1. Homework Help

   1. Introductory Physics Homework

      Entropy and the partition function for nitrogen

   2. Advanced Physics Homework

      Polymer Chain in Statistical Mechanics

   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

      Suggestions for 9th Grade Physics Textbooks?

   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

      Materials that allow IR or UV light to pass through?

   2. Classical Physics

      Partial Differentiation in Lagrange's Equations

   3. Quantum Physics

      How to shorten this speech about BH?

   4. Special and General Relativity

      Derivation of the Einstein equations

   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

      Big slurp

5. Mathematics

   1. General Math

      A formula for the number of structures composed of n squares

   2. Calculus

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

   3. Differential Equations

      Is the exponential function, the only function where y'=y?

   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

      Lowest probability for physical possibility

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Practice writing LaTex

6. Engineering

   1. General Engineering

      Cooling System-What is the main purpose of the Compressor

   2. Mechanical Engineering

      Some points about a vortex tube

   3. Electrical Engineering

      What does a lightbulb prefer? Volts or Amps?

   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

      CT Scan image reconstruction (80 KeV vs 80 kVp)

   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

      Why Fathers Get Gray Hair

   2. Science Fiction and Fantasy Media

      Physics in an old TV show

   3. Feedback and Announcements

      PF culture is toxic

   4. New Member Introductions

      About me

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