even Definition and 650 Threads

I understand that sound is a propagating pressure through a medium. We produced pressure and it’ll propagate through the medium as “sound”. How can we use this model to understand everyday-life experiences like opening a chips packaging and the packaging makes a sound, and alike. In the chips...

My idea was straight forward calculation: $$\begin{align*}\bar { \psi }' ( x' ) \gamma ^ { \mu } \partial _ { \mu }' \psi ( x' ) &= \psi^\dagger\gamma^{0\dagger}\gamma^0\gamma^\mu \partial_\mu'\gamma^0\psi = \bar\psi\underbrace{\gamma^0\gamma^\mu\gamma^0}_{=\gamma^{\mu\dagger}=-\gamma^\mu}...

Homework Statement [/B] A random variable x has a probability function ##G(t)##. Show that the probability that ##x## takes an even value is ## \frac 1 2 ( 1+G(-1))##Homework EquationsThe Attempt at a Solution [/B] ##G(t)= \sum_{k=0}^\infty p_k t^k ##... ## 1=P(X=even)+ P(X=odd)##...1 ##G(-1)=...

Homework Statement Determine function $$f(x) = \log(\sqrt{x^2+1}+x)$$ Is odd or even. Homework Equations ##\log(a+b) = \log(a) + \log(1+b/a)## The Attempt at a Solution First I thought it is a even function without considering the x at the end, which of course isn't the actual case. Then I...

What evidence is there that gluons are even particles? They were originally proposed to supply an extra quantum number to comply with the Pauli exclusion principle. So gluons are supposed to carry a color-anticolor charge in order that the quarks in baryons would add up to the color white. But...

Hello everyone! I wanted to get a little advice here. I am in India and studying UK education system (IGCSE). So, I didn't take physics as a subject and now I am regretting it because it's too late. Can I do a degree in physics even if I don't have it? I have pretty good knowledge about the...

I know the result that if ##\lim a_{2n} = L = \lim a_{2n-1}##, then ##\lim a_n = L##. I'm wondering, can this be generalized to series? i.e., if ##\displaystyle \sum_{n=1}^{\infty}a_{2n-1}## and ##\displaystyle\sum_{n=1}^{\infty}a_{2n}## converge, then ##\displaystyle \sum_{n=1}^{\infty}a_{n}##...

Sometimes I get so bored that I just try to calculate certain experiments I've heard without know the solution. Like using the basic formula to calculate the speed of the moon around the Earth. This time I tried to calculate the differences between 2 clocks, on put on the highest building in the...

Homework Statement Q1. a) In relation to Fourier analysis state the meaning and significance of 4 i) odd and even functions ii) half-wave symmetry {i.e. f(t+π)= −f(t)}. Illustrate each answer with a suitable waveform sketch. b) State by inspection (i.e. without performing any formal analysis)...

Other than Helium do Noble gases with even nuclear spin form superfluids? Is there a simple quantum mechanical explanation why the difference below of the Melting point and Boiling point of the Noble gases is roughly the same value? A yes or no would suffice. From...

It's really confusing if the frictional force IS an external force.. My guess is the frictional force isn't an external force and therefore I can observe the momentum conservation even with friction if I carefully measure the velocity right before and after the collision. But I'm not sure about it..

Hi everyone. I'm new to the forum so sorry if the title or the "sub-topic" is wrong, and I tried my best not to break the posting guidelines, if I did, let me know. (First of all, I want to clarify what's my stance on all of this, I'm not a proponent of these ideas; in fact, I'm always sceptical...

Two highways intersect at a right angle. Two recording lights are located at points A and B, 200 meters and 300 meters away from the intersection on one of the highway. A car, C, approaching the intersection along the other highway, is being tracked by the two lights.Let θ be the angle ACB(see...

A set of numbers 1,2,...,4N gets randomly divided into two groups with equal amount of numbers. Calculate the probability:7 a) Each group has an equal amount of odd and even numbers, b) All numbers that are divisible by N, to fall in only one of the groups, c) All numbers that are divisible by...

https://www.msn.com/en-us/health/medical/adults-can-make-new-brain-cells-even-in-their-70s/ar-AAvvLHZ?ocid=spartandhp Whether or not adults make new brain cells has been a constant topic of debate. A new study published today offers hope for our aging brains with the discovery that adults...

I'm not talking about the vertical difference in temps at altitude, such as at ground level versus at 1000 ft; I'm talking about where the land rises. So, that even at local ground level it's colder. I was watching a news report that indicated rain all across our province, except where the...

I tried to answer it and got 3/4 or 6/8 after using the union set operation for 4/8 or 1/2 and 3/8, based on what is being asked in the problem...

In the nuclear physics, why do we say that the total angular momentum J is zero when the proton number Z and the neutron number N are both even?

The question is prompted by a claim raised in another thread that "There is good reason (theoretically) to believe that linearity fails at high enough energies." I've put this with an A prefix because it is going to be about some damned difficult maths, I know. But please try to avoid the...

Is c++ even used nowadays? I'm am currently learning it in school and I wonder if it's used in the corporate world.

Hello there, I have the following set of data Wins 6 Losses 13 Average Win 14.33% Average Loss -4.47% I want to know how to figure out the maximum average loss at which I can still break even. I have tried a few different things but cannot figure it out...

Since every point on a circle has exactly one other point (opposite its diameter) whose tangent is parallel, can it be said (proven?) that a circle is composed of an even number of points? It's messing with my head to think of infinity as even. I realize one-to-one mappings in infinite sets...

I watched a show on TV about the Oort cloud, that featured a visual. I think it mentioned something like several trillions with a t objects surrounding the Sun outside the solar system. And the image showed just that, a cloud so dense and thick you couldn't see the sun. Combine that with all the...

Traditionally, derivatives are taught as a function that have... "Whole" transitions. Take the following example: If you have the function f(x) = x^2, we find that f'(x) = 2x, and that f''(x) = 2. In other words, it has a first and a second derivative. But what would it even mean to take a...

http://imgur.com/cUNs2z7 In this book I found by chance on Google, the author claims that “solutions of the wave equation only take the form of functions (...) in one and three dimensions. In two dimensions solutions are more complex”. Then, at the end of the paragraph of interest (which I...

Hi, Can someone please explain as to why light beams attract or repel each other even when they don't have charge. Seems like it behaves like two current carrying parallel wires. There is very little material about this which goes completely above the head. Thanks

Hi, I have been upset lately due to getting a low mark in one of the most important courses in my life. I am a fourth year nuclear engineering student. I have been an average student since high school. my uni gpa is average too. I don't know if it's the way I study is what I am doing wrong or...

Homework Statement Homework Equations cos2x = (1+cos2x)/2 sin2x = (1-cos2x)/2 The Attempt at a Solution I believe you would use the double angle formula repeatedly but that is very tedious; is there a more concise way to solve the problem?

Three times the smaller of two consecutive EVEN integers IS four less than twice the larger. What are the two integers? My set up: x and x + 2 are the two consecutive even integers. True? Here, x is the smaller integer and (x + 2) the bigger integer. True? The equation is 3x = 2(x + 2) - 4. Yes?

Hi, I am just clueless about this. I turned my computer off with the battery at 100% ( I was using power cord with outlet). I disconnected from the server at the coffee shop, went to " Shut Down" on Windows icon menu, turned machne off. This morning I turn my PC on and the battery is at around...

I'll try to make this short as possible. I am a pilot and work in some science fields as side jobs (Chemistry) Due to numerous moves and school transfers when I was young, I never got a fair start learning math and did not learn physics at all. It has put me at a real disadvantage as I...

Homework Statement In Complex Fourier series, how to determine the function is odd or even or neither, as in the given equation $$ I(t)= \pi + \sum_{n=-\infty}^\infty \frac j n e^{jnt} $$Homework Equations ##Co=\pi## ##\frac {ao} 2 = \pi## ##Cn=\frac j n## ##C_{-n}= \frac {-j} n ## ##an=0##...

I do. lets talk about it.:) mod.please fix my typo seriuosly

Wouldn't the first thought be that we would be burned to a crisp if we where hit with all the light(in our path) across the span of the entire universe simultaneously? It seems there could be paradoxes even before the advent of relativity. Or maybe it was shown mathematically that the energy...

Hi, I am trying to find all the even numbers in [FieldName] in SQL Server. My query is : SELECT [FieldName] FROM Table WHERE [FieldName] % 2 =0 ; I only get an error message . ( I am using SQL Zoo, since I don't have SQL server available at the moment. Only message I get is that the query is...

Hello! (Wave) According to my notes: For the solution of problems with differential equations it is often useful to expand to a Fourier series with period $2L$ a function $f$ that is initially only defined on the interval $[0,L]$. We could define a function $g$ with period $2L$ such that...

Horgan: Do you still think string theory is “not even wrong”? Woit: Yes. My book on the subject was written in 2003-4 and I think that its point of view about string theory has been vindicated by what has happened since then. Experimental results from the Large Hadron Collider show no evidence...

DYEL is a huge put down in my area, ie do you even lift bro. If a guy says it to you its like spitting on your life. Its meme status and guys use it to gain superiority...in their own minds. Looking for cool graphics so I can provide a counter T shirt with a DYEP bro, as per title. This is...

I'm trying to solve https://www.hackerrank.com/challenges/equal which is how to make an array's N elements equal through operations restricted to (1) adding 1 to N-1 elements, (2) adding 2 to N-1 elements or (3) Adding 5 to N-1 elements. I started out by writing some test cases that might be...

Homework Statement "Consider the sequence ##F_1##, ##F_2##, ##F_3##, . . . , where ##F_1 = 1##, ##F_2 = 1##, ##F_3 = 2##, ##F_4 = 3##, ##F_5 = 5## and ##F_6 = 8##. The terms of this sequence are called Fibonacci numbers. (a) Define the sequence of Fibonacci numbers by means of a recurrence...

Hello. The entropy S is a state variable or state function as the integral of dS = dQ/T is a path-independent, provided that the path is reversible process path. However, such a path-independency of the integral breaks down when the path includes irreversible process. So, I guess we can only...

I am currently 16 and from Scotland. I plan on completing a masters in physics once I go to university, however I am now starting to wonder what fields of physics are the best to go into. My preference would be to do research, which leads to my other question of how possible is it to have a...

What is the sum of all the even integers between 1 and 101? Is there an easier way besides using the formula: (B-A+1)(B+A)/2? It just takes too much time.

Negative number multiplied by itself an even number of times gives us a positive number. Why does log to -10 base of 100 not equal 2? thanks in advance.

Homework Statement Prove that if p(x) has even degree with positive leading coefficient, and ## p(x) - p''(x) \geq 0 ## for all real x, then $$ p(x) \geq 0$$ for all real x Homework Equations N/A Problem is from Art and Craft of Problem Solving, as an exercise left to the reader following a...

Most of it isn't helping so much. :sorry: I am convinced all "philosophy of xyz" where xyz is a subject, economics or physics is just trashing the subjects foundations and trying to prove it isn't sound.

First term of the progression is 3 & the common difference is 4 Find the sum of the first 20 terms of the progression that is obtained by removing the terms in the even positions of the given progressions, such as the second term,fourh term, sixth term. Formula preferences For the sum of an...

Homework Statement Link: http://i.imgur.com/klFmtTH.png Homework Equations a_0=\frac{1}{T_0}\int ^{T_0}_{0}x(t)dt a_n=\frac{2}{T_0}\int ^{\frac{T_0}{2}}_{\frac{-T_0}{2}}x(t)cos(n\omega t)dt \omega =2\pi f=\frac{2\pi}{T_0} The Attempt at a Solution Firstly, x(t) is an even function because...

Homework Statement Using a single 74x138, build a 3-bit, active-low, odd-parity detector. (Y0-Y7 are selected by "b2 b1 b0" in binary. Also the nibble "0 0 0" is considered even parity) You may use one NOR gate and one NAND gate, with arbitrary fan-in(>1). Label input variables "I2 I1 I0" and...

So in most of intro physics rolling questions, the masses are assumed to be rigid. So if I roll a sphere on frictional plane, it will move forward and the friction force will help stablize it until pure roll. However, how can there even be a friction force assumed in these problems? The...