Reading Definition and 614 Threads

Hi, I love logic and reading, I like math ( especially calculus ), learning useful or funny things, I can draw well, I'm new here and don't know a lot about physics ( just my curriculum), I'm in my senior year of high school and I want to study engineering, maybe mechanical engineering. I'm...

The magnifying glass is widely used as a low-tech assistive device for reading by the visually impaired. As magnifying power increases, the lens diameter must decrease, greatly constraining the field of view. But a magnifying mirror achieves high magnification over a broader field of view, and...

From my knowledge, the optical pyrometer determines temperature of a body based on the visible part of the heat radiation spectrum emitted by a body. Now the iron piece was red hot inside the furnace as well as outside the furnace, so it is emitting heat radiation in the visible part both while...

cpu 8086 segment code ..start mov ax,data mov ds,ax mov ax,stack mov ss,ax mov sp,dno mov es, ax start_2 mov ah, 0x0a mov dx, buffer int 21h cmp al, 0 je print_lines inc word [count] mov si, buffer mov di, line mov cx, 100...

How do we read and understand a wood cutting blade specification (e.g. below) ? Is the grinder spacer flange nut for 16 mm center diameter metal cutting disc can safely be used for 20 mm one of such blade?

If I were to read up to and including Chapter 3, would I be prepared enough to read Spivak's Calculus or at least some single variable calculus text based on proofs? I'm asking because I plan on taking Real Analysis later and I'd like to gain a better understanding of Calculus. I have read...

I 'v worked as a physics teacher in a famous senior school since I got my degree in 1996. And, reading is one of my loves.

Summary: I am looking for suggestions on an informative read surrounding nuclear energy I am a junior year physics student at UCSB looking to go to grad school for nuclear physics and eventually work with nuclear energy. My curriculum at UCSB does not offer any explicit classes surrounding...

I'm fairly certain that the first one is marked correctly. Should the second one be where there are red marks or is it correct as it was marked previously? Any advice with graph reading?

What do you recommend to read first, Supergravity by Freedman or A First Course in String Theory by Zweibach? For future consideration.

This is the beginning of an online reading course of the book "Statistical physics" by Reif, volume 5 in the Berkeley physics course, using PF. We'll start with chapter 3 and loop back to the initial 2 chapters if necessary. All questions should be specifically about what is written in the this...

The Burst and Transient Source Experiment Earth Occultation Technique https://www.semanticscholar.org/paper/The-Burst-and-Transient-Source-Experiment-Earth-Harmon-Fishman/b4e57f91de6fec73fa680bcd7d6efbdf0de10bee In **Appendix B**, the authors derive the equations for the occultation times...

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Hello everyone! I'm currently an Aerospace major student entering my third year of college, studying in northern Mexico. After enrolling in a summer school by Mexico's national space weather lab, I have been offered an opportunity to participate in the development of an ionosonde antenna in my...

Does anyone have any good laypersons reads to get a good summary the dark matter versus modified gravity? Thanks

Hey guys, I am currently in 11th grade. I am just used to solving Olympiad problems and proving some random theorems. I think i should start studying some reasearch papers for ny own benefit..any suggestions for where to start with? Suggest from intro to intermediate level...will be fine...

\newcommand{\printNum}[2]{% #1 #2% } \newread\readEng \newread\readEsp \newread\readLineNo \newcount\myLineCount \myLineCount=0 \newcommand{\printNumRow}{\loop\global\advance\myLineCount by 1\read\readEng to \Eng \read\readEsp to \Esp \printNum{\Eng}{\Esp}\ifnum\myLineCount=\linenum...

Hi folks, Hope everyone is keeping well. I've recently read the headlines of "strong evidence for new force of nature" pertaining to the Muon g-2 experiment. Interesting as I find the article in the BBC linked below: https://www.bbc.co.uk/news/56643677 I'd love to read some...

Hello A few weeks ago (March 7) I asked how to have Javascript read a data file of numbers into an array. I now understand why this is such a challenge when running a code on a web page, locally. I have since found a sufficient workaround. I hope I can share it in the hope that someone can...

I've seen various articles say that a typical person can read a book within five hours. These are presumably non-academic textbooks and things like biography, non-fiction, etc. The page length cited often is 300 pages. Sure, I think I've done that occasionally, but I'm a slower reader than...

implicit none!do not use an undetermined constant character(len=18)::fname character(len=22)::fname_2 character(len=19)::fname_3 character(len=7)::yyyymmd character(len=1)::dash character(len=1)::d character(len=1)::f1 character(len=1)::f2 character(len=1)::f3 character(len=1)::f4...

We were prescribed Goldstein, Taylor and Marion/Thornton for our first course in analytical mechanics, and I'm about to finish up the course but I feel like I have not gotten a good physical, intuitive grasps of the concepts, so I've been trying to read the texts a bit more. Taylor and...

I need help to get the percentage current loading on this transformer with the following parameters transformer size is 500KVA Primary voltage is 11KV Secondary voltage is 415v power factor is 0.8 current in Red phase is 315A Current in yellow phase is 302A Current in blue phase is 317A Neutral...

The present setup is a step-down transformer. Im thinking if n1 is decreased to match or be less than n2, then it will be a step up transformer. so A. (but answers say B)?

Does power reading works when learn physics fields,mechanics,aeorospace,electrics etc?

I got to know of this book through Freeman Dyson's obituary. Just wondering, is it useful in studying Physics (it seems to cover everything), do people even use it these days? I understand differential equations are basically half of Physics. By the way, this book is really old, are there any...

Hi, I used to use MATLAB for this kind of thing, but now my pc broke and I need to run some scripts. I have a .txt file structured like this 10 -2.34454 12 -2.34566 14 -2.34677 ... ... and I want to store the data in two variables: the first is the "counting" (10, 12, ...) and the second is...

I am always trying to read textbooks (physics, in courses, or independently), and every time I end up in one of these situations: The book gets too technical for me to understand, or mentions something I do not know. The book goes on for too long and gets boring after the introductory chapters...

Right now I am learning coding on Java using IntelliJ IDEA. I have coded before on C++ and then Python, so I understand a little on Java. I'm not really sure how exactly I would change code so that it would read input from the terminal? Would I have to use a Scanner for this? I can post the...

Not sure how to start off this question I'm confused how to begin if I do not the exact pressure on either pipe A or pipe B Only thing that I can deduce from this is that if pipe A exerts a smaller pressure than before then the mercury column on the left side would rise i.e. the new...

Hi everyone! How do I go about solving this problem? I tried working out the gauge pressure using this but I have a few unknowns which won't make this possible such as what is the length of x which I labelled in the figure Any help would be appreciated! Thanks

Hi I have a funky problem I have been working on for over a day, it is supposed to be quite simple, but I have funny result. What the program does is to pick out one of the five records(of structure) stored in the file, modify it and store back into the file in the same position. It supposed to...

Having some trouble in answering part b) of this question I managed to find the right answers for part a) if that is maybe needed in part b) which I got 26.7 kPa, 18.8 kPa, 38.6 kPa and 13.9 kPa for levels A, B, C and air pressure respectively Not too sure what part b) is technically asking...

What would you say is essential reading for those of us who want to understand how exactly is QFT benefiting from QI? Can anyone give a summary of what is happening, and where to start reading? (at postgraduate/entry-research-level).

Hi PF! I am trying to read all the .csv files in a folder. When I execute OFdata = readtable('/home/josh/Documents/NASA/PSI_DATA/Double_Drain/ICF1-9/OpenFOAM_DATA/*.csv'); I get a general error. However, replacing the asterisk with the file name, it load no issue. I've seen online how to...

I have written a C++ code in Visual Studio 2019 that requires an input tab-delimited text file and outputs a text file that is also tab-delimited. The data within the text file are stored in a vector and then it will perform calculations, whose results will then be written in a text file as...

The metaphysics in my fantasy novel incorporates elements of quantum physics like the observer effect and entanglement. I'm writing a scene in which the protagonist is reading as a high-schooler in 2004. What book can I show her reading that would tell the reader she knows some about this stuff?

"The “stage” on which the universe goes is the three-dimensional space of geometry, as described by Euclid, and things change in a medium called time." -Feynman Lectures Do the 1st two lines mean that the thing in which everything moves around is the 3 dimensional space...am i interpreting it...

As in constructions that consist of a membrane of some textile and are sustained by pressurized air bombs. A paragraph mentions that in the face of strong winds or snowfall the internal pressure rises... but i don´t understand exactly why is that. I´m just curious and would like to know. pd...

Hi, I just finished up with Riemann Geometry not to long ago, and did something with complex geometry on kahler manifolds. In your opinion what would be a next logical step for someone to study? I am very interested in manifold theory and differential geometry in general. I'm somewhat familiar...

Hi I'm sure i understood this a week or so ago, and I've forgot the idea now. I'm just really confused, again, how you read the commutator relationships of from the action ? many thanks (source http://www.damtp.cam.ac.uk/user/tong/qhe/five.pdf)

I need help in writing a Fortran code to read in the numeric data, but the file contains initially some character in few initial lines and later the numeric data has been written. please help me in writing the Fortran code. I will be thankful for the kind help...

I know the following equations for if the damping ratio is less than 1: $$\sigma = -\zeta \omega_n$$ $$\omega = \sqrt{(1 - \zeta ^2)\omega^2_n}$$ I am given the following circuit that I built on LTSpice: Measuring the voltage between node 2 and ground (blue), and the voltage Vc4(t) (green) I...

My reasoning is that 1)at initial condition, net force of stick on the beaker is equal to the weight of the weight minus the buoyant force applied by the water to the weight, which is the tension force in the string. The recorded weight should be equal to mass of beaker + water + net force of...

Hi All, While trying to read a matrix from data file using fortran90 code ,I get garbage values and a backtrace error. Error termination. Backtrace: #0 0x7f4a4de3631a #1 0x7f4a4de36ec5 #2 0x7f4a4de3768d #3 0x7f4a4dfa4d42 #4 0x7f4a4dfa6ad5 #5 0x7f4a4dfa80f9 #6 0x56040bbeae57 #7...

There are quite some pop-sci books (by Greene, Smolin, Carroll and others) that deal with the "nature of time". Why does time appear to flow? Why is there a special moment, the "now"? Does simultaneity in SR imply a block universe? Why time-symmetric laws but a time-unsymmetric universe? Does...

I'm new to fortran coding and trying to read a file called "data.dat" with data like a triangular matrix 0.1 0.1 0.2 0.1 0.2 0.3 0.1 0.2 0.3 0.4 0.1 0.2 0.3 0.4 0.5 using the code PROGRAM matrix IMPLICIT NONE REAL, DIMENSION(5,5) :: a INTEGER :: row,col,max_rows,max_cols max_rows=5...

Hey, there was an MCQ question in our term test paper regarding measurements and it was about what the reading was of a vernier caliper. But the least count of it wasn't given. As it was already showing a reading, I was kinda confused on how to define it. Is there any method to define a vernier...

Homework Statement I have successfully opened and discarded the headers. Then I calculated the distances between point 1 and others and the minimum distance as well. However, I am not sure how to make the code work for more than 4 points. The attached text file is what I am trying to read and...

Hi, I am using fortran to read specific columns from a .csv file. the rows in each columns are different, so I wish to read columns wise with a do loop. say, I wish to read from A1 to D20 initially(4 columns of 20 rows), then later f1 to h35 (3 columns, 35 rows). how do I read particular columns...