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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.
High School Question about intensity and area
  • qazxsw11111
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In your own personal life, how often do you use this equation?
  • eratosthenes2
  • · Replies 20 ·
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Graduate Time Travel: No worry about paradoxes
  • Whitestar
  • · Replies 31 ·
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Expansion coefficient of liquid Propane ?
  • bitman
  • · Replies 4 ·
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4
Undergrad Comparing Illuminance and Solar Radiation in Dragonfly Habitat
  • Darcy
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4
High School Can Anyone Clarify These Physics Formulas?
  • angelzery
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5
Graduate Are You Ready to Tackle Roger Penrose's Road to Reality Exercises?
  • lark
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Undergrad The most misleading stereotypes about physics
  • Loren Booda
  • · Replies 84 ·
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Graduate What Is Your Interpretation of Quantum Mechanics: Shut Up and Calculate?
  • thenewmans
  • · Replies 31 ·
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High School Question about draft (probably wind blowing up in your room)
  • Physicsissuef
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Undergrad What are the expansion coefficients of diesel fuel?
  • lordgord
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2
High School Does the proximity of a string to a spinning object affect its speed?
  • liongoth
  • · Replies 11 ·
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Undergrad What is the Flaw in this Perpetual Motion Machine?
  • maxpower2008
  • · Replies 4 ·
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4
High School What are some of these scales based on?
  • ShawnD
  • · Replies 4 ·
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4
High School What's the relation be zmole and mole?
  • BiBByLin
  • · Replies 1 ·
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High School Is a Slide Rule Worth It for New Physics Students?
  • robertm
  • · Replies 15 ·
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High School Energy & Gravity: Mutual Attraction Explained
  • Peaceful
  • · Replies 2 ·
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2
What Inspired Your Career in Physics?
  • Daniel Y.
  • · Replies 16 ·
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Graduate Some help with calculations please
  • Cups
  • · Replies 14 ·
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14
Undergrad Levitation - what the heck is this?
  • pellman
  • · Replies 7 ·
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7
Undergrad "Was Feynman's license plate ARW 357 a subtle physicist joke?
  • bill nye scienceguy!
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4
Graduate Are There Multiple Big Bangs?
  • Nenad G.
  • · Replies 6 ·
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6
What courses are available on Youtube through NPTEL?
  • siddharth
  • · Replies 8 ·
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8
What is the Effect Bifinda - Brauna and how can it help me?
  • tuananh3ap
  • · Replies 3 ·
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3
High School The Mystery of Time Travel: A Keen Amateur's Question | Physics Help
  • sammy8761
  • · Replies 21 ·
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Undergrad Non-Euclidean Recommended books
  • bloomy555
  • · Replies 1 ·
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1
Mysterious Letter Sent To Fermilab
  • ZapperZ
  • · Replies 20 ·
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20
High School Counting Raindrops in Wichita, KS
  • moe7404
  • · Replies 11 ·
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11
Is Enthusiasm Enough to Thrive in Physics Forums?
  • KirkDamborg
  • · Replies 16 ·
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High School Imperial, metric, U.S. customary units
  • Expl1c1t
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5
Undergrad Water-Filled Balloon Experiment in Zero Gravity: Interactions of Air Bubbles
  • sketchtrack
  • · Replies 12 ·
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12
Graduate Why Does Time Expand? Spacetime Explained
  • epkid08
  • · Replies 10 ·
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10
Is it possible to obtain a published paper for free through this forum?
  • sogdiana
  • · Replies 10 ·
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10
Most efficent Portable Energy sources
  • maurice_z
  • · Replies 4 ·
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4
High School Tea in Milk: Reasons for Floating Upwards
  • springBreeze
  • · Replies 9 ·
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9
  • Poll Poll
Graduate How Is the Smolin Impact Ratio Influencing Physics Research Trends?
  • marcus
  • · Replies 27 ·
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27
High School Who Created an Electromagnetic Anti-Gravity Field?
  • provigilken
  • · Replies 6 ·
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Graduate What Are the Key Physics Concepts Discussed on Sciam.com and Physicsforums.com?
  • Englishman
  • · Replies 19 ·
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Graduate Proposed US Budget A Major Blow to High Energy Physics
  • ZapperZ
  • · Replies 52 ·
2
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Undergrad Motorcyclist falls off but bike stays upright
  • Hot Rod SS
  • · Replies 18 ·
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18
High School Area efficiency of Miles Per Gallon
  • only_huce
  • · Replies 6 ·
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6
CERN LHC: Risk of "Doomsday" Destruction?
  • FredGarvin
  • · Replies 27 ·
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I come to these forums for one thing and one thing only.
  • Anonymouss
  • · Replies 1 ·
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High School Feynman Lectures: Is It Worth The Money?
  • mr-tom
  • · Replies 4 ·
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Graduate Chris Morris Visits the LHC (The Guardian UK)
  • neu
  • · Replies 3 ·
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3
Graduate Is Time Travel Possible as Depicted in Movies?
  • ManDay
  • · Replies 34 ·
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Is the glowing object always visible between 11pm and 12am?
  • tgt
  • · Replies 38 ·
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High School Why Do Systems Have Organization?
  • Gear300
  • · Replies 11 ·
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11
Undergrad Is Cold Fusion for real this time?
  • SF
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12
News Global Warming based on solar flares?
  • WarPhalange
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2
High School Is Null Physics a Legitimate Theory or Just a Crackpot Idea?
  • maverick_starstrider
  • · Replies 4 ·
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4
Graduate Loop-String companionship at the 2008 Bad Honnef conference
  • marcus
  • · Replies 1 ·
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1
  • Poll Poll
Graduate String research down 33% in one year-ideas why?
  • marcus
  • · Replies 14 ·
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14
Graduate Human mind has a relatively large degree of freedom
  • Gear300
  • · Replies 24 ·
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24
High School Inquiries on Vacuum Sphere: Spinning and Weight Difference
  • SPS
  • · Replies 3 ·
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3
Graduate Does Quantum Mechanics Disprove Causality?
  • MetricBrian
  • · Replies 15 ·
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15
Graduate Consciousness of Double Slit Observer
  • mbilitatu
  • · Replies 6 ·
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6
Undergrad What Does Vc Mean? Kennedy Space Center Plaque
  • BenTev28
  • · Replies 10 ·
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10
Q: Is there a prototype vehicle that can go faster than the speed of light?
  • arbol
  • · Replies 15 ·
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15
Undergrad Why is mercury a liquid even though its atoms are closely packed
  • jablonsky27
  • · Replies 4 ·
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4
Undergrad How the acceleration of gravity is almost equal to pi squared?
  • LuGoBi
  • · Replies 7 ·
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7
High School How can you prove the earth is round?
  • bani123
  • · Replies 11 ·
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11
Undergrad Anti-LHC Guy Walter L Wagner: Credentials & Misinformation
  • diewlasing
  • · Replies 4 ·
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4
Is This the Future of Space Communication?
  • matthyaouw
  • · Replies 4 ·
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4
Graduate Which Software Calculates TE and TM Fields in a Two-Core System?
  • zdarova
  • · Replies 1 ·
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Graduate A quote regarding entanglement, looking for an interpretation.
  • Anony-mouse
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Undergrad Microphone in Vacuum: What Would Happen?
  • Nick89
  • · Replies 10 ·
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Graduate Scalar waves, is this a complete fabrication?
  • Ulysees
  • · Replies 23 ·
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High School Understanding the Conversion: Pounds to Kilograms Explained
  • shamrock5585
  • · Replies 9 ·
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9
Undergrad Can Matter Truly Exist in Four States According to Einstein's e=mc2?
  • Tompuckett
  • · Replies 18 ·
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High School Can Shooting Locks in Movies be Realistic?
  • wolram
  • · Replies 17 ·
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17
Undergrad Are There Prefixes for Decimal Places Between the Commonly Used Ones?
  • EebamXela
  • · Replies 7 ·
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7
High School Can Nikola Tesla's Concepts Power a UFO-like Flying Vehicle?
  • fromnothing
  • · Replies 3 ·
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3
High School What software is recommended for graphic design and integration with LaTeX?
  • waxranger
  • · Replies 6 ·
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6
Undergrad Maximizing Solar Energy Output: The Role of Physics in Solar Tracker Design
  • zaf
  • · Replies 3 ·
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3
High School Free Video Lectures - Learn Calculus Online
  • Oneiromancy
  • · Replies 6 ·
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6
Can anyone give an approximation as to when CERN starts testing?
  • Gear300
  • · Replies 2 ·
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2
High School Why the clock hands turn clockwise?
  • pixel01
  • · Replies 49 ·
2
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Undergrad Conversion from cm^{-1} to eV - Ask Here!
  • carlo
  • · Replies 7 ·
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7
High School Min. Tone Bar Size for Electromechanical Doorbell
  • dirzsignature
  • · Replies 6 ·
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6
  • Poll Poll
Graduate Is the Big Bang No Longer the Beginning?
  • marcus
  • · Replies 2 ·
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2
Turn Off Gravity: Elevator at Work Mystery
  • oedipa maas
  • · Replies 7 ·
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7
Undergrad The Multiple Launch Rocket System and Rocket Noises
  • bitrex
  • · Replies 1 ·
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1
Graduate Raman Microscopy: Best Way to Hold Micron-sized Polystyrene Beads
  • n0_3sc
  • · Replies 3 ·
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3
What Is the Lawrence Berkeley Pocket Book?
  • darkfall13
  • · Replies 1 ·
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1
Mudwrestling Physics: Learn to Win Your Match
  • Lesley Bian
  • · Replies 17 ·
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17
  • Poll Poll
Graduate Citation to string has crashed-any idea why?
  • marcus
  • · Replies 3 ·
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3
Famous Overweight Physicists and Mathematicians
  • samalkhaiat
  • · Replies 15 ·
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15
Nobody complains about physicists' math?
  • jostpuur
  • · Replies 117 ·
4
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117
Willis Lamb 1913-2008 | Physicist & Nobel Laureate
  • Dr Transport
  • · Replies 1 ·
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Say Hi to Web Developer from Philippines Interested in Physics
  • dirty9
  • · Replies 45 ·
2
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45
High School I need to create a demonstration
  • Senseiofj
  • · Replies 2 ·
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2
How does one pronounce de Broglie ?
  • rock.freak667
  • · Replies 32 ·
2
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High School Table Tennis Problem: Explaining Edge vs. Side to Friend
  • StefanArak
  • · Replies 15 ·
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15
High School Treasure hunting metal detectors
  • wolram
  • · Replies 1 ·
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1
High School Will time travel ever come to an end?
  • Y00
  • · Replies 29 ·
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29
Graduate What are the implications of neutrino mass on the universe?
  • humanino
  • · Replies 2 ·
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2
Einstein or Newton, the better man?
  • immel
  • · Replies 25 ·
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25
Graduate Photons and neutrons [Pseudo-science warning]
  • Gemstone
  • · Replies 7 ·
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7
High School What Determines the Characteristics of a Wave?
  • baywax
  • · Replies 41 ·
2
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41