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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 Understanding the dispersion of waves
  • stephen8686
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Graduate Your guess (or some ideas) for Nobel 2019
  • lukangled
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4
High School Does the Earth "really" revolve round the Sun?
  • Rohantha W
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4
Undergrad What physics knowledge would be required to build a house?
  • Psinter
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18
Has Anyone read "Physics For Future Presidents"?
  • Avner
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7
High School Will graphene become a wonder material for future inventions?
  • king123
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5
Single Trapped Atom Wins UK Science Photography Prize?
  • DennisN
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22
Is gravity a result of composition and temperature? Share your thoughts!
  • itallcomestoenergy
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17
Undergrad Which Science Underpins All Understanding of the Universe?
  • itallcomestoenergy
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11
High School Do Rocks Absorb and Utilize Solar Energy?
  • CocoLegendary
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Graduate Is computational Physics a hard major?
  • MOKHTAR
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Undergrad Can red blood cells be considered colloids? (soft matter physics)
  • Asuratyr
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High School Melting Ice Caps and Sea Level Rise: Separating Fact from Fiction
  • solarmidnightrose
  • · Replies 11 ·
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11
Photo Contest - MURRAY GELL-MANN (6/8-6/14)
  • ZapperZ
  • · Replies 7 ·
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7
High School Meaning of: Make everything as simple as possible, but not simpler
  • wlcgeek
  • · Replies 29 ·
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29
High School Is there any physical quantity having two different units?
  • Aaditya Jain
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19
Undergrad Why is Density Necessary in the Viscosity Comparison Method?
  • thedy
  • · Replies 1 ·
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High School Physical explanation of eye contact
  • stubbe11
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6
Graduate Understanding Lyaponov Time & Units
  • LagrangeEuler
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3
High School What is the object's orbital path shown in the image?
  • cptolemy
  • · Replies 9 ·
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9
How Did Charles Kittel Impact Modern Physics Education?
  • member659127
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Undergrad Flow Dynamics of Sluice Gates & Groynes
  • math04
  • · Replies 9 ·
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9
Graduate Understanding the Wilhelmy Plate Method for Calculating Surface Tension
  • lyhuyen
  • · Replies 1 ·
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1
Graduate Who Will Be Awarded the Nobel for QCD Now that Murray Gell-Mann Has Died?
  • George Jones
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5
News Are We Ready for the New Definition of the Kilogram?
  • gleem
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3
Public Outreach: How Do Physicists Like Brian Greene & Sean Carroll Do It?
  • grand_unifier
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Graduate Derive a flow rate equation that accounts for the fluid properties?
  • brupenney
  • · Replies 1 ·
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Graduate Steady state Vertical diffusion equation
  • Juliousceasor
  • · Replies 1 ·
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High School Coal and total CO2 emissions in the UK
  • mfb
  • · Replies 20 ·
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Undergrad Help with Capillary Rise Equation for Differential Equations Class
  • RagincajunLA
  • · Replies 1 ·
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Graduate Exploring Poiseuille's Law: Pressure, Flow, and Resistance in Blood Vessels
  • sameeralord
  • · Replies 1 ·
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1
Undergrad The Graser: Examining a Cold War Spy Story
  • sophiecentaur
  • · Replies 14 ·
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14
Undergrad Stuck tray in the sink - How to separate
  • aisha072
  • · Replies 7 ·
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7
High School Why Does the Effective Period of a Composite Wave Remain Constant?
  • roam
  • · Replies 50 ·
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Undergrad Did bottles of wine truly get recovered from the wreck of the Titanic?
  • willym
  • · Replies 27 ·
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27
Undergrad How to find the H index of an author using Google Scholar?
  • windy miller
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4
Graduate What is the Effect of Influx and Efflux in Reynolds Transport Theorem?
  • hanson
  • · Replies 1 ·
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Undergrad Can Raman spectroscopy identify every substance?
  • David lopez
  • · Replies 4 ·
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4
Getting Physics Lectures on an iPod
  • _Mayday_
  • · Replies 2 ·
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2
Graduate Definition of Separable & Rules for Physical Systems: 65 Characters
  • Q_Goest
  • · Replies 6 ·
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6
Undergrad Redefining the Mass Unit: Counting Particles for Precision
  • A. Neumaier
  • · Replies 6 ·
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6
Undergrad What Happens When You Play with a 3 Dollar Diffraction Grating?
  • Drakkith
  • · Replies 5 ·
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5
Undergrad Understanding q: Lambda & S in the Equation
  • velfr
  • · Replies 3 ·
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3
Undergrad Understanding the Relationship Between Mass and Matter
  • alkaspeltzar
  • · Replies 7 ·
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7
Undergrad How Does Reducing Time Intervals Affect Accuracy in Numerical Integration?
  • walking
  • · Replies 5 ·
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5
Undergrad The Shadow Of An Atom - False Colour Images Reveal Structure
  • dt101
  • · Replies 11 ·
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Graduate Research styles in different branches of Physics
  • plasmon
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Graduate A new kind of radio transient: ERBs, by Ali Frolop et al.
  • Garth
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High School Questions Regarding the Fundamental Rules of Error Analysis
  • JC2000
  • · Replies 10 ·
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Undergrad Symmetry of an exponential result from a Fourier transform
  • Gama
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Undergrad How to remove Ethanol from Gasoline?
  • gary350
  • · Replies 27 ·
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News How Did Nobel Laureate David Thouless Impact Physics?
  • Mastermind01
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Undergrad Ionosphere: Causes of Electron Production & Recombination Reaction
  • Nusc
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High School History of the term "square-cube law?"
  • The Bill
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High School Is Cymatics a Scientifically Valid Phenomenon?
  • sebwild
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March 14 coming (Einstein, Hawking, Pi-Day)
  • robphy
  • · Replies 17 ·
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Undergrad Why Does Subtractive Cancellation Affect Measurement Precision?
  • Roger Dodger
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Graduate How we can explain our process of thinking by physics?
  • dip das
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High School Defining a Vernier Caliper when a reading is already showing....
  • nineteen
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4
High School How Can I Measure Lumen, Efficiency, and Color Temperature of a Street Lamp?
  • Lisun
  • · Replies 3 ·
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High School What Are the Dimensions of kWh?
  • nineteen
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Undergrad Analytical Open Channel Rectangular Fluid Flow
  • blizzardof96
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High School What Happens to Volume Change Ratio in Caesium When Pressure Exceeds 1.6 GPa?
  • Fitz Watson
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High School Phases of Matter: Solid, Liquid, Gas & More
  • Demirci Kawa
  • · Replies 19 ·
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High School Time reversion (pop science show)
  • benorin
  • · Replies 1 ·
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High School Number Precision When Adding/Subtracting
  • Raschedian
  • · Replies 8 ·
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Photo Contest - Magnetism (3/2-3/8)
  • ZapperZ
  • · Replies 31 ·
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High School Why is the height of a liquid not affected by the radius of a U-Shaped tube
  • AmirWG
  • · Replies 16 ·
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CERN's Next Mega Collider - A live event from the RI
  • Wrichik Basu
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Undergrad Who Was Wolfgang Rindler and What Was His Impact on Cosmology?
  • George Jones
  • · Replies 3 ·
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3
Undergrad Why did my bicycle speed increase on smooth pavement while coasting downhill?
  • Tom Kunich
  • · Replies 19 ·
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19
Graduate David Kaplan lecture on Particles and the Nature of Nothing
  • DennisN
  • · Replies 1 ·
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1
Graduate Importance of uncertainty and probability in research papers
  • Zack K
  • · Replies 3 ·
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3
High School What a Shame we can't cite from popular sources
  • .Scott
  • · Replies 8 ·
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8
Name of a scientist who introduced many words into English?
  • fluidistic
  • · Replies 13 ·
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High School Irradiance: difference between distance and the square of the distance?
  • otterandseal1
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16
Undergrad How to change the color of an LED?
  • Jackie1
  • · Replies 36 ·
2
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News What do theoretical physicists do?
  • George Keeling
  • · Replies 8 ·
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Undergrad Pixels Per Inch Calculation Paradox?
  • aneikei
  • · Replies 14 ·
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14
High School What does the symbol ± mean in scientific measurements?
  • Kendo
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5
Undergrad Can anything be measured with a single measurement?
  • Jeff Root
  • · Replies 26 ·
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Undergrad What is the opposite of light in the balance of nature?
  • pinestone
  • · Replies 36 ·
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Undergrad Papers with fewer authors are more disruptive
  • gleem
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High School Mastering Equation Solving: m(dv/dt)=mg-bvn | Step-by-Step Guide
  • Opressor
  • · Replies 4 ·
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Undergrad Indirect Airflow for Safe Extraction of Hydrogen from Lead-Acid Battery Room
  • somephy
  • · Replies 4 ·
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Do you think Tau Ceti e is inhabited?
  • alberto91
  • · Replies 1 ·
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What Type of Physics is Mentioned in This Italian TV Series?
  • Adam197
  • · Replies 10 ·
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High School Why does time only move forward and not backwards?
  • Tech2025
  • · Replies 33 ·
2
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Undergrad Trying to better understand what viscosity really is
  • caltrop
  • · Replies 9 ·
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9
Undergrad What does Fermat's principle of least time mean for causality
  • fando1234
  • · Replies 6 ·
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High School Recreation of Famous Japanese Rogue Wave
  • jedishrfu
  • · Replies 41 ·
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High School Solid angle by placing one disk on a cylinder
  • Shams
  • · Replies 1 ·
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High School Quartz vs. Glass -- why do they have different melting points?
  • Edge5
  • · Replies 4 ·
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Undergrad Tipler/Mosca significant figures
  • walking
  • · Replies 3 ·
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3
Graduate Naturalness: dimensionless ratios
  • Auto-Didact
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High School Is this mark scheme correct, poorly worded, or wrong?
  • Elbow_Patches
  • · Replies 18 ·
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News RIP Roy Glauber - 2006 Nobel Laureate in Physics
  • TeethWhitener
  • · Replies 2 ·
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2
Graduate Acceptable Atmosphere for CZ/Float-zone Refining
  • Patrick Underwood
  • · Replies 1 ·
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High School Are trigonometric ratios physical quantities?
  • Suyogya
  • · Replies 3 ·
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India scientists dismiss Einstein theories
  • phinds
  • · Replies 7 ·
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