What is Introductory: Definition and 366 Discussions

Introductory diving, also known as introductory scuba experience, trial diving and resort diving are dives where people without diver training or certification can experience scuba diving under the guidance of a recreational diving instructor. Introductory diving is an opportunity for interested people to find out by practical experience at a relatively low cost if they would be interested in greater involvement in scuba diving. For scuba instructors and diving schools is it an opportunity to acquire new customers. An introductory diving experience is much less time-consuming and costly than the completion of autonomous diver training, but has little lasting value, as it is an experience program only, for which no certification is issued. Introductory scuba diving experiences are intended to introduce people to recreational diving, and increase the potential client base of dive shops to include people who do not have the time or inclination to complete an entry level certification program.

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  1. Coffee_

    Two questions about introductory EM confusions.

    QUESTION 1. I have asked this question here a while before but it seems that I have still not gotten it. My apologies to the previous answerers of this one, I guess it's just me being slow. We defined the electromotive force ##\epsilon## for a charge that moves along some path while some force...
  2. Y

    Calculus Introductory Calculus book/online course for self study

    I would like to learn calculus from the start. I have had pre-calculus and have basic ideas about limits and derivates(though not very rigorously). Which book should I use? I have the book "Calculus The Easy Way" by Douglas Downing. I also have access to Calculus One by Ohio State University...
  3. W

    Introductory Material for Relativistic Boltzmann Equation

    I’m searching for an introduction to relativistic Boltzmann equation. (Sorry, I know this is a question about learning material) I’ve read an excellent script from David Tong about non-relativistic kinetic theory (from Liouville to Navier-Stokes using Boltzmann equation (see link below)...
  4. MidgetDwarf

    Is Kepplar and Kokenlow introductory mechanics for me?

    So I am math major and I chose to take 3 calculus based physics courses instead of 1 cal physics and 2 other science disciplines for cc transfer. I have completed calculus 2 recently and will start linear algebra in the spring. Eventually I will take Calculus 3 with Ordinary Differential...
  5. J

    Introductory Rotational Motion Question

    I'm beginning the chapter of Rotational Motion and Angular Momentum and it says the following which got me confused: Source: http://cnx.org/contents/031da8d3-b525-429c-80cf-6c8ed997733a@8.32:68/College_Physics When I was introduced acceleration at the beginning, it was stated that an...
  6. K

    Motion along a curved path -- introductory

    1. "William Tell is said to have shot an apple off his son's head with an arrow. If the arrow was shot with an initial speed of 55m/s and the boy was 15m away, at what launch angle did Bill aim the Arrow? (Assume that the arrow and the apple are initially at the same height above the...
  7. moriheru

    Introductory Books for Research in Bosonic String Theory

    I am looking for introductiory books on gauge theory and conformalfield theory and polyakov integrals for research in Bosonic string theory. Any other material recommendations for String theory that are necessary for bosonic string theory or heterotic string theory are definelty apreciated. To...
  8. A

    Best Way to Learn Introductory Signal Processing

    Hello PF'ers, Does anyone have insight on the best way to learn Signal Processing? I am new to the subject and feel totally lost in my course. Our professor has a teaching style that doesn't work for me. He isn't teaching from a textbook and the notes don't fully explain things. Successful...
  9. _N3WTON_

    Introductory Differential Equations Textbook

    Ok, for my differential equations class we are using a textbook called "An Introduction To Differential Equations and Their Applications" by Stanley Farlow. The book can be found here: https://www.amazon.com/dp/048644595X/?tag=pfamazon01-20 and I must say that I 100% agree with the assessment...
  10. S

    Message Passing interface introductory question

    Hello, I have just started to learn myself parallel programming specifically MPI. I know that this is going to be a silly question. I am trying to run the most basic 'hello world' program : program example1 implicit none !--Include the mpi header file include 'mpif.h' integer...
  11. T

    Sig figs introductory physics course

    I was reading a problem my brother was assigned in his introductory physics course. The problem specifically asks to give the velocity from viewing a graph. The velocity is 2/3 m/s and it asked to give it in two significant figures. So I thought it would be .66, however the online site he was...
  12. L

    Dark matter -best introductory books

    Hello fellows, Properly introducing myself into dark matter so in the quest for book suggestions from those of you who are into the topic. Thanks in advance
  13. C

    An introductory book on general relativity

    hi fellas, I want my undergrad thesis on general relativity. I need a good book on einstein field equations and its exact solutions to work with. also a book where are some solved problems and some exercises to guide me to right track any suggestions ? regards
  14. Y

    What should i do after an introductory course in robotics mechanics an

    heyy guys i have done a course on introduction to robotics on edx.org ... now i want to go to the next level in the field ... so could u please direct me to any books or moocs which can help me reach the advanced level... thanks ø
  15. S

    Searching for an introductory Textbook on Fock space

    Hello Everbody! I want to learn Fock-space. Can somebody point me to a useful textbook where the basics are covered? Or even a good textbook where a chapter or two cover it? Many thanks in advance!
  16. T

    Solid Introductory Text to Ordinary Differential Equations

    Hi, I am taking (ordinary) differential equations as a summer course and we are studying from a horrid textbook, in my opinion. Just curious if anyone might be able to suggest what is considered to be the "standard" introductory text on ODE. While I'm certainly interested in PDE, I don't...
  17. R

    Programs Free online introductory classes good method of choosing an eng.major?

    I am an upcoming freshman. I will major in engineering. When applying to the school I chose mechanical because of its "versatility and stability in the job market." (I don't fully understand the meaning of these phrases; I get my knowledge from anecdotal experience when browsing forums). I may...
  18. A

    Introductory Simple Harmonic Motion Problem

    Q: When a sound wave with a certain intensity is detected by the tympanic membrane, the amplitude of the resultant motion is 1.0 nm (1.0 x 10-9 m). If the frequency of the sound is 600 Hz, what is the maximum speed of the membrane oscillation? My answer: 1)Vmax = wA (where w= angular velocity)...
  19. F

    Another introductory calc problem

    Given a function f(x), I'm wondering if the slope of the secant between points a, f(a) and b, f(b) is equal to the average of the derivative at a and b. Mathematically, I want to know whether: \frac{f(a) - f(b)}{a - b} = \frac{f'(a) + f'(b)}{2} is true. I can see that it is for...
  20. F

    Optimizing Page Dimensions for Minimum Paper Usage

    "The printed area of a book will be 81 cm2. The margins at the top and bottom of the page will each be 3 cm deep. The margins at the sides of the page will each be 2 cm wide. What page dimensions will minimize the amount of paper?" (Calculus and Vectors, Peter Crippin et al., 158). [I added...
  21. E

    Difficult Introductory Electricity Circuit Problem - Capacitors

    Difficult Introductory Electricity Circuit Problem -- Capacitors Homework Statement The Attempt at a Solution This problem was very difficult, and the most I could do was re-arrange the circuit into a make-shift Wheatstone bridge with all capacitors instead of resistors/voltmeter...
  22. S

    Introductory Quantum HW (Angular Momentum)

    Homework Statement Consider a three-dimensional system with wave function ψ. If ψ is in the l = 0 state, we already know that Lzψ=0. Show that Lxψ=0 and Lyψ=0 as well. Homework Equations [Lx,Ly]ψ = i*h-bar*Lzψ The Attempt at a Solution I'm having trouble figuring out where to...
  23. Radarithm

    Need an introductory topology textbook

    I've been thinking about this for around 7 months now, which is way too much; Munkres seems like the "typical" introduction to topology book (kind of like how Griffiths is the "typical" E&M text), and various people (from the reviews over at Amazon) make it seem like it is an undergraduate level...
  24. Radarithm

    Intro Calculus Textbooks: Spivak & Larson

    What introductory calculus textbook do you recommend? Is Spivak's book good or is it too hard? What about Ron Larson's?
  25. R

    Organized way of setting up (introductory) physics problem

    I did not post this on the homework forum because they required to use the template. First, I have been using the "Known____Unknown______Equations" format; however, I feel this is not organized well enough for me. Then, I tried "Variables____Components_______________Equations" format. Do...
  26. S

    Tutorial In Introductory Physics: charge

    link to problem: http://www.csu.edu/chemistryandphysics/msabella/ccli/UpdatedLabs/physics2-calc/HW%20packet.pdf I don't under part two of question two on the assignment with the Case C and D. my gut instinct tells me that they are equal, but I do not have justifacation and when I look back...
  27. G

    A good introductory book [physics]

    Hey PF, I'm really getting into physics and I'm want to explore and learn more about physics than what i just did in class during my last semester in High School. My class mostly about motion, projectiles, energy, work, etc. very basic stuff considering it’s my first introduction to physics. But...
  28. S

    Introductory physics textbook: which to choose? =)

    Hello so lovely people! I present my self: Ali, 12 years old from Niger, I decided to start learning physics on my own.Some people first recommended me to read a book titled "Conceptual physics" to get the sense of what we are doing physics, I have read it and it is excellent! Now I try to go...
  29. P

    How Do You Calculate Current Flowing in a Wire Given Electron Count and Time?

    The question is: What current is flowing in a metal wire if 3.0*10^18 electrons pass a given point in a time of 0,10s? I know that 1 electron has a charge of 1.60*10^-19 I also know that one coulomb is 6.24*10^18 Lastly I know to find current I need to use the formula Q=I*t, but change it...
  30. D

    Best introductory books on the mathematics of relativity?

    I was looking for a self-study book that is accessible by an high-school student (11th grade) for general relativity. I read reviews on "A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity" but unfortunately, it isn't available here, in India...
  31. S

    Introductory analysis question

    I've split the proof for part a) into 3 parts: here's what I have thus far: 1) to prove H is an upper bound consider: H < 0 as an upper bound for S. We take H = -1 and hence H^2 = 1 and 1 \leq 3. 1 is in the set S and hence H < 0 is not an upper bound which implies that H > 0 is an upper...
  32. M

    On the teaching of introductory physics

    I am a junior in high school enrolled in an AP Physics B course, and as you are probably aware the curriculum consists exclusively "classical physics". I understand the value of easy calculation in teaching physics without calculus, but I am concerned as to whether or not an education in...
  33. M

    Why is Vi - Vf used to calculate voltage in circuits?

    My question is why did they choose to calculate the voltage across a circuit element as vi - vf because it seems contradictory. More detail is in the document. Someone please answer because this has been bothering me. THank you.
  34. S

    Introductory Fluid Mechanics book.

    Could someone recommend me a good Introductory Fluid Mechanics book? It's only an introductory course so it doesn't have to be too comprehensive at all. Thanks.
  35. O

    What are the measurements and gravity on Planet X inhabited by the Xinbar?

    Hello, sorry if this is an easy question, but I don't quite get it. Here it is: Planet X is home to an alien culture called the Xinbar. The planets diameter is twice as large as the Earth's and made out of the same stuff (i.e., the densities are the same). The Xinbar are made out of the...
  36. Astronomer1

    Introductory Quantum Physics/Mechanics Homework Help

    Hi everyone. In my class we are now learning about Quantum theory & the whole "shananigans". Yesterday we talked about orbitals (s, p, d, f, g). In one of the classes my Physics teacher said that the letter "l" (lowercase L) indicates the sub-shell and "m (sub) l" the location of the orbits...
  37. C

    Best introductory self-learning physics guide?

    Hi, what would be some of the best self-learning University physics introductor materials, books, (perhaps online video courses) you could recommend? I’ve been looking through the “physics learning materials” where I found some great pdf files/notes, but what would be great is if there...
  38. F

    Introductory literature, quantum mechanics

    I am taking this introductory course on quantum mechanics. I am not very satisfied with the "shallowness" of the literature intended for the course, and I would like to buy a better book. Does anybody have any recommendations? Thanks :)
  39. E

    An alternative introductory textbook for statistical mechanics

    An Introduction To Thermodynamics And Statistical Mechanics by Stowe is the course textbook for my Statistical Physics course I am having trouble with the book as it does NOT provide good examples and explanations nor does it have solutions just answers. I was wondering if there is Schaums or...
  40. G

    Good introductory textbook for L & H dynamics?

    I'm a high school grad, my knowledge of college level physics is quite rudimentary. I would like to start learning about L & H dynamics. What textbook would you guys recommend for novices?
  41. A

    Good introductory engineering textbooks?

    I'd like to find out the names of well known and comprehensive introductory texts(at the undergraduate level) in electrical engineering, mechanical (and) aerospace engineering. I'm looking at the something like what University Physics(Sears and Zemansky), Resnick and Halliday are in physics.
  42. A

    Good introductory engineering books

    I'd like to find out the names of well known and comprehensive introductory texts(at the undergraduate level) in electrical engineering, mechanical (and) aerospace engineering. I'm looking at the something like what University Physics(Sears and Zemansky), Resnick and Halliday are in physics.
  43. micromass

    Calculus Introductory Calculus For Infants by Inouye

    Author: Omi M. Inouye Title: Introductory Calculus For Infants Amazon Link: https://www.amazon.com/dp/0987823914/?tag=pfamazon01-20
  44. P

    Introductory Special Relativity Problem

    Homework Statement I was reading from Spacetime Physics (2nd Edition) by Taylor and Wheeler when I stumbled upon this problem I couldn't get right. Here's the gist of the part of the problem that I couldn't solve: Assume Earth is the rest frame of reference and that the planet Sirius is in...
  45. U

    Concise introductory physics texts

    I am looking for a title on introductory physics meeting criteria that are seldom met these days. Concise, ideally 500 pages or less Not cluttered with lots of extraneous boxes and such. (This ties into the first criterion.) Has at least partial solutions in the back Calculus-based but...
  46. T

    Engineering Introductory lvl circuit analysis problem

    Homework Statement Your factory is building RC low-pass filters using 10-6 F capacitors and 1k Ohm resistors. Suddenly the worldwide supply of capacitors dries up and you now have to build filters with the same electrical characteristics but you have to use inductors and resistors rather...
  47. R

    Deriving <v> from <x> - Introductory Quantum Mechanics

    (First post, hi everyone.) I'm reading Griffith's textbook on intro to quantum mech right now. After establishing the following equation $$\left\langle f(x) \right\rangle = \int f(x)p(x)\,dx$$ And thus $$\left\langle x \right\rangle = \int x|\Psi|^2\,dx$$ He goes on to find...
  48. B

    A good introductory book on real analysis with examples

    Hello I am wonderinf if you guys know about a good introductiry book on real analysis where they use examples. I have found some books online, but they seem to not show with examples what we can do. I have read to Spivak calculus book is a good introduction, but I think it was too basic. I...
  49. W

    Can anyone suggest an introductory book on knot theory?

    I want one good for physicists does not need to be very rigorous
  50. 1

    Some introductory Topology questions

    Hi all, My Topology textbook arrived in the mail today, so I started reading it. It begins with an introduction to an object called metric spaces. It says A metric on a set X is a function d: X x X -> R that satisfies the following conditions: -some conditions-- I am not...
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