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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 are some recommended intuitive physics books for self-study?
  • medwatt
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High School Why are ice cubes grey in the middle?
  • bobsmith76
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High School What's wrong with this wind turbine concept?
  • FermatPell
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Undergrad Why do we use Radian measurement for Time?
  • physicsdreams
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High School Recommend some great physics books?
  • Kerse
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Undergrad Is Michelson Describing Earth Tides or Ocean Tides?
  • cragar
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High School Understanding the Gravitational Constant Formula | Jamie
  • lxXTaCoXxl
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What has been the greatest discovery in physics in the last 25 years?
  • Helicobacter
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Undergrad Understand Complex Numbers: Learn How They Make Life Simpler
  • likephysics
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Undergrad Try to make a vapor fuel supply system
  • Qaiphyx
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Undergrad Solving DFT of f(n*t) vs t Data Array in C
  • souhal.67
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Picture of the 2 lines on a platinum iridium bar
  • fizagic
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Could CDs (Compact Disc) cause fire if I hang them outside the windows?
  • ahkow
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Undergrad A question about significant digits of digits in parentheses at the end
  • swampwiz
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Undergrad Don't understand the taylor expansion?
  • Lengalicious
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Graduate Measuring Chaos: Is There a Parameter for Chaotic-ness?
  • paultsui
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Undergrad Signal integration over ns time period
  • MAAB
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Undergrad Geometry, logic and sun angles: help
  • TaniaB
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Graduate What is the current understanding of matter and its origins?
  • Alex_Sanders
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High School Struggling to Refresh My Physics Knowledge: Any Helpful Resources?
  • Pepys
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Undergrad Where to publish physics papers for non-physicists?
  • waterfall
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Graduate Picking an appropriate distribution
  • aaaa202
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High School Need help in understanding phase angle/difference in A level physics.
  • mutineer123
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What is the biggest most fundamental question in all of physics?
  • jadrian
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Undergrad The forces do I have this right?
  • maximiliano
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Difficult situation in auto repair needs ideas
  • jonaq
  • · Replies 1 ·
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High School A scenario in which a planet's gravity pulls away from center of mass
  • modus
  • · Replies 12 ·
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Undergrad Gravitational field from earth/ center of mass
  • Excalibur1152
  • · Replies 1 ·
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High School Books To Inspire a Beginnig Physics Student
  • BrandonNajera
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Graduate The shock required to detonate C4
  • fawk3s
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High School What are the physics behind the internet?
  • Kroose65
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Undergrad Most interesting WEB pages on physics
  • Barnak
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Graduate Was the faster-than-light neutrino result a mistake caused by a loose cable?
  • humanino
  • · Replies 16 ·
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Undergrad Linear wave equation vs. linear system
  • huangchao
  • · Replies 1 ·
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High School Seismic Prospecting: What is It? Find Info Here
  • lcp1992
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High School Can we hover and wait for the destination to arrive?
  • helmi
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Undergrad Why does long wavelength mean more energy OR less energy
  • SteveinLondon
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  • Poll Poll
High School Electricity Poll: which way were you taught?
  • zoobyshoe
  • · Replies 56 ·
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Undergrad What Are the Laws of Nature and How Do They Explain Similarities Among Entities?
  • scienceHelp
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Undergrad Should I Learn Calculus Before Teaching Myself First Year Physics?
  • fellupahill
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High School Ice Floats: Understanding the Law of Flotation
  • anigeo
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Physicist alive today who you believe deserve a nobel prize
  • xdrgnh
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High School Why do people think physics is so hard?
  • Blahness
  • · Replies 112 ·
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Understanding the Damaged Back of an Old Record/TV Console
  • 3sisters28
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Graduate Can Lorentzian Relativity Unify Quantum Mechanics and Einsteinian Relativity?
  • mangaroosh
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High School Least Count of a Vernier Calliper
  • Ashu2912
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Undergrad Mass defines energy which defines mass
  • guss
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High School Why do people wear black in the desert?
  • kjamha
  • · Replies 25 ·
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Did This Short Film Break the Laws of Physics?
  • samgoodburn
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Undergrad Hello, i found a patent in the internet where a device is
  • lost_in_space
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Graduate What's the Term for Spinning an Olive in a Glass Without Touching It?
  • Physics whizz
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Undergrad What are the chemical reaction happen indise lamp in tungsten
  • kimdesug
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High School What is the number of significant digits in a integer with trailing 0's ?
  • swampwiz
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High School What Is Delta Δ and Why Do We Use It?
  • -Physician
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Undergrad What is the precise definition of a year?
  • swampwiz
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Graduate The science behind the so called Philadelphia Experiment ?
  • fellupahill
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Undergrad Anatomy of Fat man: implosion-critical bomb
  • protagoras
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Undergrad Help a BioPhysics Student with Examples for Quiz
  • Dr.House0
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Graduate Are there any new states of matter yet?
  • questionpost
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High School Can you manipulate any formula in Physics?
  • michellemw
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Undergrad What does negative resistivity mean
  • kahwawashay1
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Undergrad What is the Partial Derivation Question in Mary Boas's Book?
  • knockout_artist
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Graduate What Are Perturbations and How Do They Affect Cellular Aging Models?
  • zezima1
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Looking for Physics Enthusiasts? Join Me!
  • kamel_7
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High School Here is an excerpt i found on the web. Ernest Rutherford, born on
  • LT72884
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Graduate Are there any books describing only experiments?
  • Xilor
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Physics Docs: Recommendations on Cosmology, Astronomy & Theory
  • grays0n
  • · Replies 26 ·
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Undergrad What are the key differences between linear and non-linear waves?
  • quid
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High School What Is the Opposite of Dense?
  • Nanako
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Undergrad How does density affect pressure in longitudinal waves?
  • rishch
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Graduate Cnoidal Waves vs Solitons: Understanding the Differences
  • quid
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Can someone explain why this works?
  • Ms Music
  • · Replies 32 ·
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Undergrad Help Guide my Fundamental Understanding, getting to the core
  • GeekPioneer
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Undergrad Why No Noise is Added to Sound Travel Through a Wall?
  • arashmh
  • · Replies 11 ·
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What's a funny physics invention for making a charlie chaplin film?
  • iankasai
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Graduate Radial Breathing Mode for hollow cylinder - formula needed
  • GenSoft3d
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Undergrad What is the g-force of a car stopping on a dime?
  • Loren Booda
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High School Why is sound different in lower temperatures
  • CatinRzeszow
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High School Different between Wandarama and Fun Fly Stick?
  • oem7110
  • · Replies 11 ·
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Undergrad What are the fundamental physical units of measure ?
  • Islam Hassan
  • · Replies 22 ·
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What Letter is the Circled One? - Bob
  • bobfei
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High School Home applications that use a solenoid?
  • raja723578
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Undergrad How Does Air Pressure Behave in Vibrating Wind Instruments?
  • TheLil'Turkey
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Undergrad What hidden gems can be found on archive.org for physics enthusiasts?
  • jjustinn
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High School How Does Resonance Occur with Wavelength and Layer Thickness?
  • civil86
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Undergrad Can You Ionize Hydrogen in This New Shoot the Electron Game?
  • edguy99
  • · Replies 6 ·
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High School Can two things happen at EXACTLY the same time?
  • michael98
  • · Replies 5 ·
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Graduate Why is my N-Body Simulation in Matlab Showing Errors?
  • Einstein2nd
  • · Replies 3 ·
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Graduate How Do Garrett Lisi's Theories Challenge Current Physics Paradigms?
  • fellupahill
  • · Replies 3 ·
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Undergrad Understanding Error Bars on Least Squares Fit Line
  • radiator
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Undergrad How Do I Combine Measurement Uncertainties?
  • lavster
  • · Replies 1 ·
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High School Mysteries of the Bright Red Cloudy Sky
  • Edgardo
  • · Replies 13 ·
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Why are the most famous scientists physicists and not mathematicians?
  • alexmahone
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High School Why is 4 ∏ in so many physics formulas?
  • tucanaz
  • · Replies 3 ·
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Undergrad Sanity check for earth launched moon pod
  • sammorgan101
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Graduate Special Cases for Gravity Force Inside Solid Objects
  • dougettinger
  • · Replies 1 ·
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Undergrad DUARS Satellite Re-Entry: Impressive Light Show & Potential Debris Threat
  • Evo
  • · Replies 233 ·
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Undergrad Distance of the moon, accoring to Ptolemy
  • Front Office
  • · Replies 1 ·
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A Revolutionary Invention: The "Owie Stick
  • microfracture
  • · Replies 8 ·
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Are there any formulae that involve decibels?
  • Ralphonsicus
  • · Replies 8 ·
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