1. Homework Help

   1. Introductory Physics Homework

      Airplane's motion relative to the ground involving wind speed

   2. Advanced Physics Homework

      Quantum Operator Problem

   3. Precalculus Mathematics Homework

      Circle and a line dividing the circumference

   4. Calculus and Beyond Homework

      Complex Variables: Continuity

   5. Biology, Chemistry and Earth Homework

      Convert a number concentration of 15 X 10^12 molecule/cm3 into volume mixing ratio

   6. Engineering and Computer Science Homework

      Calculating percent elongation and determining ductility?

2. Science Education and Careers

   1. Science and Math Textbooks

      Starting in quantum field theory

   2. Academic Guidance

      Getting a mathematics mentor in high school?

   3. Educators and Teaching

      Questions Regarding a Semester Project

   4. Career Guidance

      Jobs for a physicist in Bangladesh?

3. Physics

   1. General Physics

      Both Tension and Friction?

   2. Classical Physics

      Oscillators and conservation of energy

   3. Quantum Physics

      Quantum theory - Nature Paper 18 Sept

   4. Special and General Relativity

      Do black holes accumulate neutrinos?

   5. Atomic and Condensed Matter

      Electron spin resonance in metals

   6. High Energy, Nuclear, Particle Physics

      LRZ for scalar QED

   7. Beyond the Standard Model

      Theories without Fundamental Space and Time

4. Astronomy and Cosmology

   1. Astronomy and Astrophysics

      Why don't man-made satellites drift away from the Earth?

   2. Cosmology

      What are these diagrams showing about GR?

5. Mathematics

   1. General Math

      Is the square root of 945 irrational?

   2. Calculus

      The 10 Commandments of Index Expressions and Tensor Calculus - Comments

   3. Differential Equations

      Finite Difference Scheme - Plume Entrainment

   4. Topology and Analysis

      Möbius strip question

   5. Linear and Abstract Algebra

      Lagrange multipliers on Banach spaces (in Dirac notation)

   6. Differential Geometry

      How do I pass a magnetic field to any coordinate system?

   7. Set Theory, Logic, Probability, Statistics

      Estimation error from estimation quantile of normal distribution

   8. MATLAB, Maple, Mathematica, LaTeX, Etc

      Matlab toolboxes essential for every physicist

6. Engineering

   1. General Engineering

      Efficiency of Base Load Power Plants

   2. Mechanical Engineering

      Turn the press of a button or pulling into a rotation?

   3. Electrical Engineering

      Best way to connect 8 wires together?

   4. Materials and Chemical Engineering

      Need a material that can hold Helium...

   5. Nuclear Engineering

      Granular load factor statistics for the Palo Verde plant

   6. DIY Projects

      Where to get some VIS block, NIR pass plastic sheets?

7. Other Sciences

   1. Chemistry

      Lemonade bomb (spoiler alert for "The Foreigner")

   2. Programming and Computer Science

      Converting PyGame 2 axis joystick float to 360 angle

   3. Biology and Medical

      Practices, Laws, or Principles of living longer

   4. Computing and Technology

      Crashed Android on ZTE Phone -- How to read Log files

   5. Earth

      Why is carbon dating not affected by atmospheric CO2 levels?

8. PF Lounge

   1. General Discussion

      Led Zeppelin's Stairway to Heaven vs Spirit's Taurus

   2. Science Fiction and Fantasy Media

      Questions: Spherical habitat

   3. Feedback and Announcements

      Translating Insights articles

   4. New Member Introductions

      Mandatory Introduction

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