1. Homework Help

   1. Introductory Physics Homework

      Radius of a particle's path in a B field and magentic momentum force

   2. Advanced Physics Homework

      First order perturbation energy correction to H-like atom

   3. Precalculus Mathematics Homework

      Area of a triangle

   4. Calculus and Beyond Homework

      Doubt regarding polar vectors

   5. Biology, Chemistry and Earth Homework

      Van der waal's constants

   6. Engineering and Computer Science Homework

      Are the displacements the same?

2. Science Education and Careers

   1. Science and Math Textbooks

      Are there any resources for questions on primitive roots?

   2. Academic Guidance

      I would like advice on which sub-areas I should follow for two Masters

   3. Educators and Teaching

      Learning How To Teach

   4. Career Guidance

      Associate Engineer degree -- how is it viewed around the world

3. Physics

   1. General Physics

      Can the speed of light be constant and absolute?

   2. Classical Physics

      Does "magnetic charge" fit into vector potential?

   3. Quantum Physics

      Photoelectric Effect via QED?

   4. Special and General Relativity

      GR Verified out to 500 million Light Years

   5. Atomic and Condensed Matter

      Viscosity from DFT (VASP) using the Green-Kubo relation

   6. High Energy, Nuclear, Particle Physics

      Regge theory and QCD

   7. Beyond the Standard Model

      Summing not over configurations, but over theories

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Contoversy about NASA'a Asteroid Tracking

   2. Cosmology

      How does 400 sigma compare with 5 sigma?

5. Mathematics

   1. General Math

      Intermediate Math Challenge - June 2018

   2. Calculus

      Indefinite and definite integral of e^sin(x) dx

   3. Differential Equations

      Generalization of hypergeometric type differential equation

   4. Topology and Analysis

      Topology usefulness

   5. Linear and Abstract Algebra

      Prove that x and x^-1 have same order

   6. Differential Geometry

      First Variation of Jacobi Operator

   7. Set Theory, Logic, Probability, Statistics

      The CDF from the characteristic function

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Practice writing LaTex

6. Engineering

   1. General Engineering

      ANSYS Workbench -- What does "extra deformation shapes" mean?

   2. Mechanical Engineering

      Decarbonizing an Engine with Water: Myth or Fact?

   3. Electrical Engineering

      Selecting an MOV for a power supply

   4. Materials and Chemical Engineering

      Electric potential in Comsol

   5. Nuclear Engineering

      Is it correct to calculate the number of particles

   6. DIY Projects

      How to build your own high frequency oscilloscope

7. Other Sciences

   1. Chemistry

      Has anyone ever dealt with limescale in a bathroom sink?

   2. Programming and Computer Science

      Rotation Measurment with Encoders

   3. Biology and Medical

      A shot in the head turn into a man...

   4. Computing and Technology

      Can stylus be used on any smartphone?

   5. Earth

      May 2018 was Warmest in Recorded History

8. PF Lounge

   1. General Discussion

      Taxes on internet sales

   2. Science Fiction and Fantasy Media

      Physics in an old TV show

   3. Feedback and Announcements

      To delete my own topic

   4. New Member Introductions

      new member

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