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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

      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: Does the equation N = No e¯kt represent Radiation Strength? matteo137, Mar 4, 2015 at 12:53 AM

    2. Science and Math Textbooks

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      Latest: Can't remember where I read this! (when using the proper-time parametrization) jedishrfu, Mar 3, 2015 at 11:41 PM

    3. Academic Guidance

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      Latest: 2015 Summer Internships Thread Bishop556, Mar 4, 2015 at 12:18 AM

    4. Career Guidance

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      Latest: Do you have to be a genius to do nuclear/particle physics? Arsenic&Lace, Mar 3, 2015 at 10:11 PM

    5. Educators and Teaching

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      Latest: Looking for feedback on physics animations Matt Whibley, Mar 3, 2015 at 6:46 AM

    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: Electric charge flow in AC and DC Drakkith, Mar 4, 2015 at 1:01 AM

    2. Classical Physics

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      Latest: Collision sound Drakkith, Mar 4, 2015 at 12:17 AM

    3. Quantum Physics

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      Latest: First photograph of light as both a particle and wave TrickyDicky, Mar 4, 2015 at 12:48 AM

    4. Special and General Relativity

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      Latest: Speed of light postulate and clock synchronization DaleSpam, Mar 3, 2015 at 10:31 PM

    5. Atomic, Solid State, Comp. Physics

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      Latest: Gibbs Free Energy in Superconductors taishizhiqiu, Mar 3, 2015 at 8:35 PM

    6. High Energy, Nuclear, Particle Physics

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      Latest: What functions of fields describe particles? matteo137, Mar 3, 2015 at 2:36 PM

    7. Beyond the Standard Model

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      Latest: Quick question about LQG Self-Dual Black Holes marcus, Mar 3, 2015 at 7:33 PM

  3. Astronomy and Cosmology

    1. Astronomy and Astrophysics

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      Latest: Rapid Expansion of the Universe Orodruin, Mar 4, 2015 at 12:13 AM

    2. Cosmology

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      Latest: Acceleration a Function of Density, yet Density is Constant? HeavyMetal, Mar 4, 2015 at 1:04 AM

    3. Stargazing and Telescopes

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      Latest: Here are some astrophotos I've taken lately davenn, Mar 3, 2015 at 9:25 PM

  4. Mathematics

    1. General Math

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      Latest: Probability Question - Getting x heads from n coin tosses Mentallic, Mar 3, 2015 at 9:34 PM

    2. Calculus

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      Latest: Newton Leibnitz Formula for Evaluating Definite Integrals AURUM, Mar 4, 2015 at 12:31 AM

    3. Differential Equations

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      Latest: Understanding coupled Runga Kutta derivation ognik, Mar 2, 2015 at 9:35 PM

    4. Topology and Analysis

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      Latest: Clarification about Poincaré's conjecture lavinia, Mar 3, 2015 at 1:45 PM

    5. Linear and Abstract Algebra

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      Latest: Cholesky pairs Greg Bernhardt, Mar 3, 2015 at 6:00 PM

    6. Differential Geometry

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      Latest: Koszul connexion lavinia, Mar 3, 2015 at 1:57 PM

    7. Set Theory, Logic, Probability, Statistics

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      Latest: Test for Normality of Residuals -- Is this how it Works? WWGD, Mar 3, 2015 at 8:46 PM

    8. Math Software and LaTeX

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      Latest: Looking for calculus program to find volume billy_joule, Mar 3, 2015 at 4:36 PM

  5. Engineering

    1. General Engineering

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      Latest: Horsepower needed to lift 600 lb load, w/8 motors julianwitkowski, Mar 3, 2015 at 9:42 PM

    2. Engineering Systems and Design

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      Latest: Control design for PWM converter Baluncore, Mar 3, 2015 at 4:58 PM

    3. Mechanical Engineering

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      Mechanical Engineering

      Sub-Forums

      1. Aerospace Engineering

      2. Automotive Engineering

      Latest: Eliminating use for lubrication in an engine? Paul J. Daniels, Mar 4, 2015 at 12:19 AM

    4. Electrical Engineering

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      Latest: How do semiconductors affect a circuit? Devguy101, Mar 4, 2015 at 12:44 AM

    5. Materials and Chemical Engineering

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      Latest: Reflectance or reflectivity spectrum interpretation Simon Bridge, Mar 3, 2015 at 10:50 PM

    6. Nuclear Engineering

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      Latest: List of Neutron Moderators Astronuc, Mar 3, 2015 at 8:21 PM

  6. Other Sciences

    1. Chemistry

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      Latest: How good is HCN addition to aromatic conjugated aldehyde? K.z_z, Mar 3, 2015 at 3:58 PM

    2. Biology

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      Latest: What the heck is this? Bystander, Mar 4, 2015 at 1:03 AM

    3. Medical Sciences

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      Latest: is there any nutritional benefit to eating moltose dextrin Greg Bernhardt, Mar 3, 2015 at 11:07 PM

    4. Programming and Computer Science

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      Latest: Creating new algorithm like PID mfb, Mar 3, 2015 at 3:57 PM

    5. Earth

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      Latest: Villarrica volcano davenn, Mar 3, 2015 at 9:39 PM

    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? Hercuflea, Mar 2, 2015 at 10:56 AM

  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

      5. Relationships

      6. Social Sciences

      Latest: 'Star Trek' icon Leonard Nimoy dies at age 83 dipole, Mar 4, 2015 at 12:03 AM

    2. Science Fiction and Fantasy

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      Science Fiction and Fantasy

      Sub-Forums

      1. Science Fiction Writing

      Latest: Who is your favorite SciFi character? m_robertson, Mar 3, 2015 at 2:13 PM

    3. Feedback and Announcements

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      Feedback and Announcements

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      1. PF Member Awards 2014

      Latest: Queries on editor buttons Bystander, Mar 4, 2015 at 1:05 AM

    4. New Member Introductions

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      Latest: Greetings to all humans! Silicon Waffle, Mar 4, 2015 at 1:01 AM