Login or Sign up!

Physics Forums - The Fusion of Science and Community

  1. Science Education

    1. Homework and Coursework Questions

      Discussions:
      238,717
      Messages:
      1,274,904

      Homework and Coursework Questions

      Sub-Forums

      1. Introductory Physics Homework

      2. Advanced Physics Homework

      3. Precalculus Mathematics Homework

      4. Calculus and Beyond Homework

      5. Biology, Chemistry and Earth Homework

      6. Engineering and Computer Science Homework

      Latest: Find the Wronskian? Math10, Feb 26, 2015 at 5:09 PM

    2. Science and Math Textbooks

      Discussions:
      4,129
      Messages:
      23,607
      Latest: Lagrangian and Hamiltonian mechanics snatchingthepi, Feb 26, 2015 at 4:28 PM

    3. Academic Guidance

      Discussions:
      21,245
      Messages:
      174,720
      Latest: How do people obtain the math for theoretical physics? homeomorphic, Feb 26, 2015 at 5:10 PM

    4. Career Guidance

      Discussions:
      4,991
      Messages:
      39,837
      Latest: Is a bachelor in Physics a good idea for Engineering? lh9713, Feb 26, 2015 at 4:13 PM

    5. Educators and Teaching

      Discussions:
      300
      Messages:
      3,726
      Latest: Why are students permitted to use calculators on AP math? Bystander, Feb 26, 2015 at 4:16 PM

    6. STEM Learning Materials

      Discussions:
      617
      Messages:
      3,717
      Latest: Problem Book in Relativity and Gravitation, online, free bcrowell, Feb 25, 2015 at 4:30 PM

  2. Physics

    1. General Physics

      Discussions:
      36,714
      Messages:
      294,228
      Latest: Isolation transformers zoki85, Feb 26, 2015 at 5:05 PM

    2. Classical Physics

      Discussions:
      20,716
      Messages:
      148,411
      Latest: Mythbusters: Blow your own sail Andrew Mason, Feb 26, 2015 at 5:08 PM

    3. Quantum Physics

      Discussions:
      17,746
      Messages:
      176,145
      Latest: Is the moon a boson? Khashishi, Feb 26, 2015 at 4:47 PM

    4. Special and General Relativity

      Discussions:
      14,635
      Messages:
      214,031
      Latest: Both frames of reference predict the other is slower -- proof Unified28, Feb 26, 2015 at 5:08 PM

    5. Atomic, Solid State, Comp. Physics

      Discussions:
      4,972
      Messages:
      23,945
      Latest: Reciprocal lattice vector M Quack, Feb 26, 2015 at 10:40 AM

    6. High Energy, Nuclear, Particle Physics

      Discussions:
      5,811
      Messages:
      41,439
      Latest: Experimental Black Hole Physics wabbit, Feb 26, 2015 at 3:20 PM

    7. Beyond the Standard Model

      Discussions:
      4,657
      Messages:
      57,413
      Latest: Twice of supersymmetric transformation = translation Roy_1981, Feb 25, 2015 at 6:42 AM

  3. Astronomy and Cosmology

    1. Astronomy and Astrophysics

      Discussions:
      9,748
      Messages:
      86,921
      Latest: Globular cluster ejected from M87 liometopum, Feb 26, 2015 at 2:19 PM

    2. Cosmology

      Discussions:
      4,866
      Messages:
      62,856
      Latest: Distribution of energy after matter/antimatter annihilation Chalnoth, Feb 26, 2015 at 5:07 PM

    3. Stargazing and Telescopes

      Discussions:
      423
      Messages:
      4,302
      Latest: Fake magnification and other information wabbit, Feb 26, 2015 at 4:32 PM

  4. Mathematics

    1. General Math

      Discussions:
      15,542
      Messages:
      111,804
      Latest: Find the pattern: 12, 44, 130, 342, 840 ... zoki85, Feb 26, 2015 at 1:05 PM

    2. Calculus

      Discussions:
      12,883
      Messages:
      74,164
      Latest: Calculus Michael Spivak 3th ed. Pag 46: Function as a rule wabbit, Feb 26, 2015 at 2:11 PM

    3. Differential Equations

      Discussions:
      4,652
      Messages:
      20,955
      Latest: system of diff eqs modeling tanks of brine nate9519, Feb 26, 2015 at 4:00 PM

    4. Topology and Analysis

      Discussions:
      1,028
      Messages:
      6,479
      Latest: A sequence of functions evaluated at a sequence AxiomOfChoice, Feb 25, 2015 at 7:53 AM

    5. Linear and Abstract Algebra

      Discussions:
      8,585
      Messages:
      53,132
      Latest: Applications of group theory homeomorphic, Feb 26, 2015 at 10:56 AM

    6. Differential Geometry

      Discussions:
      3,448
      Messages:
      21,114
      Latest: Question about geometric algebra -- Can any one help? jedishrfu, Feb 26, 2015 at 10:13 AM

    7. Set Theory, Logic, Probability, Statistics

      Discussions:
      6,910
      Messages:
      38,772
      Latest: Evaluate 2 logistic functions for the best x to minimize OR. Adel Makram, Feb 26, 2015 at 7:50 AM

    8. Math Software and LaTeX

      Discussions:
      4,649
      Messages:
      19,456
      Latest: Simplify Matlab for/if statements further DrClaude, Feb 26, 2015 at 3:21 AM

  5. Engineering

    1. General Engineering

      Discussions:
      5,139
      Messages:
      35,484
      Latest: List of Metals or Alloys With Fatigue Limits? thankz, Feb 26, 2015 at 12:30 PM

    2. Engineering Systems and Design

      Discussions:
      1,882
      Messages:
      11,681
      Latest: Energy from bike riding used to charge phones/laptops phyzguy, Feb 25, 2015 at 11:21 AM

    3. Mechanical Engineering

      Discussions:
      10,385
      Messages:
      65,480

      Mechanical Engineering

      Sub-Forums

      1. Aerospace Engineering

      2. Automotive Engineering

      Latest: Determine the Rate of Change of Pressure Across a Valve Purple_Dan, Feb 26, 2015 at 3:30 PM

    4. Electrical Engineering

      Discussions:
      15,898
      Messages:
      110,824
      Latest: "Black sun" effect in CMOS sensors T.Leedy, Feb 26, 2015 at 4:37 PM

    5. Materials and Chemical Engineering

      Discussions:
      2,565
      Messages:
      10,202
      Latest: Efficient aluminum foil heat transfer design Butters, Feb 26, 2015 at 2:06 PM

    6. Nuclear Engineering

      Discussions:
      1,542
      Messages:
      34,361
      Latest: The Nuclear Power Thread Jon Richfield, Feb 26, 2015 at 12:44 PM

  6. Other Sciences

    1. Chemistry

      Discussions:
      7,095
      Messages:
      37,348
      Latest: Corrosion in metal pipe carrying DC current? amrmohammed, Feb 26, 2015 at 3:40 PM

    2. Biology

      Discussions:
      5,742
      Messages:
      46,794
      Latest: Reduction in the time range of a species HallsofIvy, Feb 26, 2015 at 2:43 PM

    3. Medical Sciences

      Discussions:
      2,170
      Messages:
      22,190
      Latest: ...incarceration or institutionalization can delay emotional growth WWGD, Feb 24, 2015 at 10:00 PM

    4. Programming and Computer Science

      Discussions:
      4,596
      Messages:
      28,476
      Latest: BPSK Fiber Optic Communication technique module. thankz, Feb 26, 2015 at 12:02 PM

    5. Earth

      Discussions:
      1,740
      Messages:
      20,342
      Latest: Hell hasn't frozen over, but Lake Erie has (almost) Borg, Feb 26, 2015 at 8:43 AM

    6. Computing and Technology

      Discussions:
      5,982
      Messages:
      43,400

      Computing and Technology

      Sub-Forums

      1. Calculators

      Latest: How to find the Wronskian on Ti-89? jedishrfu, Feb 26, 2015 at 9:48 AM

  7. PF Lounge

    1. General Discussion

      Discussions:
      38,519
      Messages:
      980,213

      General Discussion

      Sub-Forums

      1. Current Events

      2. History and Humanities

      3. Photography

      4. Fun, Photos and Games

      5. Relationships

      6. Social Sciences

      Latest: What is your reason for studying physics? jedishrfu, Feb 26, 2015 at 5:08 PM

    2. Science Fiction and Fantasy

      Discussions:
      618
      Messages:
      10,792

      Science Fiction and Fantasy

      Sub-Forums

      1. Science Fiction Writing

      Latest: Consequences of denser atmosphere on Earth-like planet Bystander, Feb 26, 2015 at 4:07 PM

    3. Feedback and Announcements

      Discussions:
      3,720
      Messages:
      42,814

      Feedback and Announcements

      Sub-Forums

      1. PF Member Awards 2014

      Latest: Finding posts I "liked" Greg Bernhardt, Feb 25, 2015 at 8:22 PM

    4. New Member Introductions

      Discussions:
      1,235
      Messages:
      4,052
      Latest: Hi there Greg Bernhardt, Feb 26, 2015 at 2:52 PM