Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physics Forums - The Fusion of Science and Community

  1. Science Education

    1. Homework and Coursework Questions

      Discussions:
      245,976
      Messages:
      1,446,948
      Latest: Velocity from Acceleration

    2. Science and Math Textbooks

      Discussions:
      4,992
      Messages:
      31,381
      Latest: Brief Conceptual Books

    3. Open Practice Problems

      Discussions:
      14,160
      Messages:
      14,219
      Latest: Solving an area problem in Multivariable Calculus, Polar mode

    4. Academic Guidance

      Discussions:
      24,115
      Messages:
      199,126
      Latest: Bohr's atomic model

    5. Educators and Teaching

      Discussions:
      505
      Messages:
      6,906
      Latest: Are there any books about how to teach nuclear reactor physics?

    6. Career Guidance

      Discussions:
      6,034
      Messages:
      49,642
      Latest: Feeling inadequate

  2. Physics

    1. General Physics

      Discussions:
      43,577
      Messages:
      362,645
      Latest: Resistor and current in a circuit

    2. Classical Physics

      Discussions:
      23,165
      Messages:
      171,372
      Latest: Torque on a rod?

    3. Quantum Physics

      Discussions:
      21,245
      Messages:
      228,151
      Latest: (Conceptual) Infinity energy via quantum tunneling & Nuclear Fusion?

    4. Special and General Relativity

      Discussions:
      17,341
      Messages:
      255,536
      Latest: Schwarzschild - deSitter Metric

    5. Atomic & Condensed Matter

      Discussions:
      5,586
      Messages:
      28,182
      Latest: Phonon detection

    6. High Energy, Nuclear, Particle Physics

      Discussions:
      7,035
      Messages:
      52,063
      Latest: QED propagator in Coulomb gauge

    7. Beyond the Standard Model

      Discussions:
      5,097
      Messages:
      63,351
      Latest: M-theory and loop quantization of higher dimensional SUGRA

  3. Astronomy and Cosmology

    1. Astronomy and Astrophysics

      Discussions:
      11,602
      Messages:
      111,442
      Latest: U.S. Solar Eclipse of Aug. 21, 2017

    2. Cosmology

      Discussions:
      6,092
      Messages:
      78,780
      Latest: Why hasn't the light from the CMB already passed us?

  4. Mathematics

    1. General Math

      Discussions:
      17,603
      Messages:
      132,718
      Latest: Help with trig please

    2. Calculus

      Discussions:
      13,766
      Messages:
      82,380
      Latest: Small angle expansions for sin, cos, and tan

    3. Differential Equations

      Discussions:
      4,930
      Messages:
      23,616
      Latest: Second order PDE with variable coefficients

    4. Topology and Analysis

      Discussions:
      1,282
      Messages:
      8,774
      Latest: Homotopy Definitions

    5. Linear and Abstract Algebra

      Discussions:
      9,093
      Messages:
      57,729
      Latest: How to prove The Cayley-Hamilton Theorem?

    6. Differential Geometry

      Discussions:
      3,625
      Messages:
      23,598
      Latest: About extrinsic curvature

    7. Set Theory, Logic, Probability, Statistics

      Discussions:
      7,436
      Messages:
      45,201
      Latest: Counterexample Required (Standard Notations)

    8. Math Software and LaTeX

      Discussions:
      4,691
      Messages:
      21,220
      Latest: Sample Code for Monte Carlo estimation of pi

  5. Engineering

    1. General Engineering

      Discussions:
      7,841
      Messages:
      56,483
      Latest: Any engineers out there know what the heck set up is?

    2. Mechanical Engineering

      Discussions:
      12,194
      Messages:
      82,385
      Latest: Particle Reynolds number / max entrained particle size

    3. Electrical Engineering

      Discussions:
      18,485
      Messages:
      142,156
      Latest: Series and parallel components

    4. Materials and Chemical Engineering

      Discussions:
      2,852
      Messages:
      12,502
      Latest: Looking for advice on a type of product I want to develop

    5. Nuclear Engineering

      Discussions:
      1,827
      Messages:
      38,318
      Latest: Japan Earthquake: nuclear plants part 2

  6. Other Sciences

    1. Chemistry

      Discussions:
      8,022
      Messages:
      44,641
      Latest: Standard Temp and Pressure -- old values (pre-1982) still prevalent

    2. Programming and Computer Science

      Discussions:
      5,477
      Messages:
      37,913
      Latest: Matlab to Excel

    3. Biology and Medical

      Discussions:
      8,705
      Messages:
      77,545
      Latest: Zoology: Is interspecific sex common in wild life?

    4. Computing and Technology

      Discussions:
      6,370
      Messages:
      49,064
      Latest: Any Phone Apps that Can Surreptitiously Record?

    5. Earth

      Discussions:
      2,007
      Messages:
      23,663
      Latest: Satellite temperature data vs ground based data

  7. PF Lounge

    1. General Discussion

      Discussions:
      39,798
      Messages:
      988,194
      Latest: Lame Jokes

    2. Science Fiction and Fantasy

      Discussions:
      1,130
      Messages:
      19,535
      Latest: Personnel Warp

    3. Feedback and Announcements

      Discussions:
      4,211
      Messages:
      48,057
      Latest: Should mentors and moderators be separate?

    4. New Member Introductions

      Discussions:
      6,501
      Messages:
      17,254
      Latest: Textbook for advanced calculus