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
Where Can Students Find Free Science and Math Textbooks Online?
- JazzFusion
- · Replies 3 ·
High School Why is black better than white for sun protection?
- physicsforlife
- · Replies 11 ·
Undergrad Can you measure time objectively without circular reasoning?
- Bojan Keevill
- · Replies 12 ·
High School General Energy ? - prob easy to answer
- CuriousJulia
- · Replies 4 ·
Sixty Symbols [The Greatest YouTube Channel Ever]
- Monocerotis
- · Replies 6 ·
Make a Glass Bottle Creation at Home
- jordan101
- · Replies 8 ·
High School Do birds use Newton's third law or Bernoulli's principle to fly?
- bobquantum
- · Replies 20 ·
High School What color is the sky on extra-solar planet?
- dsisk559
- · Replies 3 ·
Graduate How Can Tube Parameters Influence Fluid Drainage in Glaucoma Treatment?
- spal123
- · Replies 3 ·
High School What's the point of a histogram of baseline measurments?
- p3t3r1
- · Replies 4 ·
Graduate Derivative of Stochastic Function
- Apteronotus
- · Replies 3 ·
Undergrad What is the Young's Modulus for Plastics and How Can I Find an Accurate Value?
- mathsgeek
- · Replies 7 ·
Books About Emptiness: Popular Reads
- Pjpic
- · Replies 4 ·
High School Why Does the Pitch of an Emergency Siren Change as It Passes By?
- gttjohn
- · Replies 4 ·
Graduate Why is there such little talk regarding superdeterminism?
- Descartz2000
- · Replies 23 ·
High School Using lightbulbs to circulate the air in my room
- questionboy
- · Replies 9 ·
Welcome Rohan! Starting a Physics Career at 13
- Rohan11221
- · Replies 11 ·
High School How do crows and radio waves follow the great circle path?
- rajeshmarndi
- · Replies 9 ·
Who do you think can be the Physics Nobel Prize winer tomorrow?
- Osiris
- · Replies 16 ·
Graduate Famous argument against alien life
- jaxonbridge
- · Replies 32 ·
Say Hi to my Planetary Geophysicist niece
- Evo
- · Replies 8 ·
Graduate Q about phyiscs of Liposuction (and Sonolumensence)
- piareround
- · Replies 1 ·
High School Why Become a Physicist? - A High School Student's Curiosity
- Senjai
- · Replies 19 ·
High School How Many Significant Figures Does Physics Agree On?
- fs93
- · Replies 6 ·
Undergrad Why physics requires memorizing formulas but math relies on logic
- Mustapha13
- · Replies 15 ·
Are lay person questions annoying to professional scientists?
- Galteeth
- · Replies 30 ·
Undergrad How and why does everything in life reach equilibrium?
- sameeralord
- · Replies 8 ·
High School Drinking Water from the First Floor with a Long Straw
- jimlee4262
- · Replies 9 ·
Undergrad Uncertainty in Measurement (Question)
- BAnders1
- · Replies 1 ·
Undergrad Experimental Values vs. Theoretical Values
- DBJKIBA
- · Replies 3 ·
High School Is Energy Really Just a Force that Moves Objects?
- magpies
- · Replies 23 ·
High School Identifying Sounds: Apparatus Needed?
- callumbrad128
- · Replies 7 ·
Graduate Paper on Unified Theory of Superman's Powers
- Galteeth
- · Replies 3 ·
Looking for a physics forum that enforces scientific standards
- Virtuous
- · Replies 27 ·
High School Clarifying the Relationship between A and B
- Noxide
- · Replies 1 ·
Graduate Could physical laws be self-defining subsets of quantum chaos?
- ConradDJ
- · Replies 74 ·
High School Is molten iron a good conductor of electricity?
- jostpuur
- · Replies 1 ·
High School How to Determine Significant Figures in Multiplication/Division?
- parabolic1
- · Replies 3 ·
Undergrad Trying to find some rheostatic fluids
- GuitarDean
- · Replies 1 ·
High School Is the component of a vector still a vector?
- Red_CCF
- · Replies 1 ·
High School Physical meaning of multipication?
- MeChaState
- · Replies 21 ·
Undergrad Are Grain Dust Particles Explosive Due to Static Electricity?
- doc.madani
- · Replies 10 ·
Undergrad Can a vehicle maintain constant velocity without net external force?
- Vincit
- · Replies 13 ·
High School Meters to the -3rd Power: 5.1*10^-5m
- you_of_eh
- · Replies 3 ·
Undergrad Is v=f lamda true in every circumstance?
- ATPenergy
- · Replies 1 ·
High School Which Definition of Physical Quantity is Clearer and More Accurate?
- johncena
- · Replies 6 ·
What made you begin to love physics?
- Azael
- · Replies 23 ·
Who is your favorite scientist, and why ?
- Human4D
- · Replies 17 ·
High School Where Do the Atoms for a Fetus Come From?
- {MXC}michael
- · Replies 1 ·
High School Can anybody let me know in detail about time and its measurements.
- harshithelp
- · Replies 1 ·
Can Our Voices Really Be Stored in the Atmosphere?
- EngWiPy
- · Replies 13 ·
High School Giant Straw: Will Earth's Atmosphere be Sucked Out?
- johnandersoni
- · Replies 6 ·
Graduate Could Einstein's Revolutionary Ideas Be Published Today?
- Nereid
- · Replies 50 ·
Undergrad Coffee grains are hard to clean up
- Jame
- · Replies 1 ·
High School Why do coffee grounds fly out of the grinder?
- rsohmer
- · Replies 6 ·
Youtube - Great Science/PF Related Videos.
- Human4D
- · Replies 2 ·
High School What is a vacuum made of?
- Razael
- · Replies 11 ·
Undergrad Why is gravity considered fundamental and not a result of electromagnetism?
- 2keyla
- · Replies 25 ·
High School What are some specific examples of emergence?
- eranb2
- · Replies 6 ·
News Government a non-conservative force?
- Jasongreat
- · Replies 6 ·
Collection of free physics and mathematics video lectures
- pkrumins
- · Replies 21 ·
Undergrad The science of flying molten tungsten
- MathYew
- · Replies 8 ·
Undergrad Who Really Invented Television: Zworykin, Farnsworth, Tihanyi, or a Combination?
- vampyregirl
- · Replies 3 ·
Undergrad Could a 350 m/s gun with 26 cm barrel penetrate 4 cm into wood and push a 20 kg chair?
- fargoth
- · Replies 37 ·
High School How do I find the mass of a person from their weight?
- Joe436
- · Replies 22 ·
Undergrad Could a pneumatic bolt tool drill tree holes faster than an electric drill?
- Woodman
- · Replies 9 ·
High School Can Anti-Gravity Globes Work Upside Down?
- LSteel
- · Replies 11 ·
High School Studying Physics: Memorizing Formulas
- skitzz88
- · Replies 2 ·
Do different gas stations add their own additives to the same delivered fuel?
- colouredbleu
- · Replies 1 ·
Undergrad Why Are Lost Aircraft Difficult to Track Despite Satellite Technology?
- rajeshmarndi
- · Replies 7 ·
Graduate Lee Smolin on the nature of mathematics and time
- JoeDawg
- · Replies 5 ·
Undergrad Properties of Waves and how they relate to Music
- avocadogirl
- · Replies 6 ·
Undergrad Is the Resultant of Combining Unit Step Functions Still a Unit Step Function?
- veralika
- · Replies 4 ·
Undergrad Kirth, Kerth, Kurth (SP?) Phase?
- darkfall13
- · Replies 1 ·
High School What are Some Units I'm Studying in Grade XI Physics?
- XuryaX
- · Replies 2 ·
High School Why does aluminum foil block phone signals but not WiFi router signals?
- wwwincent
- · Replies 2 ·
Noisy Vacuum Cleaners: Is There Such a Thing as a Silent One?
- xunxine
- · Replies 3 ·
Did Feynman smoke cigarettes?
- collectedsoul
- · Replies 12 ·
High School Choosing a physics topic for high school independent research
- tasman2010
- · Replies 1 ·
Undergrad What range of frequencies can be generated by blood flow
- tarek1984
- · Replies 3 ·
Undergrad Can some one who understands gravity explain this?
- cannafield
- · Replies 55 ·
High School What is the worst electrical conductor among readily available metals?
- RestlessMind
- · Replies 24 ·
Undergrad Is there a type of liquid that is less dense than a type of gas?
- Mattius_
- · Replies 5 ·
Undergrad Why can't we always add quantities with the same dimensions?
- johncena
- · Replies 2 ·
Undergrad Solid angle or steradian for measuring
- monty37
- · Replies 8 ·
High School What Are the Best Grade 11 Physics Review Sites?
- duelinga
- · Replies 1 ·
High School How do I learn formula manipulation for higher physics?
- rodneyspoon
- · Replies 3 ·
High School Freshman physics lectures in English for Fundamentals of Physics textbook
- der4
- · Replies 1 ·
Undergrad Calculating Wave Velocity in a Stadium
- flatmaster
- · Replies 1 ·
Graduate Does anybody know who first derived this equation?
- 9smartcats
- · Replies 1 ·
Is Time Travel Discussion Allowed in Physics Forums?
- secocarmona
- · Replies 3 ·
Undergrad The Physics of Pneumatic Office Chairs and Soap Bottles
- wavingerwin
- · Replies 4 ·
High School If all of the polar ice caps melted
- gravenewworld
- · Replies 55 ·
Were gravitons observed at a university in June?
- SDutra
- · Replies 14 ·
Graduate Why do trailing zeros in 2000 vs 2025 suggest different significant figures?
- John Lee
- · Replies 5 ·
Open-source physics and math formula database
- calccrazy1dx
- · Replies 7 ·
Undergrad Were any 'breakthroughs' in particle physics
- bill nye scienceguy!
- · Replies 8 ·