1. Homework Help

   1. Introductory Physics Homework

      Lenz law: North pole of bar magnet moves away from a coil

   2. Advanced Physics Homework

      Proving stable equilibrium: Rotating circular hoop

   3. Precalculus Mathematics Homework

      Converting a value material parameter

   4. Calculus and Beyond Homework

      Show that for all n ∈ Z (>0), g(n) > f(n)

   5. Biology, Chemistry and Earth Homework

      Titration -- What went wrong?

   6. Engineering and Computer Science Homework

      Problem with plotting a function in MATLAB

2. Science Education and Careers

   1. Science and Math Textbooks

      High order nonlinear operator split method

   2. Academic Guidance

      Do employers care about abet accreditation?

   3. Educators and Teaching

      Teaching Economics Without Calculus

   4. Career Guidance

      Need help getting back into a helpdesk position

3. Physics

   1. General Physics

      Current Flow Through a Common Part of a Circuit (batteries and light bulbs)

   2. Classical Physics

      Measuring the speed of sound

   3. Quantum Physics

      Two particles Dirac type equation question

   4. Special and General Relativity

      Relativity (the basics)

   5. Atomic and Condensed Matter

      Is block spin still ±1?

   6. High Energy, Nuclear, Particle Physics

      Need Help Co-60 Shielding Mcnp Activity Input

   7. Beyond the Standard Model

      Muller's 'Now and the Flow of Time' - what's up?

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Why is Oxygen so abundant?

   2. Cosmology

      When will the universe end?

5. Mathematics

   1. General Math

      2D Fourier transform orientation angle

   2. Calculus

      A rigorous definition of a limit and advanced calculus

   3. Differential Equations

      Inverse ODE, Green's Functions, and series solution

   4. Topology and Analysis

      I want to study topology

   5. Linear and Abstract Algebra

      On a finitely generated submodule of a direct sum of modules...

   6. Differential Geometry

      Surface Metric Computation

   7. Set Theory, Logic, Probability, Statistics

      The CDF from the Characteristic Function

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Coding up the step function

6. Engineering

   1. General Engineering

      Electromagnetic physical force feedback

   2. Mechanical Engineering

      Car's braking distance formula

   3. Electrical Engineering

      Some fundamental questions about pn junction

   4. Materials and Chemical Engineering

      Material for rib pad

   5. Nuclear Engineering

      Critical mass for nuclear fusion

   6. DIY Projects

      Anyone know a stong light material?

7. Other Sciences

   1. Chemistry

      Will White Vinegar Corrode My Sink If Used for Cleaning?

   2. Programming and Computer Science

      Java: Which Term determines this is a Sum?

   3. Biology and Medical

      Blood Donor in Australia Affected Millions

   4. Computing and Technology

      Legacy Database Reverse Engineering and Methodology

   5. Earth

      Hawaii's Kilauea volcano eruption

8. PF Lounge

   1. General Discussion

      Financial Knowledge All Adults Should Know?

   2. Science Fiction and Fantasy Media

      Avengers: Infinity War

   3. Feedback and Announcements

      What happened to the number of thread views?

   4. New Member Introductions

      Hello, I'm new!

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