1. Homework Help

   1. Introductory Physics Homework

      Finding Work of spring and friction with changing angle

   2. Advanced Physics Homework

      Homework - A galaxy in the local universe

   3. Precalculus Mathematics Homework

      Composite function

   4. Calculus and Beyond Homework

      A different related rates problem - no time mentioned

   5. Biology, Chemistry and Earth Homework

      Do metal atoms have dispersion force?

   6. Engineering and Computer Science Homework

      Charging battery and monitor current w/ instrumentation amp

2. Science Education and Careers

   1. Science and Math Textbooks

      Recommendation of a thorough book on suffix/index notation?

   2. Academic Guidance

      Need help with rejected paper

   3. Educators and Teaching

      Hall's Marriage Theorem

   4. Career Guidance

      I learned that my degree won't arrive in the mail until July

3. Physics

   1. General Physics

      Is the mass of the electron constant?

   2. Classical Physics

      Gravitons vs spacetime curvature

   3. Quantum Physics

      Light rays don't interfere with each other

   4. Special and General Relativity

      Newtonian analogue of energy-momentum relation?

   5. Atomic and Condensed Matter

      What exactly happens during a nuclear reaction?

   6. High Energy, Nuclear, Particle Physics

      Radio Frequency Acceleration in Particle Accelerators

   7. Beyond the Standard Model

      Is the composite Higgs still a thing?

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Parallel Spacetimes?

   2. Cosmology

      The expansion of the Universe?

5. Mathematics

   1. General Math

      Math Challenge - November 2018

   2. Calculus

      How do we integrate x^2/(e^x - 1) from xg to infinity?

   3. Differential Equations

      Boundary condition 1D beam

   4. Topology and Analysis

      Which branch of mathematics talks about this?

   5. Linear and Abstract Algebra

      Kernel of a ring homomrphism

   6. Differential Geometry

      Hodge dual

   7. Set Theory, Logic, Probability, Statistics

      Defining the membership relation in set theory?

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      LMI in Matlab scaling to improve condition number?

6. Engineering

   1. General Engineering

      Maximum gain possible by sound wave focusing

   2. Mechanical Engineering

      Offset slider-crank mechanism

   3. Electrical Engineering

      US solar power generation for 2014-17

   4. Materials and Chemical Engineering

      Tire rubber durometer rating -- stability

   5. Nuclear Engineering

      Spheromak info

   6. DIY Projects

      Video about modifying a new Ryobi electric hand planer

7. Other Sciences

   1. Chemistry

      Disolving NaCl in deionized water gives high pH value

   2. Programming and Computer Science

      Python 3.0 , encoding="utf-8" for encryption

   3. Biology and Medical

      New group of eukaryotes discovered

   4. Computing and Technology

      Changing the background color in browsers

   5. Earth

      Synoptic Chart Interpretation

8. The MC Square

   1. General Discussion

      Not having children to save money

   2. Science Fiction and Fantasy Media

      Lunar Orbital Rings: Math Help Needed

   3. Feedback and Announcements

      Possibility of PGN Display

   4. New Member Introductions

      Southern hemisphere flickering orange/green star

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