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Physics Forums - The Fusion of Science and Community

  1. Science Education

    1. Homework and Coursework Questions

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      Homework and Coursework Questions

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      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: Stacked Blocks, Friction, and Velocity rezal, Mar 2, 2015 at 1:17 AM

    2. Science and Math Textbooks

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      Latest: Cosmology books for high school students jedishrfu, Mar 1, 2015 at 8:42 PM

    3. Academic Guidance

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      Latest: What electives would be most beneficial? CrystalCaribean, Mar 1, 2015 at 10:39 PM

    4. Career Guidance

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      Latest: Concerned about ability to succeed in job/grad school jedishrfu, Mar 2, 2015 at 12:32 AM

    5. Educators and Teaching

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      Latest: New to AP teaching - AP Physics 1 test help Redbelly98, Mar 1, 2015 at 12:00 PM

    6. STEM Learning Materials

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      Latest: Material that'll help improve write-ups for lab experiments? Vagn, Mar 1, 2015 at 3:36 PM

  2. Physics

    1. General Physics

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      Latest: Thermal radiation intensity Hypatio, Mar 2, 2015 at 1:09 AM

    2. Classical Physics

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      Latest: Mythbusters: Blow your own sail A.T., Mar 2, 2015 at 1:17 AM

    3. Quantum Physics

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      Latest: Question on validity of Heisenberg's Uncertainty principle bhobba, Mar 2, 2015 at 12:57 AM

    4. Special and General Relativity

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      Latest: Time DIlation and Observation bcrowell, Mar 1, 2015 at 11:36 PM

    5. Atomic, Solid State, Comp. Physics

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      Latest: Differences between Boltzmann and Fermi-Dirac distributions Urmi Roy, Mar 1, 2015 at 10:49 PM

    6. High Energy, Nuclear, Particle Physics

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      Latest: differential cross-section for partonic collisions Orodruin, Mar 2, 2015 at 1:26 AM

    7. Beyond the Standard Model

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      Latest: Hubble Constant and Entropy Jimster41, Mar 1, 2015 at 8:03 PM

  3. Astronomy and Cosmology

    1. Astronomy and Astrophysics

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      Latest: Horizontal Branch Star Drakkith, Mar 2, 2015 at 12:03 AM

    2. Cosmology

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      Latest: Acceleration a Function of Density, yet Density is Constant? PeterDonis, Mar 1, 2015 at 9:25 PM

    3. Stargazing and Telescopes

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      Latest: Planning to buy a first telescope? jim hardy, Feb 27, 2015 at 12:44 PM

  4. Mathematics

    1. General Math

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      Latest: Exponentiation of mods Sam Anderson, Mar 2, 2015 at 1:29 AM

    2. Calculus

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      Latest: integration help travis_salyer, Mar 2, 2015 at 1:19 AM

    3. Differential Equations

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      Latest: Understanding coupled Runga Kutta derivation ognik, Mar 1, 2015 at 4:59 PM

    4. Topology and Analysis

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      Latest: Clarification about Poincaré's conjecture lavinia, Mar 1, 2015 at 5:00 PM

    5. Linear and Abstract Algebra

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      Latest: QR Decomposition w/ Householder and Givens Transformations Th3HoopMan, Mar 2, 2015 at 12:29 AM

    6. Differential Geometry

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      Latest: Attempting to understand diffeomorphisms "Don't panic!", Mar 1, 2015 at 11:31 AM

    7. Set Theory, Logic, Probability, Statistics

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      Latest: Drawing three cards - combined probability Lenus, Mar 1, 2015 at 11:30 PM

    8. Math Software and LaTeX

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      Latest: matlab intro DrClaude, Mar 1, 2015 at 1:44 PM

  5. Engineering

    1. General Engineering

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      Latest: Hotel Load of train: Why separate generator & not locomotive rollingstein, Mar 1, 2015 at 11:37 PM

    2. Engineering Systems and Design

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      Latest: "Members of a frame are axially inextensible" implication? Chestermiller, Mar 1, 2015 at 12:13 PM

    3. Mechanical Engineering

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      Mechanical Engineering

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      1. Aerospace Engineering

      2. Automotive Engineering

      Latest: Convective heat transfer coefficient in channel leonita, Mar 2, 2015 at 12:38 AM

    4. Electrical Engineering

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      Latest: What is the polarity of a Pn junction diode NascentOxygen, Mar 2, 2015 at 12:19 AM

    5. Materials and Chemical Engineering

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      Latest: Understanding of crystal wave vector Urmi Roy, Mar 1, 2015 at 11:09 PM

    6. Nuclear Engineering

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      Latest: An idea for a Pu-238 replacement for NASA space missions Astronuc, Mar 1, 2015 at 11:02 PM

  6. Other Sciences

    1. Chemistry

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      Latest: Molasses vs. Rust kokolyia, Mar 2, 2015 at 12:25 AM

    2. Biology

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      Latest: Neanderthal fossils... never frozen? Evo, Mar 1, 2015 at 10:34 PM

    3. Medical Sciences

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      Latest: Can pull up exercise increase height? jobyts, Feb 28, 2015 at 11:37 PM

    4. Programming and Computer Science

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      Latest: Rounding up Random Numbers Mark44, Mar 1, 2015 at 9:32 PM

    5. Earth

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      Latest: Impact: Earth! A meteor/comet impact simulator OmCheeto, Mar 2, 2015 at 12:44 AM

    6. Computing and Technology

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      Computing and Technology

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      1. Calculators

      Latest: Is 4GB of VRAM overkill for 1080p gaming? B. Elliott, Mar 1, 2015 at 9:32 PM

  7. PF Lounge

    1. General Discussion

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      General Discussion

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      1. Current Events

      2. History and Humanities

      3. Photography

      4. Fun, Photos and Games

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      Latest: Portugal and the war on drugs jedishrfu, Mar 2, 2015 at 12:43 AM

    2. Science Fiction and Fantasy

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      Science Fiction and Fantasy

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      1. Science Fiction Writing

      Latest: And... who is your Swords+Sorcery or Fantasy character? Pythagorean, Mar 1, 2015 at 11:18 PM

    3. Feedback and Announcements

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      Feedback and Announcements

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      1. PF Member Awards 2014

      Latest: Walking on eggshells narrator, Mar 1, 2015 at 10:53 PM

    4. New Member Introductions

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      Latest: Hello ALL! Using Molasses to De-Rust the Masses! kokolyia, Mar 2, 2015 at 1:06 AM