What is Exercises: Definition and 167 Discussions

Exercise is any bodily activity that enhances or maintains physical fitness and overall health and wellness.It is performed for various reasons, to aid growth and improve strength, preventing aging, developing muscles and the cardiovascular system, honing athletic skills, weight loss or maintenance, improving health and also for enjoyment. Many individuals choose to exercise outdoors where they can congregate in groups, socialize, and enhance well-being.In terms of health benefits, the amount of recommended exercise depends upon the goal, the type of exercise, and the age of the person. Even doing a small amount of exercise is healthier than doing none.

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  1. Z

    Java A Guide to Programming in Java by Lawerenceville Press exercises?

    A Guide to Programming in Java by Lawerenceville Press exercises?? KK Nevermind.
  2. K

    Finding Fun and Motivating Cardio Exercises

    I am getting fat. Since I graduated college, I don't know what to do and I don't really know anyone to work out with. Here's the thing: I can't run or do elliptical machines. I just get so bored and I can never commit to it. I love racquetball, but I don't have anyone to play with. Can...
  3. M

    Some exercises on relativistic doppler shift?

    My physics teacher has informed us that for our mock waves exam we are going to be given some relativistic questions on doppler shift, as an experiment by our loving masters. We derived the Lorentz factor and some shift equations, but we haven't done anything else and I'd really like some...
  4. B

    Testing Foreign student needing some math exercises to know what the SAT looks like

    Can anyone help me out, I don't want study material, I just want some exercises that help me know what the SAT looks like
  5. rude man

    Feynman exercises bead parabola accelerometer

    In the subject accelerometer (see link) the answer given is a = kgx. I get a = 2kgx. I'm wondering if anyone cares to discuss this problem. The answerer used an energy argument that I'm not sure I followed, whereas I used a simpler force-balance method. F = force on bead by parabola and is...
  6. N

    Can Genius solve any of exercises of textbook

    I know my question is not clear.All I want to say if genius ones can solve any exercise of textbook without any problem I mean without having a problem at one of the sub exercise.
  7. J

    Cosmology/Fridmann equation exercises around the web?

    Hello, I'm looking for exercises and problems about the Friedmann equation. For example: calculate the redshift, H0, scale factor, temperature, horizons etc given the model of universe. Does anyone know some website, or professors homepages, in which i could find this stuff? Thank you :)...
  8. Z

    Best book on exercises of Special Relativity

    Hi, I'm learning special relativity with a book which doesn't include any exercises:cry:. Can anyone suggest me a book which includes - many - exercises (only) about SR (eventually with GR) ? Oh, and, with solutions ! Thank you.
  9. Femme_physics

    Electronic parallel voltage sources exercises?

    I'm trying to google for some but results often lead me to forum questions, theory articles, etc. Basically I'm looking for circuits questions with parallel voltage sources answers, where I am supposed to do the work to find out the solution for the current.
  10. U

    Particle physics - exercises

    Homework Statement Calculate the ratio of scattering cross sections for hadron and muon production \sigma(e^{+} e^{-} \rightarrow hadrons) / \sigma(e^{+} e^{-} \rightarrow \mu^{+}\mu{-}), just underneath and just a bit above the treshold for quark production t \bar{t} (Note only the exchange...
  11. Z

    Struggling with MTW Exercises: Any Hints for Exercise 3.18 and 5.1?

    hello there, I have started to tackle the giant book Gravitation by MTW on my own. I would like to see how you people who are having fun in reading this masterpiece faring in solving the exercises. I have read some books on tensor analysis and differential geometry and spacetime geometry as a...
  12. A

    MATLAB Exercises Help: Solve Series RC Circuit & Plot Circle

    Hello guys I'm totally new to MATLAB and i would like help solving the problems i have with my homework,I have these two excercises and don't even know where to begin 1st: When a dc voltage E volts is switched on a cross a series RC circuit at t=0(s),the variation of the capacitor voltage...
  13. F

    What Are Some Good Calculus Books with Solved Exercises?

    Hello, I haven't been able to find a good book. Could you please suggest some good books with solved exercises on Calculus (starting from limits, etc..)?
  14. I

    Torque of a man doing exercises against a wall?

    Homework Statement The person in figure 8.31 weighs 800 N. the forces F1 and F2 have magnitudes of 100 N and 900 N respective. Assume the force of gravity acts downward through point A as shown. Determine the net torque on the person about axes through points A, B, and C perpendicular to the...
  15. T

    Some calculus exercises doubts

    Homework Statement Problem 1 Find the equation of the tangent line on the following points of the curve. f(x) = \frac{1}{x - a}, a \in \mathbb{R} - \left \{ -2; 4 \} \right; x = -2, x = 4 Problem 2 Find the equation of the line normal to the tangent line on the following points of the curve...
  16. C

    How to find suitable exercises to practice on (in physics geometry) ?

    I am currently studying geometry and topology (with applications in physics) from the books T. Frankel "The Geometry of Physics" and M. Nakahara "Geometry, topology and physics" Both these books work pretty fast up to a sophisticated level, and I am lacking in practice. I can easily...
  17. E

    Grow taller: Stretching exercises

    http://www.betaller.com/whyitworks.htm Greetings, PF community. Certain product has come to my attetion, as it claims to be an exercise and health guide to grow up to 3 inches in an average period of 5 months (depending on the effort you put on it). The whole thing has to do with...
  18. P

    Where Can I Find Practice Exercises for Physics Outside of Traditional Courses?

    I have recently purchased the "Physics 1" set of 2 DVD's from Math Tutor DVD - (Jason Gibson). Unfortunately the dvd's do not include a section of practice exercises. Could somebody recommend either a website or book with suitable practice exercises? I guess I should also explain I am not...
  19. Z

    Are there any books with solved exercises for studying Lie Algebras on your own?

    I am studying Lie Algebras at home by my own, without access to any teacher. Being autodidact, it would much help me to have a book with solved exercises of Lie Algebras or Lie Groups. Does anyone know if is there any book that could help me solving problems, execises? Thank you, Luis
  20. L

    The Point of Physics Homework Exercises

    At my University, we get (in Experimental Physics) weekly homework which consists of three exercises with 3, 3 and 4 points (thus giving a total of 10 points for each sheet). Now I have received the sheet for the next week, on which the third task is "Oil Drop in an electric field". The first...
  21. J

    Seeking Exercises to Accompany Feynman's Lectures on Physics

    Hello, everyone I began reading Lectures on Physics from Feynman. But there is a problem: Those books haven't exercises. Can anyone tell me a (several) book(s) of exercises solved and proposed (with solutions) to accompany those Lectures step by step? Thank you very much for your help...
  22. B

    Exercises for The Feynman Lectures on Physics

    Hi, I just ordered the Exercises for The Feynman Lectures on Physics and although the exercises in them appear to be very interesting, most of them come without answer. I'm just wondering if there is someone with answers to all of them or if there is a book or website which has them. Thanks
  23. C

    Seeking Physics Vector Exercises - Need Help!

    Hello there. Monday I will have a test for physics about drawing force vectors on objects. The problem is there are not many exercises in the book I can practice with. So does anyone know a site or something where I can find exercises on how to draw the vectors? I am really sorry if this...
  24. F

    Solving Confusing Exercises: Understanding Water Displacement and Density

    Hi First of all I'd like to say that I don't want to put this under "Homework help", because its not really homework. But it is something I can't wrap my mind around. There are 2 tasks: 1) There's 200 cm3 water in a glass. How high does the water level rise / how much does the cubage...
  25. C

    General chemistry exercises online?

    I took a year-long regular chemistry class at my high school last year (should have done AP then...), and it was extremely slow-paced and boring. That pretty much crushed my enthusiasm for the subject until I started reading Linus Pauling's textbook...
  26. S

    Uniform rates exercises in practical applications

    Are the simple uniform rates problems practical for anything other than for applications like inlet and outlet pipes filling or draining a reservoir? The kind I mean are the ones which immediately yield rational equations immediately upon first analysis. We find motion problems, we find...
  27. G

    Proof By Contradiction Exercises

    Hi guys, I am looking to find some exercises, preferably online to practice Mathematical Proof by Contradiction. I have just finished my A-levels in the UK doing Maths and Further Maths and very little is done in the way of mathematical proof. The is only a single chapter on proof by...
  28. K

    Comp Sci Accelerated C++ book - no solutions for exercises, should I still solve them?

    As the title says, there are no answers for the book I'm learning C++ from, should I ignore the exercise section (well except the first exercise which is always compile and execute chapter examples) and move on or give them a try? I can get my hands on many exercises with solutions, but I'd like...
  29. F

    Need help with exercises. Equations etc.

    √x2 + 1 + √x2 – 2x + 3 = 3 │ x-4 │ - │ 2–0,5x│ ≤ 3 │5- x2-6 │= x2-5x-6 x2-2x+3 : x2-4x+3 > -2
  30. G

    Tensor Index Exercises: Find Extra Resources Here

    Dear all, I'm reading the GR book by Ray D'Inverno. I would like to do some additional exercises about tensors. I can get the Schaum Outline on tensors. Is there any other book or online resource where I can find additional exercises to get more familiar with tensor manipulations? Thanks...
  31. W

    Can Eye Exercises Improve Vision Without Glasses?

    Many people I know advice me that doing eye exercises will help improve my vision and if I do them for quite some time, that I will not need glasses any more. Is this true? When I google this, all I get are advertisements.
  32. M

    Math Exercises for Physics Students | Maiki

    Hey everybody, i am studying physics and i have just managed the first semester. I want to train my math skills a little bit now. Therefore i would like to have some exercises (with solutions) in math for the second and third semester. I would like to have some online stuff (but good books...
  33. L

    Where Can I Find Lattice-Theory Exercises for Beginners?

    Hi Can anyone recommend a book for me to go to for an introduction of lattice theory that has exercises? I am trying to get a good grasp of differences between lattices, boolean algebra, infimum, supremum, etc Would appreciate some help Cheers
  34. B

    Where Can I Find SUSY Exercises and Problems for Supersymmetry?

    Hello I need a lot of exercises and problems on SUSY (supersymmetry). Do you know any good (and complete!) website where to find them? My teacher in the phD only gives us theory. Thanks!
  35. S

    Learning Laplace & Fourier Integral Transforms: Examples & Exercises

    If there some one can help me to explain some examples and Exercises with there solution in Laplace integral transform and fourier integral transform , and If possible, make a Simple compare between them.
  36. H

    Exercises with solutions in theoretical physics

    Hello, do you know any websites on the internet with exersices and solutions in theoretical physics? No matter which Topic. Mathematical methods, Mechanics, Elektrodynamics, Quantum Mechanics,... thanks greetings
  37. M

    Missing solutions to exercises in Shankar's book?

    I just checked out the 1980 version of Shankar's "Principles of Quantum Mechanics" from the library and started reading it after reading many rave reviews on Amazon. In the prelude, on page xviii, he says "The answer to each exercise is given either with the exercise or at the end of the...
  38. J

    Should I Do Every Exercise in Apostol's Calculus Book?

    I am currently working through Apostol's Calculus book. Is it recommended that I work through each and every exercise in each section, or at least in the very important sections, so that I gain a more thorough understanding?
  39. P

    Mathematica Exercises on mathematical physics

    Hi everyone, I'm looking for textbooks that contain exercises on various aspects of mathematical physics (everything a theoretical physicist needs actually, i.e. from linear algebra and tensor analysis to differential geometry and topology etc.) at a graduate level. I am aware, of course...
  40. K

    Astronomy Exercises - Get Help Here!

    Hi everybody!I am a new member of this site and i am very happy! I would appreciate it if you could tell me any website in which i can find astronomy exercises.
  41. V

    Example exercises and answers for predicate logic inference (+ FOL in general)

    I'm battling with first order predicate logic (no identity, no extensions) and currently esp. inference using the so called "natural reasoning" rules for inference. Now, the textbook we use, is very ambiguously defined, even I have spotted several 'errors' in it, the lecturer even more. This...
  42. K

    Exercises and problems on QED and QFT ?

    I'm trying to study QFT using P&S book. Now I'm on the chapter 13 but I feel that I'm rather bad at solving practical problems on QFT and QED. Could anyone suggest a good source of problems (preferably with solutions) on QFT and QED (near the level of P&S ch. 1-13) to practise ? Thanks in advance !
  43. M

    Where Can I Find Solved Electrical Engineering Exercises and Problems Online?

    Hello, are there any websites of solved exercises and problems in electrical engineering,especially ohm's law,kirchoff's laws and nodal analysis? Thanks
  44. C

    Choosing a QFT Book: Easy to Understand & Good Exercises

    i am having a big issue in deciding whether to read zee's qft in a nutshell book. peskin and schroeder's intro to qft, or ryder's qft book. I have heard the first chapter of zee's qft book is great but the other chapters get progressively worse because they are a general outline of the...
  45. M

    Can i find more exercises and explanation online?

    Basically I'm in a chapter about double and triple integration, integration using polar cordinates, etc... I'm not a big fan of my book and it's not very clear to me , so maybe anyone knows where i can find online good explanation of the subject and maybe more exercises. thank you
  46. C

    How to Prove Semisimplicity in Classical Linear Lie-Algebras?

    [SOLVED] Exercises on Lie-algebras I'm doing some homework on Lie-algebra's, and there are several things I am missing. Let me list them below in one thread. The statement is "If L is a classical linear Lie-algebra, then L is semisimple." I have reduced this to proving Rad L \subseteq Z(L)...
  47. S

    More conic section exercises

    I have already tried some internet searches and looked through and solved the more interesting exercises in two of my Larson & Hostetler college algebra/precalculus books, and some in an intermediate algebra book - but I wish I could find many more useful, practical and applied exercises for...
  48. Y

    Solving Mathematical Method In Physics Exercises

    Hello! My English is poor because I'm from Poland. I have 3 exercises from subject called: Mathematical Method In Physics. Would you be so kind and help me to solve this: 1. (a) Prove that: {1 \over r}(rV)''=V''+(2/r)V' (that was easy, but next point (b) is not) (b) Use equation from...
  49. H

    Find Online Exercises for Your Stuff | Anybody Knows?

    Anybody knows where I can find some online exercises about this stuff? Thx
  50. R

    Cos/Sin Rule Exercises: Challenges and Solutions

    Hey guys, We've been learning cos/sin rule since the 1st of school, and i really had difficulties with the following exercises, I've been working them yesterday for 2-3 hours and could only manage to do part of it... 1. IN Quadrilateral ABCD, AB=7 cm, BC= 8cm, CD=5cm and angle ABC=52...
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