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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.
Graduate Can Buoyancy Create Free Energy?
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Graduate Is there such a thing as true darkness?
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Undergrad Floating Strawberry: Real or Fake?
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Undergrad Is there any absolute proof that photons exist?
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High School How Do I Linearize My Negative Parabola Graph?
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Graduate Are there instances of Simpson's Paradox in Physics?
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Graduate Hammer Effect in Pipelines: Packing, Attenuation & Flow
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High School Can I Test Lightboxes for UV Rays?
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High School Why Do Some People Conduct Electricity and Others Don't?
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Insights Interview with a Physics Mentor: Nugatory - Comments
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High School Difference Between dB and dBA Scales Explained
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High School Voyager 1: How Long Can We Communicate?
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High School Can Antimatter Be Trapped in Thunderstorms?
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High School Question regarding JJ Thompson's Experiment
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Undergrad Understanding Sinusoidal Waves: Motion and Displacement Explained
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High School Does anyone know what this picture on an AP Physics t-shirt means?
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Undergrad Explain the formula, rpm unit conversion
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Graduate Neumann boundary conditions in calculus of variations
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Graduate René Heller's SETI Decrypt Challenge
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High School How Does This Experiment Help Us Understand Vibration?
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Undergrad Hopelessly Confused (Strange Light Distribution)
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High School How Many Layers of Aluminum Foil Are Needed for a Resonant Cavity?
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High School Has any experiment actually measured PI to many places?
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Graduate Progress in measurement of gravitational constant?
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Undergrad Is Thermodynamics the hardest science?
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High School Can someone explain attraction using the 'two people throwing balls' analogy?
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Undergrad What Causes Patterns in Water Droplets with Sound Waves?
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Undergrad Why Do Some Clouds Have a Rainbow Hue?
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Undergrad What is the correct terminology for intensity and effort in exercise?
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High School Unraveling the Science of Sub-Woofers
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Remembering J. D. Jackson: A Tribute to a Physics Legend
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High School Can a Bridge Sing? Solve the Mystery!
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Graduate Two dimensional plane equal absolute nothing
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Photo Contest - Gravity (4/30-5/13)
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Graduate Explaining 'Attenuation' in Water Hammer in Pipelines
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High School Question About Density: Lower Mass, Same Volume?
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Undergrad Can a Sprayed Metal Roof Act as a Cooler and Radiator for a Room?
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High School What is the basic science behind fire?
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Undergrad Understanding Units: Multiply vs Divide
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Undergrad Is It Possible to Create a Natural Vacuum in a Cavern Using Clay and Water?
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Undergrad How Much Does High-Speed Flight Affect Aging?
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Undergrad How can novice scientific enthusiast get ideas disscussed?
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High School Does Methane Gravitationally Differentiate in Air or Mix with Fluid Dynamics?
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High School Question about the states of matter
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Graduate PET scanners -- SNR versus NECR....
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Undergrad David McMahon: The Master of Demystifying Science
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High School Why is there no prefix for 10^5,10^-5 and 10^4 and 10^-4?
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Insights Interview with a Physicist: Sean Carroll - Comments
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High School Traveling microscope vs vernier calliper
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High School Strange Phenomena when the Sun is low on the horizon?
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  • Poll Poll
Current physics PhD students & postdocs: area of research
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Undergrad What are some ways to 'mold'/change the shape of a flame?
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High School Vague definition of the word molecule
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Graduate Why Retraction? New Journal of Physics Investigates
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Undergrad Why is the standard deviation the error on the singular meas
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High School Relative Humidity 10 kilometers (6.2 miles) away....
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High School Amplitude Modulation: Unique Frequency & Bandwidth
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Undergrad Is it Possible to Create a Device that Neutralizes Loud Vehicle Speakers?
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High School Parallex Method: Struggling in 11th Class?
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High School What Causes the Unique Sound of Thunder During Storms?
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High School Solving Confusion with Waves in Physics
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Undergrad Is Pascal's Law Wrong? Debunking the Myth of Equal Pressure in Fluids
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What is the answer to this physics riddle?
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High School Finding a Gas for Physics Experiment
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Insights Why Won't You Look at My New Theory? - Comments
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Undergrad Fourier transform sum of two images
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Graduate Can infinity be observed in the real world?
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High School Debunking Alleged proofs against modern science
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Undergrad How Aristarchus found moon's diameter?
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Undergrad Oscillations and Waves in Fluids
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Undergrad Eratosthene's explanation of the sun's ray
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High School Does "nothing" have a meaning in physics?
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High School IF north pole becomes the south pole....
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Insights Secondary Forces Explored - Comments
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Physicists/Mathematicians: Night Owls or Morning Larks?
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News RIP Sir David Mackay: Physicist, Mathematician, Author
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Undergrad A.P French equation Question -- singing wine glass experiment
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Undergrad What Are the Names of These Four Equations?
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Graduate Reducing standing waves with phase randomization
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Insights Interview with a Physics Mentor: PeterDonis - Comments
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High School Trig question, I'm sure I'm being silly but help please....
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High School Who Created the Inverse Square Law Theory
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Undergrad Pro's and con's of suspended speakers
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Undergrad How to Estimate Uncertainty for a Physical Quantity with Dependent Variables?
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High School Need help to create an experiment
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Graduate Do Wind Turbines Significantly Alter Weather Patterns?
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Graduate Multi Gaussian Beam Derivation | Example Matrix
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Insights Physics Forums Crackpot Index - Comments
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High School What is the True Frequency of Sound When Striking Wood at Different Rates?
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High School Find 3D Models of Waves | Get Creative with 4D Displays
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Graduate Who does the ordinary man contact?
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Undergrad A question about non-conductive materials
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Undergrad What is the most suitable sensor for measuring punch force?
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What is the name of this Laboratory Instrument?
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Undergrad Are Physical Laws Truly Reversible?
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Layperson who promises to try to not be annoying
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High School Specific Gravity of Various Types of Gold
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High School Boxer Versus rattlesnake -- physics motivator
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Graduate Is There Scientific Proof that Particles are 'Aware' of Their Surroundings?
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Undergrad How Can Thinking From First Principles Enhance Critical Thinking?
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