1. Homework Help

   1. Introductory Physics Homework

      Changing Acceleration in an Electromagnetics question

   2. Advanced Physics Homework

      Statistical physics question - particles in a magnetic field

   3. Precalculus Mathematics Homework

      proof via mathematical induction

   4. Calculus and Beyond Homework

      Finding the ratio of the volumes of a cube and a sphere

   5. Biology, Chemistry and Earth Homework

      Genetics Problem 1

   6. Engineering and Computer Science Homework

      A heat exchanger is to be used to heat a process liquid with...

2. Science Education and Careers

   1. Science and Math Textbooks

      Physics Journals/Articles About Classical Mechanics

   2. Academic Guidance

      How to best prepare for a physics major

   3. Educators and Teaching

      Helping students transition from High School to University

   4. Career Guidance

      Anyone considering a career as a patent attorney?

3. Physics

   1. General Physics

      What does it mean by 'a is constant' in motion.........'?

   2. Classical Physics

      Spring-mass system and elastic collision

   3. Quantum Physics

      Question about Many Worlds branching in Quantum Mechanics

   4. Special and General Relativity

      Momentum calculation of a rotating rod (part 2)

   5. Atomic and Condensed Matter

      Why are more x-rays made from metal than glass

   6. High Energy, Nuclear, Particle Physics

      Ward Identity - conditions.

   7. Beyond the Standard Model

      Is string theory a deterministic hidden variable theory?

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Synchronous orbits

   2. Cosmology

      WIMP , dark matter

5. Mathematics

   1. General Math

      Verifying an equality

   2. Calculus

      Evaluating an integral issue

   3. Differential Equations

      Derivation of Lax-Wendroff finite volume scheme

   4. Topology and Analysis

      Understanding the "branch cut argument"

   5. Linear and Abstract Algebra

      How to keep the components of a metric tensor constant?

   6. Differential Geometry

      Do Isometries Preserve Covariant Derivatives?

   7. Set Theory, Logic, Probability, Statistics

      A Simplified Synthesis of Financial Options Pricing - Comments

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Solving eigenvalue problems

6. Engineering

   1. General Engineering

      AC vs DC servo motors in large scale cable robot design

   2. Mechanical Engineering

      RTG crane -- hydraulic motor and linkage design to turn these wheels

   3. Electrical Engineering

      LEDs in parallel don't consume the sum of individual currents?

   4. Materials and Chemical Engineering

      Is there a way to increase the efficiency of spdc?

   5. Nuclear Engineering

      Resource(s) for commercial transuranic waste composition?

   6. DIY Projects

      Need help choosing the necessary motor for my first ever DIY project

7. Other Sciences

   1. Chemistry

      In coordinate bond, why doesn't the H^+ atom get a negative charge?

   2. Programming and Computer Science

      Inputting Data into SAS

   3. Biology and Medical

      How does the body know what to sense?

   4. Computing and Technology

      Can a 2-D barcode scanner be used with OCR applications?

   5. Earth

      Mag. 7 Indonesia Earthquake - 5th August 2018

8. PF Lounge

   1. General Discussion

      Graph-paper aversion

   2. Science Fiction and Fantasy Media

      Science review of the movie Contact?

   3. Feedback and Announcements

      PF Server Move

   4. New Member Introductions

      Unsteady flow of water being discharged from a tank.

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