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Physics Forums | Science Articles, Homework Help, Discussion

  1. Homework Help

    1. Introductory Physics Homework

      How to find the acceleration due to gravity inside a planet?

    2. Advanced Physics Homework

      Pipe flow with precipitation at boundary

    3. Precalculus Mathematics Homework

      Composite function

    4. Calculus and Beyond Homework

      Dropping rocks with the x- and y-coordinates being normal.

    5. Biology, Chemistry and Earth Homework

      Finding an element using quantum configuration

    6. Engineering and Computer Science Homework

      Charging battery and monitor current w/ instrumentation amp

  2. Science Education and Careers

    1. Science and Math Textbooks

      Recommendation of a thorough book on suffix/index notation?

    2. Academic Guidance

      Mathematical physics

    3. Educators and Teaching

      Hall's Marriage Theorem

    4. Career Guidance

      I learned that my degree won't arrive in the mail until July

  3. Physics

    1. General Physics

      Why doesn't Q=0 instead of Q=W if T=constant in first law?

    2. Classical Physics

      So tension is not a force...?

    3. Quantum Physics

      QFT and Entanglement

    4. Special and General Relativity

      Writing Metrics in Matrix Form - Method?

    5. Atomic and Condensed Matter

      Understanding the Seebeck effect

    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

      Oumuamua may be an alien lightsail?

    2. Cosmology

      The expansion of the Universe?

  5. Mathematics

    1. General Math

      Math Challenge - November 2018

    2. Calculus

      A Numerical Insight for the Fundamental Theorem of Calculus - Comments

    3. Differential Equations

      Boundary condition 1D beam

    4. Topology and Analysis

      Completeness of a basis function

    5. Linear and Abstract Algebra

      Representation of elements of the Grassmannian space

    6. Differential Geometry

      Hodge dual

    7. Set Theory, Logic, Probability, Statistics

      Instrumental error and statistical error

    8. MATLAB, Maple, Mathematica, LaTeX, Etc

      To print a simple function

  6. Engineering

    1. General Engineering

      Maximum gain possible by sound wave focusing

    2. Mechanical Engineering

      Driving an RC car in a vertical loop, What formula to use?

    3. Electrical Engineering

      How many peltier elements can I use in my power outlet?

    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

      Polypropylene question: "high heat tolerance"

    2. Programming and Computer Science

      Is machine learning entirely based on decision tree?

    3. Biology and Medical

      Why does reduced diameter decrease flow?

    4. Computing and Technology

      Anti-virus and Internet Security Software

    5. Earth

      Pleistocene meteor crater on Greenland

  8. The MC Square

    1. General Discussion

      Revolution under the influence of a central force

    2. Science Fiction and Fantasy Media

      Need help crafting a cataclysm (for SF novel)

    3. Feedback and Announcements

      Possibility of PGN Display

    4. New Member Introductions

      Gerson from UFU, Brazil