthalpy, is it correct to define it to be the sum of internal energy and flow energy or is there another understanding for it? Thanks in advance

<Moderator's note: Please upload images for otherwise the links might get broken.> Here is the backward difference table given in my book https://prnt.sc/n2965l But it seems this table is wrong. I have marked my comment in the screen. Can you please tell who is right ?

I have lately been working with Numerical Analysis and I am using Finite Difference Methods for Ordinary and Partial Differential Equations by Randall J. LeVeque. It was recommended to me by a friend of mine (physicist) https://epubs.siam.org/doi/book/10.1137/1.9780898717839?mobileUi=0&...

Homework Statement The charge of density 3.0 μC/m fills a long cylindrical region having a 2.0-cm radius. If point A is 1.0 cm from the symmetry-axis and point B is 2.0 cm from the symmetry-axis, what is the potential difference VA – VB? a . –25 mV b. +42 mV c. –42 mV d. +25 mV e. +20 mV <-...

Homework Statement The charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis). a . 2.7...

I was going through these two documents: https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/symposia_1/downloads_11/4_DMFW_1.pdf http://www.partinfo.co.uk/docs/140 My primary interest was to understand why and how Dual Mass Flywheel (DMF)...

Homework Statement Through what potential difference must an electron (starting from rest) be accelerated if it is to achieve a speed of 3.0 x 10^7 m/s? a . 5.8 kV b. 2.6 kV c. 7.1 kV d. 8.6 kV e. 5.1 kV Homework Equations me = 9.11 × 10−31 kg |qe| ≡ e = 1.6 × 10−19 C F = ma Eq = ma V = Eq/r...

Homework Statement Hi, I am new to MATLAB and have an assignment where I have to construct a Hamiltonian matrix, apply boundary conditions, then find corresponding eigenvalues and eigenvectors for the electron in a box problem. I am stumped where to start. From our class we learned that you...

I had to find the phase difference between sound waves created by two sources at different distances from a given point. I found the correct answer to be about 13.4. Would any other answer of the form (13.4 + 2npi) also be correct, assuming n is a non-zero integer? Or is 13.4 the only correct...

Hi everyone, I am researching how numerical simulations have evolved over the years in nuclear reactors for assessing the thermal hydraulics inside the reactor core. I have found vague information in regards to the three different main numerical techniques but want to learn more. So far...

I am simulating random angles from 0 to 2π with a uniform distribution. However, if I take the differences between random angles, I get a non-uniform (monotonically decreasing) distribution of angles. In math speek: Ai = uniform(0,2π) dA = Ai - Aj dA is not uniform. Here is a rough image of...

What is the difference between spin repulsion and electrostatic repulsion of an electron? Is this the same mechanism?

Hi. In order to explain the motion of an (accelerating) electromotor, we need the Lorentz force which itself is not one of Maxwell's equations. Conversely, if we use the same electromotor inversely to generate electricity, Faraday's law (which is a Maxwell's equation) and the resistance of the...

Homework Statement Im trying to get a head so reading next term work i know how both operate but just wanted to double check are both basic motors and generators made up of the same components? Homework Equations yes The Attempt at a Solution I was sure but just wanted to check, so i know...

Hello all. I have a question about gasses and pressure: Is there a way to calculate how strong a material making up a balloon has to be to withstand a given pressure difference between the inside and outside? In other words, if I have a balloon I need to fill to a pressure of 10atm inside vs...

What's the difference between distance and the square of the distance? Many Thanks

Homework Statement A capacitor consists of two large metal disks placed a distance ##s## apart. The radius of each disk is R ## (R \gg s)## and the thickness of each disk is ##t##. The disk on the left has a net charge of ##+Q## and the disk on the right has a net charge of ##-Q##. Calculate...

Homework Statement Do five positive integers exist such that the positive difference between any two is the greatest common divisor of those two numbers? Homework EquationsThe Attempt at a Solution I found four such numbers, ##\{6,8,9,12\}##. I did this in an ad hoc way though without any real...

From the rotation curve of spiral galaxy it is found that the entire mass is not concentrated at the centre but for large distance from the central core it varies linearly with r for which the velocities(rotational) of the objects far from the central core remains nearly constt. and near to the...

Homework Statement An isolated parallel-plate capacitor of area ##A_1## with an air gap of length ##s_1## is charged up to a potential difference ##\Delta V_1## A second parallel-plate capacitor, initially uncharged, has an area ##A_2## and a gap of length ##s_2## filled with plastic whose...