1. Homework Help

   1. Introductory Physics Homework

      Sound Interference Problem -- Observer moving between two speakers

   2. Advanced Physics Homework

      Thermodynamic identities

   3. Precalculus Mathematics Homework

      Probability that both are defective

   4. Calculus and Beyond Homework

      First multiple of 2019 with last digits 2018

   5. Biology, Chemistry and Earth Homework

      Help with Copper and Zinc's Effects on Plant Experiment

   6. Engineering and Computer Science Homework

      How to increase the acceptance ratio in python

2. Science Education and Careers

   1. Science and Math Textbooks

      Looking for Math books

   2. Academic Guidance

      Phyics REU personal statement critiques?

   3. Educators and Teaching

      An Accurate Simple Harmonic Oscillator Laboratory - Comments

   4. Career Guidance

      DOE/SULI Summer 2019 Internship

3. Physics

   1. General Physics

      Depth effect in mirror reflections

   2. Classical Physics

      Boltzmann particle distinguishability

   3. Quantum Physics

      Thought experiment -- A radioactive decay detector and randomness

   4. Special and General Relativity

      What happens to the matter inside a black hole?

   5. Atomic and Condensed Matter

      Impact of superconductivity on mechanical properties?

   6. High Energy, Nuclear, Particle Physics

      Theories without a stress tensor

   7. Beyond the Standard Model

      De Sitter Vacua in String Theory and KKLT

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Could singularities be just rips in the space-time fabric?

   2. Cosmology

      Why ##\omega=0## for a matter dominated universe?

5. Mathematics

   1. General Math

      "Define" ℕ from ℤ or ℝ from ℂ, etc..

   2. Calculus

      Surjective function

   3. Differential Equations

      Continuity of Green's function

   4. Topology and Analysis

      Finite distance between two points.

   5. Linear and Abstract Algebra

      What is Kronecker's theorem/lemma for root solutions?

   6. Differential Geometry

      Set of possible rotations of a 3D object and the rotation history

   7. Set Theory, Logic, Probability, Statistics

      The Sum of Geometric Series from Probability Theory - Comments

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      plot of ##\sin(x)/\log(x)##.

6. Engineering

   1. General Engineering

      Custom texture on a part

   2. Mechanical Engineering

      What causes low pressure on a wing?

   3. Electrical Engineering

      Suggestions for a hobby DIY project?

   4. Materials and Chemical Engineering

      Mass Transfer

   5. Nuclear Engineering

      Japan Earthquake: nuclear plants part 2

   6. DIY Projects

      Crystal Radio question

7. Other Sciences

   1. Chemistry

      Gas Solubility in water - constants, and calculations

   2. Programming and Computer Science

      Output of sympy.fourier_transform

   3. Biology and Medical

      Question regarding "Insect Apocalypse"

   4. Computing and Technology

      Problem logging onto sbcglobal.net email.

   5. Earth

      Highest recorded temperature in a given year

8. The Rest Frame Lounge

   1. General Discussion

      Random Thoughts part 6

   2. Science Fiction and Fantasy Media

      Aliens with Control over Gravitons in KHz Range

   3. Feedback and Announcements

      Should we have an "open problems" section in this forum?

   4. New Member Introductions

      Hey! to everyone's hi!

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