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
High School What else can UV rays be used for?
- RICKYtan
- · Replies 8 ·
High School Can directed energy be used at low intensity to remove particles from surfaces?
- RICKYtan
- · Replies 13 ·
Undergrad Why spinning a penny favors tails over heads
- oz93666
- · Replies 8 ·
High School Critical volume problem: extra factor of 4 in sphere volume formula
- Buffu
- · Replies 12 ·
Undergrad Simple suction air filter: items and preventing implosion
- r19
- · Replies 2 ·
High School Is there a gas that is completely insoluble in any liquid?
- GabrieleCitossi
- · Replies 2 ·
Undergrad Checking a swing by sliding the bat through the grip
- Buzz Bloom
- · Replies 10 ·
Can you really say "making" electricity?
- BobBobinoff
- · Replies 27 ·
High School Is There a Physics Equivalent to Math-Atlas.org?
- Dragutin
- · Replies 8 ·
High School Why has the EM Drive fallen out of discussion here?
- rexregisanimi
- · Replies 2 ·
High School Time: Physical Existence or Perception? Current Opinions
- arupel
- · Replies 1 ·
High School How can I make an original cloud chamber?
- Gjmdp
- · Replies 3 ·
High School Scientific principle about major events
- Brr3188
- · Replies 7 ·
Undergrad Air flow from atmosphere into a tank
- JCB123
- · Replies 4 ·
Undergrad Applying physics to economics/finance
- rh2014
- · Replies 4 ·
High School Identifying an RF pulse sweeping across the spectrum at night
- houlahound
- · Replies 29 ·
Why Did My Bed Sheet Glow Green When Touched?
- Ngineer
- · Replies 7 ·
High School Building foundation in classical mechanics for electronics study
- UsableThought
- · Replies 16 ·
Undergrad Viscosity, two immicible phase flow, wettabilility
- Jabbar_B
- · Replies 6 ·
High School Why do RMS values change during rectification?
- Asad Raza
- · Replies 2 ·
Graduate Is the Fifth Force the Next Breakthrough in Physics?
- astro_chara
- · Replies 10 ·
High School What Are the Advantages of Single Stage Rockets Over Multi-Stage Rockets?
- Januz Johansen
- · Replies 4 ·
Photo Contest - Magnet (12/3-12/9)
- ZapperZ
- · Replies 7 ·
High School Rice University gets Newtons 3rd Law wrong
- bland
- · Replies 5 ·
Graduate Physics PhDs ending up in academia in non-physics fields
- StatGuy2000
- · Replies 3 ·
High School Is it always better to use multi stage rockets?
- Januz Johansen
- · Replies 9 ·
Graduate I am a Physicist looking for some credible answers
- James T Clemens
- · Replies 6 ·
Insights Real Research in Unexpected Places - Backyards, Barns, Bayous - Comments
- Dr. Courtney
- · Replies 2 ·
Graduate What is the world's lowest vacuum pressure achieved?
- dreens
- · Replies 7 ·
Undergrad Does vacuum sealing force water out of a saturated sponge?
- matthewj0717
- · Replies 1 ·
Undergrad As close as possible, without touching
- Warp
- · Replies 6 ·
Undergrad What are the units of amplitude and sample value in a sine wave loop?
- btb4198
- · Replies 7 ·
Stories from physics professors: E=mc², nothing's instability, and sloppy physics
- Aufbauwerk 2045
- · Replies 3 ·
Graduate Analog engineer self-teaching particle physics and astrophysics
- Guy Madison
- · Replies 5 ·
High School What Causes a Kick in Snooker?
- wolram
- · Replies 7 ·
Graduate Problem with a convolution algorithm
- Uriel
- · Replies 4 ·
High School Could a traffic jam in 1 road spread across all roads?
- caters
- · Replies 9 ·
Undergrad Who first developed the Rossby number and how was it derived?
- meteo student
- · Replies 1 ·
High School Do energy states exist analogous to matter's states?
- stoomart
- · Replies 6 ·
Undergrad How Do Osmotic Membranes Function and Prevent Solute Leakage?
- AamsterC2
- · Replies 2 ·
News How Is Thouless Pronounced in the Context of the Nobel Prize Announcement?
- Orodruin
- · Replies 33 ·
Undergrad How does swimming compare in microgravity, low gravity and high gravity?
- Brage Eidsvik
- · Replies 10 ·
Undergrad Standing wave in cylindar vs cone
- Phil Freihofner
- · Replies 6 ·
High School How can we measure Fragmentation/ discontinuity ?
- Aadharsh Aadhithya
- · Replies 2 ·
Graduate Physics essays heavy in math, bad or hard?
- gamow99
- · Replies 5 ·
High School Average Value Uncertainty: How to Compute?
- DoobleD
- · Replies 3 ·
High School Does the Earth's Mass Change Due to Biological Processes?
- Althepump
- · Replies 39 ·
High School Resonance of air between two loudspeakers
- resurgance2001
- · Replies 12 ·
High School Moving to a higher harmonic in a standing wave
- Saw
- · Replies 40 ·
Undergrad Why Are There Only Three Basic Units in Physics?
- TamirN
- · Replies 9 ·
Undergrad Will human civilization survive beyond 1000 years?
- hagar
- · Replies 12 ·
High School Vocabulary: What do you call spinning on the opposite axis?
- RabbitWho
- · Replies 3 ·
High School Getting identical phase signals in both stereo speakers from a single Audacity track
- houlahound
- · Replies 14 ·
Undergrad Where to Buy Meta Materials for Scientific Research?
- forex10
- · Replies 4 ·
High School Is distance continuous or "pixel" like?
- iDimension
- · Replies 9 ·
High School Density of air experiment, why it yields these answers?
- Glenn G
- · Replies 20 ·
Looking for a high vacuum 8" conlfat, any suggestions?
- mesa
- · Replies 2 ·
Graduate Concepts required to define a "system"?
- Stephen Tashi
- · Replies 5 ·
High School Locate and Eliminate Mosquitoes with Mosquito Radar
- fanieh
- · Replies 16 ·
High School Does gravity affect gamma rays, X-rays, and radio waves?
- hagar
- · Replies 6 ·
High School Do only electromagnetic waves contain particles like photons?
- Bradfordly1
- · Replies 3 ·
Undergrad Can viewing distance inversely measure eye strain with lens spring model?
- Miopen
- · Replies 13 ·
Graduate Physicists' knowledge of differential equations
- mpresic
- · Replies 14 ·
High School What is Energy? Join the Flame Challenge 2017 and Explain it to 11 Year Olds!
- gleem
- · Replies 3 ·
Undergrad Why is the kilogram defined by a physical artifact instead of a fundamental constant?
- Logical Dog
- · Replies 3 ·
Undergrad The Road to Reality by Roger Penrose
- Gosutag
- · Replies 1 ·
Graduate Stellar Nucleosynthesis - From Inanimate to Alive
- Shayne T
- · Replies 4 ·
False color overlays of the night sky from Australia
- BillTre
- · Replies 3 ·
High School Is it true that objects cannot touch each other?
- buket80
- · Replies 9 ·
Undergrad Is Artificial Gravity Created on the ISS Due to Tidal Locking?
- Myslius
- · Replies 2 ·
Undergrad Measuring advancing contact angle
- Experience111
- · Replies 1 ·
High School Why does real technology progress slower than science fiction depicts?
- nikiwonoto
- · Replies 3 ·
Undergrad Why Planck's Constant Has Dimensions and a Unit?
- Nader AbdlGhani
- · Replies 8 ·
Graduate Why Doesn't IV Flow Rate Increase Through a Constriction?
- Roshan Patel
- · Replies 1 ·
High School Can Water Flow Slowly Enough to Evaporate Before Filling Up?
- micromass
- · Replies 22 ·
High School What does the multiplication between two units mean?
- Ehden
- · Replies 6 ·
High School What is a homogeneous boundary condition?
- Physgeek64
- · Replies 1 ·
High School How to improve problem solving skills
- Galactium
- · Replies 1 ·
High School Why Does Mercury Enter Water in Andrews' CO2 Experiment?
- akashpandey
- · Replies 9 ·
Walter Greiner: October 1935 - October 2016
- George Jones
- · Replies 1 ·
Undergrad Coefficient from Maxwell-Boltzmann distribution
- Physics Dad
- · Replies 4 ·
The Rubber Band Theory of Bow Strings
- zoobyshoe
- · Replies 3 ·
Why does my netball go the wrong way?
- i-like-maths
- · Replies 5 ·
High School Calculate maximum safe volume for headphones
- George Albercook
- · Replies 3 ·
Who has more prestige, a physicist or an engineer?
- timpani
- · Replies 28 ·
Undergrad Interpreting FFT output from LabView for electrical signals
- MxwllsPersuasns
- · Replies 1 ·
Undergrad How does a floor mat dissipate noise/vibration?
- nomisme
- · Replies 11 ·
High School What is modal analysis and what are mode shapes?
- Shady99
- · Replies 1 ·
High School Is Scientific Theory Subject to Change Over Time?
- rashida564
- · Replies 27 ·
High School Publication Bias and Replication Crisis
- Ontophobe
- · Replies 7 ·
Undergrad "Rioting students determined to defy gravity"
- CWatters
- · Replies 19 ·
Undergrad Understanding Lyapunov Exponent: Why Do We Use an Exponential Function?
- ATY
- · Replies 1 ·
Undergrad Why do some but not all derivatives have physical meaning?
- MiLara
- · Replies 12 ·
Graduate Relations between statistical physics and theoretical CS
- StatGuy2000
- · Replies 3 ·
News Deborah Jin's death and her contributions to physics
- ZapperZ
- · Replies 14 ·
Undergrad How do I determine the proper ratio of CO2 and N for my tank?
- Jlat
- · Replies 1 ·
Who was the most important physicist to ever live?
- MiLara
- · Replies 9 ·
Graduate How can I make singular matrix become nonsingular matrix?
- munirah
- · Replies 6 ·
Undergrad Invalidating a patent directed to physical laws
- Polinomial
- · Replies 12 ·
Graduate What does it mean when we say something exists in physics?
- Shing Ernst
- · Replies 1 ·