List Definition and 494 Threads

There is a an encyclopaedia of all the different inflationary models. But I am wondering is there is a similar list of modified gravity models ?

Hello, A few years ago I heard about a list named the "10 characteristic experiences of physics", may I know if a such list exist? A few years ago, at the physics workshops at the Palais de la découverte, I saw the so-called "triple point of water" experience. The experimenter told us that...

$\tiny{412.4.2}$ (a) List the elements of the subgroups $\langle 20\rangle $ and $\langle 10\rangle $ in $\Bbb{Z}_{30}$. (b) Let $a$ be a group element of order 30. (c) List the elements of the subgroups $\langle a^{20}\rangle $ and $\langle a^{10}\rangle $. should be easy ... just never did...

nmh{2000} Let A be a matrix with characteristic polynomial $ p_A(t) = (t − 1)^3(t − 5)^2(t − 6)$ (a) List the possible Jordan Canonical forms for A. (b) Suppose all eigenspaces are one dimensional. What is the Jordan form for A in this case?

> A person who works on small scale electrical and mechanical systems > The design and construction of such systems > From toys to hand-held devices such as phones What job titles fit this description?

i have a value that is generated as the max value for example from this list [0.6000001, 0.3, 0.3, 0.4] clearly the maximum value is 0.6000001 but python does not seem to be able to recognize this value as the maximum. i have tried so many ways to solve it but to no avail. even when changing...

Homework Statement I got a solution for finding eigen values. It evaluates to: (Lambda)^3 -12(lambda) -16=0, Then it that the list of possible integer solutions is: +-1, +-2, +-4, _-8, +-16 (i.e. plus minus 1, plus minus 2 and so on). I can't understand, why he says list of possible solution...

I just came across this website and thought it might be of interest to the PF participants. https://beallslist.weebly.com/ The following describes what it is all about...

When I type "drag coefficient" in Google, and view some of the images, the standard list of geometrical shapes come into view, such as this one: https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/14ilf1l.svg/220px-14ilf1l.svg.png If we take the cone for example, there is a drag...

I plan on taking a multitude of AP classes next year. I would like some books that I should buy for good study.

If caesium 133 frequency for its hyperfine structure is 9 192 631 770, and hydrogen is 1 420 405 751.7667 what are the frequencies for the other elements and their isotopes? Is there a list on line some were because this would be a long list. Any help on where to look on line would be...

I have an array that looks like A=[0,0,1,1,2,5,6,3,7,7,0,0,1,1,2,5,6,3,7,7] since the "0,0,1,1,2,5,6,3,7,7" part reapeats itself I don't need the second part so for a given array it should give me A=[0,0,1,1,2,5,6,3,7,7] I can't use the set() function and I don't know what else I...

Is there an online program that for a given function value and range, it lists the f(x) and x?

STEM Bibles By STEM I mean science, technology, engineering and math. By a bible, I mean a book which is comprehensive, big and heavy (both physically and intellectually), authoritative, and generally highly respected in the community as the standard book that contains more-or-less everything...

Dear All Please could you kindly help? I am new to this forum, kindly excuse me for asking. The nth term for the following set of numbers is required. If someone could please guide me, I would be grateful. Thank you. Suggestion to solve the nth term suggestion for the following list please...

I'm trying to get the items I already purchased in public view is there a way to do that? Here is my wish list, by no means complete. It only goes back as far as 2015 but I've had this same...

Hi all, so I am a junior studying mathematics/stats BS and I am trying to put together a list of grad schools to apply to but I don't know how many to apply to that would be reasonable. I really only want to apply to PhD programs because I am married with a child and I can't afford an expensive...

Any clues of the plots in Star Wars Episode IX (after the Last Jedi)? I hope they would introduce more fearsome adversaries.. so far .. the most fearsome character was Darth Maul.. But he was not that scary.. he even looked a bit boring... Star Wars must introduce characters that can send...

I have a probability question which has cropped up while playing a game called "Shopping List" with my sons. The game is played like this: you pick a fixed shopping list of 10 items, and three other players do the same. You have all of the items on cards, face down on the floor in-between the...

Hey! :o I want to write a progarmm in python that reads two lists A, B and checks if the one of the lists is a circular shift of the other list. The result is either True or False. I thought to do something like that: if sorted(A) == sorted(B): C = True else: C = False But it cannot...

Homework Statement Basically, as the thread title says, I've got to implement a Priority Queue with a Doubly-Linked List in Java. This is an excerpt from the instructions for the assignment: I've assumed that priority is given to larger integers (since it wasn't specified in the...

I am a senior in a 5-year physics program (B.S. in Physics, Astrophysics concentration and minor in Mathematics) with a 3.65 GPA (3.72 in my Physics major) at a not-so-well-known private institution with fifteen months of full-time relevant (to astro) research experience, eighteen months of...

My objective is to make a list of functions and afterwards be able to make operations with those functions. Hyfield[list_, bits_] := Module[{i, auxList, Hy}, auxList[a_] := List[]; For[i = 1, i <= bits*2, i++, auxList[a] = Append[auxList[a]...

Hello I have used a random number generator to create a list of uniformly random numbers, between 0 and 1. The usual check that I do is sorting the list, and histograming the difference between the following and the previous one. The shape of the histogram should follow an negative...

What courses are you taking first semester?

Hello, would like to derive a length of list of random numbers in which I may find some special sequence of few numbers with some probability. For clearness I give an example: I have two generator of (pseudo) random numbers with same range of numbers, let's say (1-k). First generator give a...

Is there a computer friendly list with the known bodies in the Solar System astroid belt, that contains their physical properties, position and velocities?

Books on multivariable calculus that I often see get good recommendations are, Vector Calculus, Linear Algebra, and Differential Forms by Hubbard and Hubbard Vector Calculus by Colley What are other good books with some material on differential forms like Hubbard and Colley? Books by Edwards...

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...

Hi there everyone :smile: I'd like to have a list of all the instances where a singularity appears in physics, e.g., in relativity, causing the black hole thing. Specific cases where \frac{x}{0} appears. For instance, I heard that there is another case in quantum mechanics, or quantum...

Hello, I have a bachelors degree in mechanical engineering. I just recently decided I wanted to get a masters degree in physics but that won't happen cause I'm a homeowner paying a high mortgage while working half a year. While I only work half a year I doubt I could pull it off but it's...

I'd like to find a smatphone App for taking quick voice notes for To-Do lists. I have the App ColorNote on my phone right now, but it's awkward to use for taking notes and To-Do lists, and it doesn't seem to have a voice interface. What I'd like to be able to do is use a quick click on my...

That is, with Noether's theorem, it feels to me the conservation of angular momentum somewhat stands out because the measure is more of a derived one. That is, rotation of something is really more of an interplay between inertia of the constituent particles and the forces that hold them...

Can anybody give me a list of all cross products in physics. I have the following in my list: Torque $$\vec{\tau}=\vec{F}\times\vec{r}$$ Angular momentum $$\vec{L}=\vec{r}\times\vec{p}$$ Velocity $$\vec{v}=\vec{\omega}\times\vec{r}$$ Biot-Savart law $$\vec{dB}=\dfrac{\vec{i...

Hey I was wondering if anyone had an idea of where I should start reading to learn a little about astrophysics or theoretical physics (or anywhere else you think I should start if that seems too challenging to start with). I don't consider myself to be very educated, I grew up in a devoutly...

how would be able to delete the middle D: so far I deleted the last two, which i do not want. These are my values in the nodes: 9->1->2->4->10->6->8 //part F will tranverse in the middle and delete the middle void insertMiddle(Node *nn) { while(nn->next->next->next != NULL) { nn =...

This is a class assignment that has been puzzling me for a few hours. I need this to print out the values from the passenger array. My code so far prints the values from my aircraft class perfectly but not from my passenger class. Please see my output below: How do I make the output display...

So I have a linked list a->b->c->d and I want to make another list b->a->d->c in a systematic way by interchanging pointers. But for some reason it isn't working. All I did was move the link between b and c into b to a. Then the link from a to b, changed to a to d. Then the one connecting c...

Homework Statement [/B] Build a linked list with values of 1, 2 and 3 The Attempt at a Solution class ListNode(object): def _init_(self,x): self.val=x self.next=None root=ListNode(1) root.next=ListNode(2) root.next.next=ListNode(3) print(root.val) I keep...

List contains 1, square root of 2, x and x squared and the list range is 4. I guessed 2 but it is not correct.

The option to choose to look at the list of unanswered threads seems to have vanished. Is this a PF problem or is my computer messed up?

I just noticed this item in Nature. I only found out because I noticed on the arxiv that a paper titled "Can the Many-Worlds-Interpretation be probed in Psychology?" had apparently been approved for publication in the "International Journal of Quantum Foundations", and I want to know whether...

I was hoping I could get some feedback from anyone who might have insight into the grad school application process. I've applied to 11 schools so far, but I don't know how to tell if they're all a bit too optimistic. I was hoping that someone could recommend a "safety" school or two. About me...

I am trying to use C++ (eclipse in Ubuntu OS) to read USB connection. Usually, on the terminal window, I can use command "lsusb" to see the list. Now, I want to do the same way with C++. can anyone help? Thank you very much.

I am planning to self-teach myself Trigonometry and all the other required fields before jumping into calculus. I have compiled a list of books that I have researched and would like your opinions and recommendations. Books: Precalculus Mathematics in a Nutshell: Geometry, Algebra, Trigonometry...

Hi everyone, In Carl Sagan's Cosmos there's a short animation video illustrating the shape of all human ancestors, starting from single cell organisms, morphing towards the modern humans. I've searched for a complete list of known human ancestors like that one, but I couldn't find anything like...

I am applying to OSU and when filling out the common app there are 10 slots for activities. I have taken online physics classes since the 9th grade. Would this be something I could put down as an activity?

I'm replicating the Faraday Effect as a high school experiment. Can anyone direct me to Verdet constants of water, air, olive oil and table salt for lasers of wavelengths 405nm, 532nm, and 650nm? I'm using the constant as a variable using different materials but I cannot find a specific value...

So I was reading a book that warned me about mathematical objects and how they can be confused and muddled up for something else while being an entirely different thing..So, As far as I know these are distinct mathematical objects (which I think I know). Is it a valid list and what are some...

I was making a little bit of a thought experiment with a simple program and wanted to double check it with you guys. The idea was to utilize basic functionalities of python, regarding lists. Then the goal is to find out and print the number of times that a certain element occurs inside a...