What is General physics: Definition and 158 Discussions

The Journal of Physics A: Mathematical and Theoretical is a peer-reviewed scientific journal published by IOP Publishing. It is part of the Journal of Physics series and covers theoretical physics focusing on sophisticated mathematical and computational techniques. It was established in 1968 from the division of the earlier title, Proceedings of the Physical Society.
The journal is divided into six sections covering: statistical physics; chaotic and complex systems; mathematical physics; quantum mechanics and quantum information theory; classical and quantum field theory; fluid and plasma theory.
The editor in chief is Martin R Evans (University of Edinburgh).

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  1. F

    General physics electrostatics problem

    Homework Statement Charge 0 x 10-9 C is placed on a conducting spherical shell that has an inner radius of 4.8 cm and an outer radius of 6.2 cm. A point charge (-1.9) x 10-9 C is placed inside the shell, at the center. What is the magnitude of the electric field of this configuration, at a...
  2. L

    General Physics Help - Questions on E=mc^2 & Train Mass at Light Speed

    Ello all, new to the forums here. I just did a quick google search and wound up here. Figured i could get some answers to some of me questions i have about physics. A lil history real fast bout me. I was working on a network engineering degree, but after hating the IT field so much and not...
  3. C

    Get Help with Physics: Tips for Studying & Problem-Solving

    Hello everyone, My questions are 1) How should one study Physics? I do really well in math, but pretty bad in physics. When studying for physics, I can't live without the solutions manual( and i Hate it) 2) What is practical intuition? 3) When solving problems in physics, how...
  4. J

    Online courses for general physics

    Im looking forward to do courses online on general physics, anyone knows any institutions where i can do this course if you know about the cost also please let me know i have to get permission from my parents.
  5. J

    How general physics differ from engineering physics

    I want to know how general physics differ from engineering physics my younger sister want to take engineering physics as her career, i said both are same, but she said different i have challenged her that i will tell the difference by tommorrow can anyone tell me the exact difference of general...
  6. M

    How much should I remember from general physics?

    I took the usual general physics classes about 4 years ago during my chemistry undergrad career. Now, I'm taking some more physics classes in order to go to grad school for physics. I'm going to be taking intermediate E&M and Mechanics. Will I have a hard time in these classes if I don't...
  7. C

    Can I bypass General Physics I-III for theoretical classes?

    Currently I am back in school taking some math courses to finish an undergraduate degree while getting credit for a master's program in math. I am fairly competent in calculus and did well in the first half of an introductory physics class that I had to withdraw from for other reasons. My long...
  8. E

    Choose the Right Physics Major for You

    I am currently in High school looking for colleges to apply for. I want to have a physics major, but the one school I am applying for right now as 3 choices for physics. I am just wondering which one to choose. Physics, Applied Physics: General Physics Physics: Secondary Teacher Education Any...
  9. S

    Help with 3 questions for general physics?

    1.Three point charges are fixed in place in the right triangle diagrammed below, in which q1 = 0.81 µC and q2 = -0.53 µC. What is the electric force on the +1.0 µC charge due to the other two charges,degree measured counterclockwise from the +x-axis? 2. Two Styrofoam balls with the same mass...
  10. M

    General physics problem involving velocity, acceleration, braking of a car

    1. You are driving toward a traffic signal when it turns yellow. Your speed is the legal speed limit of v0=55 km/h.: your best deceleration rate has the magnitude a = 5.18 m/s^2. Your best reaction time to begin braking is T = .75S. To avoid having the front of your car enter the...
  11. N

    Is it reasonable to go straight from general physics to classical mechanics?

    I'm a biochemistry major with most of my requirements out of the way. Fall term my schedule will be: Physical chemistry, intro to real analysis (junior level). This is 8 credits, but to maintain full financial aid I need 12 credits. I recently found out that I am 12 credits away from a physics...
  12. J

    Magnetism problem for General Physics 2

    Magnetism problem for General Physics 2! Homework Statement Suppose the rod in the figure has mass m= 0.40kg and length 20cm and the current through it is I= 40A . (Intro 1 figure) If the coefficient of static friction is us= 0.55, determine the minimum magnetic field (not...
  13. E

    Calculating Black Hole Mass Using Reduced Mass and De Broglie's Wavelength

    Homework Statement You are aboard Spaceship headed toward a planet. The planet utilizes a nearby compact gamma ray emitting black hole as a power and transportation source. You have been approaching Congress for a couple of weeks and obtained the below data. 1. Using the below data...
  14. A

    Irodov's Problems in General Physics

    Homework Statement A motorboat is going downstream overcame a raft at a Point A; t=60 min later it turned back and after some time passed the raft at a distance l=6km from point A. Find the flow velocity assuming the duty of the engine to be constant. Homework Equations Average Velocity...
  15. R

    Calculate Cost of Gold on Commemorative Quarter-Dollar

    [b]1. Consider a commemorative quarter-dollar advertised for sale at $4.98. It has a diameter of 24.8 mm, a thickness of 1.78 mm, and is completely covered with a layer of pure gold 0.215 µm thick. The volume of the plating is equal to the thickness of the layer times the area to which it is...
  16. A

    Courses Why do we learn about circuits in a general physics course?

    it's a question I've been wondering for a little while: why do we learn about resistors and capacitors, etc in a general physics course? all the other coursework is about things that happen naturally in nature: mechanics, gravity, lenses, magnetism; but then we devote several chapters to...
  17. V

    Best Book for General Physics: A Comprehensive Guide for Engineering Graduates

    i am an engineering graduate. i have a special interest in physics. After my school, i never touched physics. could anyone suggest me a book best for physics,please? It should cover all the general physics concepts in detail and easily understandable. It should act as a ALL IN ONE for me...
  18. C

    How Does a Pogo Stick Utilize Spring Mechanics for Maximum Jump Height?

    General Physics Homework Question! Please help! A child's pogo stick stores energy in a spring (k= 21000 N/m). At position A (x1=-0.100 m). The spring compression is a maximum and the child is momentarily at rest. At position B (x=0), the spring is relaxed and the child is moving upward. At...
  19. A

    Can something have negative acceleration and still move faster?

    Can something be going at negative acceleration be going faster or moving, not stopping or becoming slower?
  20. D

    General Physics Problem (Velocitys)

    . Homework Statement A hare and a tortoise compete in a race over a course of 1.00km long. The tortoise crawls straight and steadily at its max speed of 0.200 m/s toward the finish line. the hare runs at its max speed of 8.00 m/s toward the goal for .800km and then stops to taunt the tortoise...
  21. H

    What is the largest angle for sin and tan to agree within 2 significant figures?

    For small angles theta, the numerical value of sin theta is approximately the same as the numerical value of tan theta.Find the largest angle for which sine and tangent agree to within two significant figures.
  22. H

    What is the Diameter of an Oil Slick Spreading on a Lake?

    One liter ( 1000 cm^3) of oil is spilled onto a smooth lake.If the oil spreads out uniformly until it makes an oil slick just one molecule thick, with adjacent molecules just touching, estimate the diameter of the oil slick. Assume the oil molecules have a diameter of 2X10^-10m.
  23. J

    How Does Photon Momentum Exist Without Mass?

    1. Classical momentum is derived using this formula: p=mv. The mass of a photon is zero, so then, how can it have momentum? Does it have some other kind of momentum that differs from classical momentum? 2. Photons are particles, why then do they travel in a wave? I've heard it's because...
  24. C

    Need Help with General Physics II Homework? Get Expert Assistance Today!

    Homework Statement See attached Homework Equations N/A The Attempt at a Solution I tried to do some of this, but I'm not even sure where to start. I'm so confused. I don't have the textbook yet neither as it hasn't come in the mail, so I can't reference it. My professor has a very...
  25. V

    Question from Problems in General Physics (Irodov)

    Hi Following is a question from "Problems in General Physics - Irodov". I think I should be able to solve this problem but I don't get a part of the question. Wondering if somebody can clarify what does " velocity which is n=2 times less than the river flow velocity" means is mathematical...
  26. G

    General Physics (mobile phones)

    Hi Here Is Gagan.can Anybody Answer My Question Given Below: 1.) Why When We Dial A Mobile No. It Accsess To A Particular Mobile Inspite Of The Fact That Radiations Reaching To All Mobiles Are Same. In Short What Is That Thing That Actually Differentiate Various No.
  27. N

    General Physics I & II w/Calculus

    Well I finished General Physics I & II w/Calculus this year with good grades (A/A-), but I really don't feel I retained everything. I got most of the concepts down from Newtonian Mechanics, but I don't feel as though I grasped everything in E&M. I took Physics II while taking Calculus II, so I...
  28. N

    Can You Solve These General Physics Problems?

    Just interested in seeing what peoples answers are to these questions. I am new to the site so this could be considered a test of how well the members of this forums acutally know physics.{I've done this problems and have answers} Interested in seeing which equations you used also. Problem...
  29. C

    How Is Tension Distributed in a Scaffold Supported by Wires with Uneven Loads?

    A 200-N scaffold is held up by a wire at each end. The scaffold is 18m long. A 650-N box sits 3.0m from the left end. What is the temsion in each wire? I have worked this problem several times but none of my answers are close to the choices I have on my paper. I tried it like this FT=...
  30. N

    Working on a general physics engine

    I'm working on a general physics engine for fun. Objects have two velocity vectors: rotation and translation. When a collision is detected, objects are told the point of collision (p) and the object that they hit. The object decomposes its translational velocity into the component pointing...
  31. L

    How Do You Set Up a Physics Problem Involving Projectile Motion?

    The ball takes off at 30deg and lads 40 ft from there. [Don't solve/calculate the problem, just set up axes, and make a list of what you know or don't: delta-x, delta-y, horizontal velocity, initial vertical velocity, v sub-y, a sub-y, and t.] is this correct?: delta-x = 40 ft delta-y = 0...
  32. S

    General physics question (position,velocity and acceleration)

    Hey I'm quite new to physics and am still getting my head around some equations and the correct ways to use them... This question is just throwing me off because of the angle given and I don't know any formula's that include an angle. Question is.. Steve and Mark are playing a game of...
  33. S

    REU Programs and General Physics Questions from a Freshman

    Hey guys, I just have a couple of questions. I am currently a freshman at a small state school. First off, I was wondering what level of mathematics and physics is sufficient to do an REU summer program. I've emailed a few programs, and they have constantly stated that there are no specific...
  34. M

    Does Problems in General Physics by irodov come with solutions?

    Does "Problems in General Physics" by irodov come with solutions? Sorry i had to make another thread instead of stick with the first irodov thread on this page, but i need to know if the book provides solutions (or atleast answers) to the problems as soon as possible. This is mostly because...
  35. S

    What is the Meaning of General Physics?

    what is "GENERAL" physics what is the meaning of general physics. Physics is physics. there is no general. if you observe the nature what you obtain is only the average not the general. so why do you call this as general. i am totaly confused. for example solid state physics means physics of...
  36. R

    Textbook Recommendation for General Physics

    I seek a recommendation for a comprehensive calculus-based general physics textbook, one that would include an introduction to relativity and quantum theory and whatever else comprises modern physics. I would prefer a calculus-based textbook where the derivation of the algebraic formulae used...
  37. R

    Solving Momentum and Velocity Questions for an Air Track Glider

    The net force acting on a glider on an air track (an essentially frictionless system) varies with time as shown in the following diagram. The vertical scale is such that the space between consecutive vertical gridlines is 4.0 Newton(s). The glider has a mass of 0.800 kg. When the force is...
  38. E

    General physics contest problems

    Homework Statement A proton sits at coordinates (x; y) = (0; 0), and an electron at (d; h), where d >> h. At time t = 0, a uniform electric field E of unknown magnitude but pointing in the positive y direction is turned on. Assuming that d is large enough that the proton-electron...
  39. I

    General Physics Question - Rod moving about a pivot

    Homework Statement This problem involves a uniform rod of length L with a pivot at point L/4 (so that 1/4 of the rod is behind the pivot and 3/4 is in front of it). The rod is released from a horizontal position and drops down. You need to use conservation of energy to solve for the velocity...
  40. Andrew Mason

    News What a jerk (cont'd from General Physics)

    [mentor's note: the following posts were split off a thread in General Physics: https://www.physicsforums.com/showthread.php?t=155149 ] The only one that comes to mind is the GWB force. It was thought to be of relatively short duration but has demonstrated a much longer lasting effect. The...
  41. P

    Testing Physics Lab Exams: Theoretical or Experimental?

    Hello all, Do you have exams for physics labs? How is the exam done? Theoretical or experimental? Thank you
  42. S

    Solve for Force Exerted by Spring on Ball | General Physics Problem Help

    Im having difficulty with a physics problem and was looking for help. The problem states: A spring has a relaxed length of 1.0m, when no force is acting to stretch or compress it. It has a spring constant k = 200N/m. A ball of mass .05kg is attached to one end and it is made to go in circle...
  43. K

    Help with problems General physics

    help with problems!General physics :confused: I really need help with my physics test. Its a home test! Can anyone please help me.:smile: Problem 1: A Ferris wheel has radius 5.o m and makes one revolution in 8 seconds. A person weighing 670 N is sitting on one of the benches...
  44. D

    The Blasted Elevator Questions; General Physics- Please help

    hey everyone, sheesh, our professor has us do our homework online, and I SWEAR my answer is right, but apparently it isnt. Here is the question: You leave the doctors office after your annual checkup and recall that you weighed 684N. You then step onto an elevator with a scale. Find the...
  45. J

    How Should the Second Crewman Pull to Align the Boat's Net Force Forward?

    Hello, I was wondering if someone could help me with a homework problem for non-calculus based physics: Two crewmen pull a boat through a lock. One crewman pulls with a force of F1 = 150 N at an angle of 32 degrees relative to the forward direction of the boat. THe second crewman, on the...
  46. D

    I.E Irodov's Problems in General Physics

    I.E Irodov's "Problems in General Physics" What level is this book supposed to be? Should a good 11th Grader be able to solve most of them? I am getting kinda discouraged because some of these problems take me more than an hour to solve.. and I can't even understand some of them.
  47. S

    Irodov Problems in General Physics

    Hey I purchased this book and was wondering how hard do you think this book is?
  48. J

    An Elementary question for general physics

    I know this probably should be in the K-12, but I'm in college and I am enrolled in a general physics course. Okay, my question is if a rock drops off a sea cliff (note: NOT THROWN), and the sound of it when it hits the ocean water is heard 3.4 s later. And the speed of sound is 340 m/s. How...
  49. C

    Explore General Physics Resources: A Comprehensive List

    Are there any nice general physics sites besides this?
  50. M

    Revising for SPM General Physics: Recommended Books & Sites

    I am revisind General Physics for my SPM. Can anyone suggest good books or sites for background reading?
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