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
The original definition of a mile
- chronon
- · Replies 10 ·
Undergrad Electric guitar amp speaker rounding
- Artman
- · Replies 12 ·
Undergrad Corner reflector: ray reflected parallel to incidence
- shaiqbashir
- · Replies 3 ·
Undergrad What is Liouville's theorem?
- Pr0x1mo
- · Replies 5 ·
World Year of Physics 2005 Talent Search
- ZapperZ
- · Replies 2 ·
High School It's simple, but i don't know it happens
- orlandu
- · Replies 2 ·
High School Is Corrosion to Blame for Leaked Pepsi in Unopened Can?
- Speed
- · Replies 8 ·
C4 is a very versitile explosive
- Arsonade
- · Replies 5 ·
High School Instrument to measure ship motion and stability
- trubey
- · Replies 6 ·
High School How do u convert eV to joules again?
- nemzy
- · Replies 24 ·
Undergrad Why do bedouins wear black robes?
- ffthink
- · Replies 2 ·
Graduate Is Energy the Curvature of Spacetime?
- Crosson
- · Replies 12 ·
Undergrad Would faster-than-light motion create a gravitational boom?
- bjon-07
- · Replies 4 ·
Undergrad Solve Interesting Problems at Home - Post-Undergrad Physics
- greatscott
- · Replies 5 ·
Undergrad What are condition postulates?
- mustaffarel
- · Replies 4 ·
High School Simple qn on vectors and scalars
- gunblaze
- · Replies 12 ·
Best physics software for simulations and calculations
- relativitydude
- · Replies 16 ·
Undergrad How Much Space Material is Needed to Alter Earth's Gravity?
- mapper
- · Replies 1 ·
Undergrad German words used in English physics and mathematics
- Edgardo
- · Replies 24 ·
Undergrad Using terminal velocity to find fluid viscosity
- tntcoder
- · Replies 1 ·
Undergrad What does it mean to say object A is 10 times larger than object B?
- PhilipF
- · Replies 15 ·
High School Why do large objects rise to the top when shaken in granular material?
- billy_boy_999
- · Replies 8 ·
Where Did I Find Gokul Last Night? A Physics Forum Search Adventure
- tribdog
- · Replies 7 ·
Graduate What is the Scientific Explanation for Spontaneous Human Combustion?
- Kakarot
- · Replies 25 ·
News Is physics becoming too expensive?
- Aquamarine
- · Replies 9 ·
Undergrad Selecting metals for different purposes based on reactivity
- aek
- · Replies 4 ·
Graduate InterestingAnti Grav device read.
- mapper
- · Replies 2 ·
Graduate The Final Theory: Rethinking our Scientific Legacy
- mapper
- · Replies 4 ·
Graduate Can physics explain the existence of physics?
- quantumcarl
- · Replies 35 ·
Graduate Imposing boundary conditions on a string
- painfive
- · Replies 9 ·
What is Your Favourite Experiment in Physics?
- Edgardo
- · Replies 5 ·
What are some films about physics and mathematics?
- Edgardo
- · Replies 1 ·
Graduate Is time a fundamental factor in the universe?
- Tal D. Noble
- · Replies 23 ·
Graduate Is Mysticism Necessary for Advancing Modern Physics?
- JohnBarchak
- · Replies 56 ·
Undergrad What Is the Definition of Degrees of Liberty in a System?
- quasar987
- · Replies 7 ·
Physics Napster resource links and information
- quantumdude
- · Replies 41 ·
Graduate Flaw in Einstein's lamp-in-box derivation of E=mc²
- cen2y
- · Replies 6 ·
Physics is the most broad and respected science?
- stjimmy
- · Replies 46 ·
Graduate Scale Invariance in Global Terrorism
- selfAdjoint
- · Replies 3 ·
Graduate Is Einstein's Theory of Relativity Truly Incorrect According to New TOE?
- cepheid
- · Replies 6 ·
Graduate Can humans be scientificly expressed?
- eNathan
- · Replies 11 ·
New method of propulsion, or simple BS?
- wasteofo2
- · Replies 2 ·
Graduate Does the use of complex numbers in equations imply a relationship to time?
- Rothiemurchus
- · Replies 7 ·
High School Why Do Mountain Roads Wind Instead of Going Straight Up?
- Reshma
- · Replies 11 ·
Graduate Is Time Travel Possible Through Advanced Particle Rearrangement?
- Kimorto
- · Replies 11 ·
Undergrad Balancing a Stick on Its End: Will Bottom Leave First?
- ceptimus
- · Replies 19 ·
Graduate Deconvolution - signal processing
- Gonzolo
- · Replies 10 ·
Graduate Why is air colorless even though nitrogen and carbon dioxide are white gases?
- Gokul43201
- · Replies 35 ·
High School What size object can a radar detect?
- podpod
- · Replies 4 ·
Why does my picture have that quality?
- Tom McCurdy
- · Replies 12 ·
Undergrad Why did the Enola Gay crew taste lead from radiation?
- Ivan Seeking
- · Replies 7 ·
Undergrad Show that the equation is homogeneous
- Gughanath
- · Replies 4 ·
Mirror reflection at the speed of light
- iodmys
- · Replies 23 ·
Is Gravity Our Ally or Our Enemy?
- ConcealedDreamer
- · Replies 65 ·
High School How do I create a histogram with average and standard deviation in Excel?
- maverick99
- · Replies 11 ·
High School Why Do CRTs and LCDs Commonly Use a 4:3 Aspect Ratio?
- karthik3k
- · Replies 1 ·
High School What causes sound waves, glass breaking, pendulum clocks and beats?
- nemzy
- · Replies 1 ·
Undergrad Physical quantities and definitions
- C0nfused
- · Replies 4 ·
Undergrad How TV science channels present outdated theories as current
- Ivan Seeking
- · Replies 13 ·
Graduate How high to fall straight down and reach Mach 25 on Earth
- DaveC426913
- · Replies 3 ·
High School Which Travels Fastest: Sea Wave, Mercury Wave, or Moon Wave?
- Crumbles
- · Replies 4 ·
High School Why do air bubbles form in ice cubes even with distilled water?
- Hooleehootoo
- · Replies 24 ·
What is the Grand Canyon Star Party 2005?
- Astronuc
- · Replies 22 ·
High School Does material weight change after a vacuum process?
- vmedina21
- · Replies 4 ·
Undergrad What happens to the remainder of the energy
- brendan_foo
- · Replies 3 ·
What makes Gokul a beloved physicist and inspiration to others?
- jcsd
- · Replies 46 ·
Undergrad Cold fusion controversy
- Ivan Seeking
- · Replies 7 ·
High School Question on Walking: Does Changing Speed Affect Overall Speed?
- Choralone
- · Replies 2 ·
High School I am completely drawing a blank Exam tomorrow, help?
- Apodidomai
- · Replies 2 ·
High School When does Hooke's law break down?
- nemzy
- · Replies 1 ·
High School Science and history trivia quiz with 15 questions
- Evo
- · Replies 93 ·
High School Where Can I Learn About the Physics of Musical Instruments?
- physicsisphirst
- · Replies 6 ·
High School Can Pure Water Conduct Electricity? Why?
- imran
- · Replies 2 ·
UP's Singularity Podcast: Physics Discussions
- MrCaN
- · Replies 3 ·
Graduate Why did it take 7 hours for the tsunami to reach Africa?
- lalbatros
- · Replies 11 ·
Graduate Observation in quantum mechanics has nothing to do with consciousness
- Tiberius
- · Replies 221 ·
High School How do fires start in ovens if paper ignites at 451°F but ovens run at 350°F?
- T@P
- · Replies 24 ·
High School Why Does Doubling Mass Mean Twice as Much Force?
- Cheman
- · Replies 25 ·
How does the Levitron levitate a top?
- tribdog
- · Replies 11 ·
High School Read in the Da Vinci Code that phi = 1.68
- jai6638
- · Replies 12 ·
High School What Happens to a Helium Balloon and Objects During Sudden Braking?
- vikasj007
- · Replies 8 ·
Graduate How do you explain the colors of elements with the free electron model?
- JohanL
- · Replies 2 ·
High School How does the notch test measure fracture energy in materials?
- richnfg
- · Replies 8 ·
High School Any High School-Level Activities for Video Feedback and Chaos Theory?
- Esnas
- · Replies 2 ·
High School What Is the Energy in a Wave and How Does It Change with Different Openings?
- T@P
- · Replies 1 ·
Where can I find Einstein's papers?
- QuantumDefect
- · Replies 2 ·
Undergrad Physics analysis of Santa delivering presents on Christmas Eve
- Ryan H
- · Replies 3 ·
Graduate What are the flaws in Thornhill's argument against Einstein's theories?
- derekmohammed
- · Replies 2 ·
High School What does surface of Earth mean for gravitational acceleration?
- PhysKid24
- · Replies 1 ·
High School Physics Goes in Search of 'Cool' - Einstein Year Launch
- mattmns
- · Replies 15 ·
Graduate Are Tornadoes and Ball Lightning Examples of Plasmoid Phenomena?
- Ivan Seeking
- · Replies 9 ·
Graduate Best wishes for The World Year of Physics 2005
- chaoszen
- · Replies 4 ·
Michio Kaku science chat at Physics Forums Monday-Wednesday 9PM EST
- Greg Bernhardt
- · Replies 26 ·
Graduate Is G's Value Changing? Investigate the Controversy!
- TheAntiRelative
- · Replies 5 ·
Graduate Self relative light speed is infinite
- DJmaux
- · Replies 16 ·
High School How do movie cameras use persistence of vision to create smooth motion?
- DeathKnight
- · Replies 4 ·
Graduate Is Gravity Leaking Into Other Dimensions?
- phillip2810
- · Replies 6 ·
High School Tsunami caused by the earthquake.
- MatSci
- · Replies 6 ·
Graduate How does the Earth's rotation affect time and weight at different latitudes?
- RandallB
- · Replies 7 ·
Graduate Law of excluded middle and quantum logic in Hilbert spaces
- Kea
- · Replies 6 ·