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.
Threads
Undergrad Why does 'breaking' not occur in liquids and gases?
- Prannu
- · Replies 5 ·
Meet a Mentor: Doc Al | PF Insights
- Greg Bernhardt
- · Replies 16 ·
Undergrad Variation of Density with Elevation
- cruckshank
- · Replies 4 ·
Graduate PET Imaging Resolution: Lower E(max) for Superior Image Resolution
- BobP
- · Replies 4 ·
Undergrad 'Physics' Terms for Integral quantities?
- greswd
- · Replies 9 ·
High School What Are Some Engaging Physics Club Activities for Sixth Form Students?
- Physicsphysics
- · Replies 7 ·
Undergrad What is the Yield Strength vs Temperature Relationship for 4130 Steel?
- Physics_Kid
- · Replies 1 ·
Undergrad Why doesn't a fluorescent lamp implode and shatter ?
- Hurricane939
- · Replies 3 ·
Undergrad What are the physics of pole vaulting
- Nick tringali
- · Replies 4 ·
Undergrad Are all physics theories ultimately approximations?
- UchihaClan13
- · Replies 11 ·
Undergrad Distance from source to observe Doppler effect?
- TheCanadian
- · Replies 5 ·
High School Why pepper dust sticks to glass only where there's no print
- Camille
- · Replies 5 ·
High School Is the Earth Flat? Rapper vs. Astrophysicist Battle on SoundCloud
- houlahound
- · Replies 3 ·
High School Why do shower curtains blow inwards?
- alw34
- · Replies 26 ·
High School What is the definition of phase lag and phase difference?
- ajaysabarish
- · Replies 3 ·
Insights Rainbows are not Vampires - Comments
- anorlunda
- · Replies 88 ·
Graduate Non-linear properties in linear systems
- Charles Link
- · Replies 5 ·
Have You Seen the Physics Demo of a Physicist Tied to the Side of a Building?
- ZapperZ
- · Replies 6 ·
Undergrad What is the conversion factor for hydraulic conductivity units?
- Ashan_ok
- · Replies 1 ·
Graduate Interpreting complex capacitance and conductivity from a broadband dielectric spectrometer
- thebluser
- · Replies 1 ·
Millennial Could be Next Einstein: Nima Pasterski
- Greg Bernhardt
- · Replies 18 ·
Where can I buy Dr. Michio Kaku's Sci Fi Science DVDs?
- brainydoctor
- · Replies 2 ·
Graduate Ramjet/Scramjet Propulsion on a Vertical Rocket?
- onion3000
- · Replies 1 ·
High School Difference between direction and dimension
- Physical activity
- · Replies 7 ·
Undergrad Transverse and longitudinal waves
- smart_worker
- · Replies 6 ·
High School Why does a snowflake have six sides?
- barryj
- · Replies 6 ·
High School How do I estimate how tall this building is?
- Henrybar
- · Replies 6 ·
Undergrad Examples of units with non-integer exponents
- Chetlin
- · Replies 2 ·
Undergrad Ambiguity in dimensional analysis
- DaTario
- · Replies 17 ·
Let's use comics to answer some questions
- jim mcnamara
- · Replies 2 ·
Undergrad Finding body density from buoyancy in oil and water
- Poquinha
- · Replies 9 ·
Undergrad "The Portal problem" (Classical Mechanics solution)
- AlbertCG93
- · Replies 10 ·
What's this website about? ("nucleus layered view")
- hddd123456789
- · Replies 3 ·
Graduate What is the Superposition of Wave Functions in the US?
- davenn
- · Replies 3 ·
Undergrad Translation of handwriting into readable form
- coolul007
- · Replies 7 ·
What's your dominant learning style?
- Sophia
- · Replies 25 ·
High School Why does the rainbow have seven named colors if infinite combinations exist?
- Likith D
- · Replies 6 ·
High School Is the Journal of Atmospheric and Solar-Terrestrial Physics credible?
- houlahound
- · Replies 12 ·
High School What is the Meaning of Harmonic Content in Sound Waves?
- toesockshoe
- · Replies 1 ·
High School States of Matter That Aren't Fluids
- ScientificMind
- · Replies 5 ·
Undergrad Do sound waves have modes like vibrating strings do?
- toesockshoe
- · Replies 6 ·
High School Why don't vibrations below 20 Hz produce audible sound?
- toesockshoe
- · Replies 8 ·
High School How does a vacuum pump push gas out of a container?
- Intle
- · Replies 3 ·
Undergrad What research questions can wind flow simulations around Mount St Helens answer?
- Earthland
- · Replies 2 ·
Graduate Meaning of "equatorial radius in an orbital plane"
- M.T
- · Replies 3 ·
High School Why is Pi so occurring in physics
- jamalkoiyess
- · Replies 2 ·
High School Best popular physics and math books from 2014-2015
- RJ Emery
- · Replies 6 ·
Graduate Drum Resonance Physics: Understanding How Tunings Affect Frequency
- jp1390
- · Replies 1 ·
Undergrad Why Does My Calculated Molar Mass of Arsenic Differ from the Standard Value?
- phy9
- · Replies 3 ·
Insights Think You Know about the LHC? - Comments
- Greg Bernhardt
- · Replies 26 ·
High School Vibrations of a Violin (Physics)?
- bobbyboy
- · Replies 2 ·
High School Understanding Mainstream Physics
- Gjmdp
- · Replies 4 ·
High School Wind turbines turning in no wind?
- Kuzey Cem
- · Replies 1 ·
High School Why is there a hole in airplane windows?
- Happiness
- · Replies 6 ·
High School Why do physics majors have high IQs
- potato123
- · Replies 45 ·
Undergrad Designing an RC plane to fly on Mars with 50kPa atmosphere
- Batmoosemike
- · Replies 18 ·
Graduate Statistics and Data Science applied to Physics
- StatGuy2000
- · Replies 5 ·
Graduate Elite scientists can hold back science
- Ovolo
- · Replies 6 ·
High School Why does breathing out have more effect on surroundings?
- Sharkingboy8
- · Replies 13 ·
Name of The inventor of the first rocket?
- KineticFever
- · Replies 3 ·
High School Why is Specific Gravity Important?
- imsmooth
- · Replies 2 ·
Femto Photography: Capturing the Unseen World
- jobyts
- · Replies 3 ·
Greatest physics discovery in the past two years
- Pual Black
- · Replies 22 ·
Graduate Material Inflation: Analysis of Intermolecular Forces
- vin300
- · Replies 6 ·
Undergrad Identify this piece of equipment?
- NatFex
- · Replies 4 ·
High School Do Paper Contracts When Burnt?
- ajayraho
- · Replies 5 ·
Graduate Dealiasing in 2D: How to Effectively Use the 2/3 Padding Rule
- jollage
- · Replies 1 ·
Undergrad Is there a good book on only observational evidence
- toastercombo
- · Replies 5 ·
Advice: what to do with the SPS chapter?
- jack476
- · Replies 6 ·
Graduate Fluorescence Spectroscopy and Stokes Shift
- RYANDTRAVERS
- · Replies 1 ·
Graduate Deduction of the equation of frequencies of a piano
- Bruno Tolentino
- · Replies 2 ·
High School Detect Window/Door opening closing using sensors
- rushi121
- · Replies 23 ·
Graduate Piano string vibration decay and harmonic amplitude relationships
- Bruno Tolentino
- · Replies 2 ·
High School Wind Turbine Effectiveness Project
- Max Pridgen
- · Replies 4 ·
High School What is the purpose of the term 'Matter'?
- Aerion
- · Replies 3 ·
High School What is the meaning of the term 'object'?
- Aerion
- · Replies 3 ·
High School What are photographic plates and why are they used in radioactivity experiments?
- 123kid
- · Replies 7 ·
High School Trouble Remembering Physics Equation with x + 5 = y + 2 and x + 3 = y
- Davi da Silva
- · Replies 11 ·
High School Preserving information/an object for a couple of billion years
- Dispalor
- · Replies 20 ·
Undergrad Static Cling - why is its effect permanent ?
- ramonegumpert
- · Replies 3 ·
Graduate Four waves formalism by Landau and Lifshitz
- sounouhid
- · Replies 4 ·
Graduate Physicists should take pride in their work
- klotza
- · Replies 8 ·
Undergrad What Are Some Major Research Facilities Like CERN in the US and Europe?
- JeremyG
- · Replies 5 ·
High School Can glass really break into tiny harmful dust particles?
- glassbreaker123
- · Replies 2 ·
Undergrad What kind of physics is involved in computer production?
- cmkluza
- · Replies 4 ·
Graduate Can a perfect circle touch a flat surface at only one point?
- Shropcakes
- · Replies 11 ·
Did Lord Kelvin Say "If You Can't Measure It, It Isn't Real!"?
- klimatos
- · Replies 1 ·
High School Any Interesting Problems I could try to solve?
- UncertaintyAjay
- · Replies 9 ·
Graduate Thermionic Emission Effects on Surfaces
- 123kid
- · Replies 2 ·
High School Does a Gravity of a planet determine density?
- Living Tribunal
- · Replies 6 ·
How is Michio Kaku regarded in the Physics world?
- Jamin2112
- · Replies 120 ·
How near we are to make a Real Iron Man's Arc Reactor?
- Aero_Arnendu
- · Replies 3 ·
Undergrad Could floating cities become a reality using rocket boosters?
- SteveManPhy076
- · Replies 1 ·
Undergrad Why Does Wave Energy Depend on Frequency and Not Wavelength?
- VVS
- · Replies 1 ·
High School Mother of a grade 12 physics student
- angryzeena
- · Replies 8 ·
Undergrad If air is a mixture, why don't the gases separate?
- AMan24
- · Replies 48 ·
Graduate Does this wave propagation problem make physical sense?
- hoomanya
- · Replies 6 ·
Undergrad Solving Uncertainty in Lab Report Calculation
- AstroKeith
- · Replies 1 ·
Undergrad Unusual Math Formulas on Blackboard: Understanding Pi and Lambda
- motleycat
- · Replies 2 ·
High School Finding Uncertainty Using Upper/Lower Bound
- AstroKeith
- · Replies 2 ·