1. Homework Help

   1. Introductory Physics Homework

      Finding Work of spring and friction with changing angle

   2. Advanced Physics Homework

      Wire surrounded by a linear dielectric in a uniform E field

   3. Precalculus Mathematics Homework

      Composite function

   4. Calculus and Beyond Homework

      Volume of revolution around the y-axis

   5. Biology, Chemistry and Earth Homework

      Heat of neutralization

   6. Engineering and Computer Science Homework

      I need help loading a data set from R

2. Science Education and Careers

   1. Science and Math Textbooks

      Recommendation of a thorough book on suffix/index notation?

   2. Academic Guidance

      Suggestions for studying Electromagnetism

   3. Educators and Teaching

      Hall's Marriage Theorem

   4. Career Guidance

      DOE CCI VS. SULI

3. Physics

   1. General Physics

      Force as a function of time/space

   2. Classical Physics

      So tension is not a force...?

   3. Quantum Physics

      Quantization of the electric field inside a box

   4. Special and General Relativity

      Newtonian analogue of energy-momentum relation?

   5. Atomic and Condensed Matter

      PN junction Diode

   6. High Energy, Nuclear, Particle Physics

      Does background radiation have a diurnal variation?

   7. Beyond the Standard Model

      Quantization isn't fundamental

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Ideas to protect the Earth from possible asteroid impacts

   2. Cosmology

      The expansion of the Universe?

5. Mathematics

   1. General Math

      Math Challenge - November 2018

   2. Calculus

      Order of poles of z∕Sin(πz²)

   3. Differential Equations

      Boundary condition 1D beam

   4. Topology and Analysis

      Which branch of mathematics talks about this?

   5. Linear and Abstract Algebra

      Representation of elements of the Grassmannian space

   6. Differential Geometry

      Hodge dual

   7. Set Theory, Logic, Probability, Statistics

      Defining the membership relation in set theory?

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Solution to Associate Legendre's Eq

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

      How dangerous is exposure to chromium-6?

   2. Programming and Computer Science

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

   3. Biology and Medical

      Why does reduced diameter decrease flow?

   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

      Hi everyone

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