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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

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Free advanced physics homework help via qualified mentors. Upper undergraduate and graduate level. Please use the template when requesting help and show your work.

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Free pre-calculus mathematics homework help from qualified mentors. Math courses prior to calculus homework. Please use the template when requesting help and show your work.

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Free calculus and beyond homework help via qualified mentors. Math courses from calculus on-wards homework. Please use the template when requesting help and show your work.

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Free Biology, Chemistry, Geology homework help via qualified mentors. Please use the template when requesting help and show your work. Gain understanding today!

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Free Engineering, Computer Science, and Technology homework help via qualified mentors. Please use the template when requesting help and show your work.

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Thousands of discussions on the best science and math textbooks. Read user reviews, recommend your favorites, and ask for suggestions.

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Browse and request academic advising for all sciences, math and engineering. Topics include school selection, GRE tests, degree information, funding and more. Find the help you need here to navigate and succeed.

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For science and math teachers, professors, instructors, tutors to discuss pedagogy, technology, teaching methods, lesson ideas, class management. Find advice on how to best prepare your students for success.

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Discuss topics on science and math professions. Topics include job descriptions, salary, requirements and responsibilities. Find advice when comparing two or more similar careers.

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Join expert classical physics discussion on the principles developed before the rise of relativity and quantum mechanics. Including mechanics, electrodynamics, thermodynamics, optics.

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Join in expert discussion on atomic and condensed matter. Methods for atoms, molecules, condensed matter. This includes the structure of the atom, its energy states, and its interactions.

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Join in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics and Field Theory.

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Join discussion regarding the different quantum interpretations and foundations. These discussions present some unique challenges since they deal with matters for which there is not an established "right" answer.

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Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.

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Join expert and advanced topics on beyond the standard model of physics. This includes professionally researched theories like strings, branes, and LQG. Mainstream physics only.

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Join expert discussion on High Energy, Nuclear, Particle Physics. Properties, relationships, and interactions of subatomic particles. Experimental and theoretical physics of nuclei and elementary particles.

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Participate in expert physics discussion. Discussion on the nature and properties of matter and energy. This area is for topics that don't fit the other categories. Mainstream physics only.

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Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

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Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.

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Join in expert discussion on general math topics that are not applicable to the specific categories. This includes topics are usually high school math level. Homework help is available.

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Participate in free math proof training events and practice your proofs with expert math guides helping you step by step.

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Join experts in discussion of calculus topics. This may include topics on Elementary functions, Calculating limits, derivatives and integrals. Optimization problems and Homework help is available.

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Join in expert discussion on differential equation topics like ODE and PDE. Differential equations are an equation involving derivatives of a function or functions.

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Participate in expert discussion on topology and analysis topics. This includes point-set topology, Real, complex, harmonic and functional analysis. Also measure and integration theory.

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Join experts in discussing linear and abstract algebra topics. This includes vector spaces and linear transformations. Also groups and other algebraic structures along with Number Theory.

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Join experts in discussing differential geometry topics. This includes manifolds, Tensors and forms. Connections and curvature also. Differential and algebraic topology discussion.

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Join experts in discussion on Set Theory, Logic, Probability, Statistics topics. Fundamentals in Set theory, logic and proofs. Probability and statistics also. Homework help is available.

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Join experts in discussion on math and science software. Discussion and support for Matlab, Mathematica, Stata, Maple, Mathcad, LaTeX and more.

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Join the discussion of general engineering topics. The design, building, and use of engines, machines, and structures. Use the forum for any engineering topics not applicable to the specific categories.

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Join the expert discussion on mechanical engineering topics. This can include topics like the development of machines. Mechatronics, Robotics, Engines, Drafting etc.

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Join the expert discussion on electrical engineering topics. Topics like the uses of electricity and the equipment for power generation. Circuits, Fiber, Signals and Systems, Semiconductor Devices...

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Join expert discussion on aerospace and astronautics. Technology and industry concerned with aviation, space flight and space exploration. Plane, Shuttle and Rocket design, news and concepts. SpaceX, Blue Origin and NASA space agencies.

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Join other experts in discussion on nuclear engineering. Topics on design and construction and operation of nuclear reactors. Radiation Protections, Radioactive Waste, Design, Reactors as well!

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Join the expert discussion on Materials and Chemical Engineering topics. Includes topics on the properties of matter and its applications. Metal Production, Fabrication, Distillation, Corrosion

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Join the expert discussion on chemistry. Chemistry is the study of the nature, properties, and composition of matter. Biochemistry, Organic, Inorganic, Analytical are topics that may be discussed.

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Discuss your DIY project free with expert professionals. Do it yourself (DIY) is the process of building, modifying, or repairing things without the direct aid of professionals.

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Join the expert discussion on biology and medical topics. This may include the study of living organisms, molecular, Botany, Micro, Genetics, Ecology.

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Join the expert discussion on programming topics. Topics like computer algorithms, data structures, A.I., systems, databases, communications, security.

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Join the experts in discussing earth science topics. Earth science is the physical state of the earth and its atmosphere. Such as Geology, Meteorology, Oceanography, Ecology.

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Join the expert discussion on all things computing and technology. This may include topics like computer software, hardware, architecture, security, internet. Use the programming forum for computer science questions.

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Join the fun discussing casual topics sometimes outside the realm of science and technology. Maybe about books, movies, cooking, or general thoughts and commentary. This is a relaxing forum to unwind from the technical topics.

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View our archive for past photo contests run by our member ZapperZ. This are old contests no longer in run.

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Join other sci-fi fans in discussing science fiction and fantasy topics. SciFi and fantasy movies, TV, books, comics, art, games and culture! Are you a Star Wars or Lord of the Rings fan.

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Sci-Fi writers, this forum is for you. Free ideas and advice for your stories from sci-fi fans and science professionals. Find out how to bring in real science for your story.

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Join experts in discussing the humanities like Art, Music, History, and Linguistics. Chat about your favorite composers or poets. Debate the merits of the Roman or Greek civilizations. Find out how the Spanish language was constructed.

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Looking to get your voice heard from PF staff and community? Here we discuss Physics Forums site help, support, comments, suggestions. Official announcements are also published here.

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