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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.
Undergrad What does "exist" mean to a physicist? somt
  • wittgenstein
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High School What is the relationship between mass, density, and volume?
  • Brajesh kedia
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Graduate Why Is My Calculation of Doppler Shift Different from the Standard Formula?
  • JohnnyGui
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High School Why Does Density Affect the Density of its Container?
  • Ryan Reed
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Undergrad Can a Perfect Vacuum be Created & Stretch Space? Answers Here!
  • richard hunter
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High School Is multiplication associative in physics?
  • oahz
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High School How close are we to producing a self-replicating machine
  • bauhaus
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Graduate What is the unit of force in SiC structural optimization?
  • Richie9384
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High School Can Magnets Be Used to Harness Gravity?
  • Mateo C.
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High School What Can Parallax Error Tell Us About the Universe?
  • Rayhaan Jiwani
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Questions on keeping a house cool
  • Cats869
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Undergrad Universal Limits: Are There Other Natural Boundaries?
  • Sturk200
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Undergrad Why do wet things stick together?
  • Kenan
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High School Why can't I test a smoke detector with smoke?
  • Paul Uszak
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Graduate Richard Feynman Lecture Notes: 5 Years of Hughes Research Labs
  • jneer
  • · Replies 10 ·
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High School How to pronounce this term symbol?
  • td21
  • · Replies 7 ·
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Graduate Noise modeling with Markov modeling
  • ramesses
  • · Replies 5 ·
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5
Can You DIY Peltier Plates with Low-Cost Materials?
  • Dvorak
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NSF Video Lectures from 1950s - Where to Find?
  • better361
  • · Replies 2 ·
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Undergrad Why the chemical elements are found together in nature
  • Keln
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7
Graduate What would the atmosphere do if the Earth were to vanish
  • bland
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8
High School What are the essential physics formulas for studying?
  • Greg Bernhardt
  • · Replies 6 ·
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Graduate Fluid problem - periodic forcing over a finite region
  • avenged*7
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8
High School Which Physics Books and Resources Are Best for Beginners?
  • kariandozzy
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High School Discover the Top Physics Reference Book for Foundation Science Students
  • Natasha Rivol
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Undergrad Why do people use a centrifugal force
  • Dopplershift
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Graduate Is there a definition of "hyperdimensional resonance"?
  • danrussotti
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Graduate What physics topics would you like to see on the internet?
  • alemsalem
  • · Replies 1 ·
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High School Weapon that produces the same effect as a taser?
  • hydrogenandwate
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Undergrad Is the distance between any object infinite?
  • ujellytek
  • · Replies 57 ·
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Graduate Spatial Frequencies of the Fourier Transform
  • ecastro
  • · Replies 8 ·
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Graduate Surface treating mild steel for hard vacuum
  • norlesh
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3
Undergrad Does the Diameter of a Barometer Tube Affect the Height of the Mercury Column?
  • praveenbm5
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High School What should I teach myself this summer?
  • Ju00611
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Undergrad How Long Can a Wire Be? Laws of Physics and Wire Length Explained
  • rede96
  • · Replies 129 ·
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Pentaquark Discovery: LHC Research Teams Reveal Evidence
  • Math Amateur
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High School The Science Behind the Blue Evening Sky: Why is it Blue Instead of Red/Orange?
  • Fiona Rozario
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Undergrad Who Emits UV in Fluorescent Lamps?
  • giuliopascal
  • · Replies 3 ·
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Undergrad Opinions on science communicators?
  • TRB8985
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High School Understanding Physics: What is Time?
  • revv
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Undergrad What affects the rate of evaporation in a material?
  • Cibek
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Undergrad What does exponential growth really mean?
  • jaydnul
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High School Can We Transfer Energy from the Sun? - James Bond "Day Another Day
  • Stephanus
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High School Comparing Silver and Gold Melting Points: Understanding Coefficient C/G °C
  • natureboy
  • · Replies 4 ·
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Graduate What Is the Connection Between Viscosity and Shear Stress in Perfect Fluids?
  • better361
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Undergrad Should We Use Tau Instead of Pi in Physics Papers?
  • Timothy S
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High School Can You Get Electricity From Car Catalyst?
  • fysik
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Undergrad Can I Connect a Smaller Valve to a Varian M4 Diffusion Pump for Lower Costs?
  • SupaVillain
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Undergrad Can We Create a Visual Radio Camera?
  • Tracy Rose
  • · Replies 10 ·
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Undergrad Does our perception of time vary based on our location in the universe?
  • James Mitchell
  • · Replies 4 ·
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News Which astrophysicists, best qualified to review a manuscript
  • art pletcher
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Graduate Analysis of Standing Waves on a Fixed-End String
  • kelvin490
  • · Replies 11 ·
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I was wondering if such a pistol can exist?
  • hydrogenandwate
  • · Replies 1 ·
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Graduate Question about force in transverse waves on a string
  • kelvin490
  • · Replies 4 ·
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Undergrad Hearing which natural frequencies
  • Tam Le
  • · Replies 3 ·
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Undergrad What is a Rate? Should Pressure be Defined as a Rate?
  • alkaspeltzar
  • · Replies 7 ·
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High School At Home Experiments to Prove Scientific Facts
  • micromass
  • · Replies 25 ·
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Undergrad Short, intensive physics/math courses
  • Eric Schmidt
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Graduate Primary Sources for Measurement of g
  • brainpushups
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High School What Happens When Two Bubbles Interact?
  • caters
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Graduate Fluorescence of fused silica, quartz and Borofloat 33?
  • Yinxiao Li
  • · Replies 1 ·
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Where Can I Find Dr. Leonnard Susskind's Quantum Mechanics Lectures on DVD?
  • p75213
  • · Replies 21 ·
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Undergrad What changes does human body exert when it enters a room ?
  • Sourav Jaiswal
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Undergrad Piezo materials -- piezo cable under saddle pickup for accoustic guitars
  • ryanuser
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High School What Can We Learn About Pluto and Charon from New Horizons?
  • BobG
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Undergrad Could a planet's atmosphere produce flares?
  • jack476
  • · Replies 4 ·
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Why Is Physics Least Popular in July?
  • ZapperZ
  • · Replies 8 ·
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Undergrad Understanding Vector Notation: The Role of i, j, and k as Standard Unit Vectors
  • J-dizzal
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Graduate Do sound waves affect the distance between protons in an atom?
  • HawkI
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Graduate Is absolute count of emission spectrum meaningful?
  • Yinxiao Li
  • · Replies 3 ·
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Undergrad What is the coffee ring of toluene and hexane?
  • Yinxiao Li
  • · Replies 3 ·
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Graduate Can a Leaking Argon Gas Line Draw in Air and Create a Mixture?
  • Bladestein
  • · Replies 7 ·
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High School Battery Capacity: 3800 mAh vs 5800 mAh
  • MiranaSyy
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Graduate Is the Delayed Choice Experiment Defining Our Understanding of Time?
  • Swamp Thing
  • · Replies 2 ·
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Design Your Own Physics Monopoly Board | Fun Ideas & Suggestions
  • Greg Bernhardt
  • · Replies 13 ·
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Undergrad How have I managed to excel in physics despite health challenges?
  • TubbaBlubba
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Undergrad Error in least squares fit: how to include error of points?
  • ORF
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High School Why Are Derived Units Formed by Multiplying and Dividing Basic Units?
  • Deepak K Kapur
  • · Replies 18 ·
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Finding Free Chemistry & Physics Articles Online
  • Garlic
  • · Replies 3 ·
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Undergrad Exploring Nature: Joining Discussions on Software Testing and Astronomy
  • P.Schuurmans
  • · Replies 14 ·
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How to wet cotton wool without shrinking it?
  • kevin_tee
  • · Replies 1 ·
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Graduate Understanding the Vacuum Debye Screening Length: Importance and Calculation
  • eftrsd
  • · Replies 2 ·
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Insights Gravity animation: lessons learned - comments
  • edguy99
  • · Replies 7 ·
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Graduate Understanding Diffusion: The Relationship Between RMS and Fick's 2nd Law
  • Lindsayyyy
  • · Replies 1 ·
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High School Why Do We See Color & Texture?
  • welshtyke
  • · Replies 2 ·
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Undergrad Audibility of a compression wave
  • jerromyjon
  • · Replies 5 ·
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Insights Physics Blogs You Need to Be Reading - Comments
  • Greg Bernhardt
  • · Replies 5 ·
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Graduate Planck Measurements: Meaning or Trite Observation?
  • Gaz1982
  • · Replies 1 ·
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Graduate Do things happen the way they can?
  • dayalanand roy
  • · Replies 7 ·
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High School How can standing waves be created on a string fixed at both?
  • MP2491
  • · Replies 2 ·
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High School Earth Shadow Tapering: Why Does It Happen?
  • oreo
  • · Replies 5 ·
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The Bicycle Inventor's Mystery: How Did They Know?
  • cnh1995
  • · Replies 4 ·
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Undergrad Modeling Functions.... real life business, money, probability, etc.
  • Solid Snake
  • · Replies 3 ·
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High School Why does the tropical sun feel hotter in the evening?
  • mdique
  • · Replies 1 ·
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Graduate How do we justify the generality of the wave equation?
  • Sturk200
  • · Replies 3 ·
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Insights Is Energy Only What We Think It Is?
  • Dale
  • · Replies 42 ·
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High School How Do Sound Waves Influence Water Flow?
  • kkpanu9
  • · Replies 3 ·
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High School Nobody here can explain the Leedskalnin discovery
  • Magatron
  • · Replies 24 ·
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High School IDL (interactive data language) material wanted
  • mmont012
  • · Replies 2 ·
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Graduate Why does atrial depol cause upward deflection on EKG?
  • drana91
  • · Replies 5 ·
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