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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 Frozen fruit aggregates in hot porridge
  • Smatter
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4
High School How much should it cost to build an MRI Scanner?
  • Myles Cummings
  • · Replies 6 ·
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6
Undergrad Who First Named Physics Observers Alice and Bob?
  • ohwilleke
  • · Replies 3 ·
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3
Undergrad Is Double Pendulum taught to all Physics majors?
  • RipVanCalcNoob
  • · Replies 5 ·
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5
High School Unit conventions (SI versus others)
  • JR Jonsson
  • · Replies 104 ·
4
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104
Graduate Questions about the energy of a wave as a Taylor series
  • Chump
  • · Replies 8 ·
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8
Undergrad Why Do Physicists Write Integrals as ##\int dx f(x)##?
  • martinbn
  • · Replies 83 ·
3
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High School How can I make my friend love physics?
  • riley4190
  • · Replies 26 ·
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26
High School What Are the Different Fields of Physics Explored by Dominic Walliman?
  • jedishrfu
  • · Replies 2 ·
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2
Undergrad Babies Upside Down: How Buoyancy Protects from Gravity
  • compuser123
  • · Replies 11 ·
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11
Undergrad Dust Accumulation on Fan Blades and Elsewhere
  • LAP3141
  • · Replies 7 ·
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7
High School How Long Will My Camping Battery Last?
  • The Scarlet Pimple
  • · Replies 10 ·
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10
Undergrad How can I represent a stochastic process in 2D?
  • Frank Einstein
  • · Replies 2 ·
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2
High School Have you seen the Space Showers in Chicago?
  • fresh_42
  • · Replies 1 ·
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1
Need Forum for Outlandish Science Ideas
  • forex10
  • · Replies 3 ·
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3
Undergrad Is this just a normal fluorescence of glass molecules?
  • patric44
  • · Replies 10 ·
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10
Undergrad Fourier transform -- what physical variables am I allowed to transform between?
  • Higgsono
  • · Replies 6 ·
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6
Feynman Audio Lectures: Complete Set Available?
  • Markel
  • · Replies 34 ·
2
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34
Photo Contest - Spin Angular Momentum (6/23-6/29)
  • ZapperZ
  • · Replies 22 ·
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22
High School Traffic Turbines - Free Energy or Cost Exchange?
  • InquiringMind
  • · Replies 6 ·
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6
Undergrad Can tiny gas bubbles cause discomfort in body cavities?
  • tanas
  • · Replies 4 ·
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4
High School Why is Fire Considered Conductive?
  • abri
  • · Replies 8 ·
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8
Graduate Apliying PCA to two correlated stochastic processes
  • Frank Einstein
  • · Replies 2 ·
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2
Undergrad Looking for a cheap digital scale with accuracy <1 g
  • joniverson
  • · Replies 5 ·
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5
Undergrad Why are the last two digits of the mass of an electron in parentheses?
  • Mason Smith
  • · Replies 4 ·
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4
Great Domain of Science Video on Movie Sci Fi
  • jedishrfu
  • · Replies 1 ·
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1
Graduate Why Is Mechanics So Difficult to Master?
  • Beanyboy
  • · Replies 65 ·
3
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High School How does the ear distinguish multiple different pitches?
  • Sophrosyne
  • · Replies 18 ·
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18
Graduate Calculating decay rates for modes of a circular membrane
  • mikejm
  • · Replies 1 ·
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1
Undergrad Designing Rehabilitation Equipment for an Upper Limb (arm)
  • SilverJW
  • · Replies 2 ·
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2
High School Expert Tips for Solving Physics Problems | Ace Your Finals in 6 Days!
  • vanessa99
  • · Replies 11 ·
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11
Graduate Free bar fundamental vibration relationship length to width
  • Ross M Mccullough
  • · Replies 1 ·
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1
Undergrad Predicting the decay time of a resonant bandpass filter
  • mikejm
  • · Replies 1 ·
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1
High School What we mean in physics definition (quantity or property)?
  • ado sar
  • · Replies 1 ·
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1
News Physics, What have you done lately?
  • gleem
  • · Replies 12 ·
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12
High School Question about the allassonic effect
  • bunburryist
  • · Replies 3 ·
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3
High School Can Height, Shadow Length, and a Photo Reveal a Person's Location?
  • kent davidge
  • · Replies 7 ·
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7
Undergrad How Does a Pressurized Tank Empty Over Time Through a Hole?
  • ab042896
  • · Replies 3 ·
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3
Can you predict when Manhattanhenge will occur this year?
  • BillTre
  • · Replies 1 ·
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1
High School Why does GPS require an accurate clock?
  • Tech2025
  • · Replies 25 ·
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25
Undergrad Burn Out & Boredom: How to Keep STEM Learning Fun
  • gibberingmouther
  • · Replies 2 ·
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2
Graduate Time Magazine: instantaneous communication via entanglement
  • phinds
  • · Replies 15 ·
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15
Undergrad Deterministic chaos in linear systems
  • Benhur
  • · Replies 1 ·
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1
Undergrad What does peak intensity mean in qualitative XRD?
  • Baho Ilok
  • · Replies 1 ·
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1
High School Examples of discoveries without a hypothesis?
  • RobertSpencer
  • · Replies 21 ·
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21
Undergrad Is it possible to have a breathable atmosphere at 6 atm
  • caters
  • · Replies 11 ·
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11
Undergrad Need a practical example of E=mc^2 with real numbers
  • GeorgeW
  • · Replies 1 ·
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1
Undergrad What is the most efficient radiator shape?
  • Christofer Br
  • · Replies 6 ·
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6
News Did Homer Neal's Contributions to Physics and Education Leave a Lasting Legacy?
  • Vanadium 50
  • · Replies 1 ·
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1
High School Why Do We Lose Cell Phone Connection Outdoors Without Buildings or Cars Nearby?
  • Tech2025
  • · Replies 3 ·
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3
High School Who drew the first model of the atom?
  • William Chua
  • · Replies 13 ·
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13
High School Is Learning Existing Knowledge Essential Before Developing New Theories?
  • Suyash Singh
  • · Replies 6 ·
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6
Undergrad A model of what makes up the physical world
  • pkc111
  • · Replies 85 ·
3
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Will you be attending the AAPT Summer Meeting 2018?
  • Dr Transport
  • · Replies 1 ·
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1
News RIP David Pines: Physics Giant Who Could Have Won Nobel Prize
  • ZapperZ
  • · Replies 3 ·
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3
Undergrad Experiment Ideas using an MRI scanner?
  • Kal98
  • · Replies 31 ·
2
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Daily challenges confronting physicists
  • rpthomps
  • · Replies 2 ·
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2
Graduate Why does a guitar string "beat" as if it is out of phase?
  • mikejm
  • · Replies 11 ·
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11
High School A couple of links about, not from science
  • fresh_42
  • · Replies 16 ·
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16
Undergrad Musings on waves - possible or already realised?
  • Jehannum
  • · Replies 4 ·
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4
High School What does coefficient of increase of physical quantity mean?
  • Nabin kalauni
  • · Replies 3 ·
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3
Undergrad How Can Muscle Strain Be Measured?
  • Miopen
  • · Replies 1 ·
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1
High School Royal Society revives a strange old document
  • slow
  • · Replies 17 ·
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17
News Prof. E. C. G. Sudarshan is no more
  • Wrichik Basu
  • · Replies 2 ·
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2
Undergrad Who's moving towards whom in Doppler effect situations?
  • azzarooni88
  • · Replies 14 ·
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High School Can time travel affect cell phone communication?
  • slow
  • · Replies 10 ·
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10
100th anniversary of Feynman's birth
  • dRic2
  • · Replies 9 ·
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9
Undergrad Analysis of Ultrasonic Waves at a point
  • CGandC
  • · Replies 7 ·
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7
Graduate What would AI *want to do*, according to physics?
  • Posty McPostface
  • · Replies 5 ·
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5
Graduate Help with Remote Sensing Finals: Spatial Res., Radiometric Res., Resampling
  • ChrisKooij
  • · Replies 2 ·
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Graduate Recently, I want to write something about data in physics
  • Pring
  • · Replies 5 ·
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5
Undergrad What Is the Equation Relating Wind Erosivity to Velocity and Air Density Called?
  • Gondur
  • · Replies 1 ·
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1
Undergrad Calculate measurement uncertainty? I made one measurement....
  • olgerm
  • · Replies 13 ·
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13
High School Is There Truly an Inside and Outside?
  • ddjj77
  • · Replies 9 ·
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9
High School Running on Ice: My High School Story
  • Stephenk53
  • · Replies 5 ·
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5
I "met" a physics Nobel Prize winner yesterday
  • jtbell
  • · Replies 5 ·
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5
Excerpts from Letters by Dyson about Feynman
  • BillTre
  • · Replies 4 ·
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4
Undergrad How does the equation for experimental uncertainty work?
  • Schfra
  • · Replies 6 ·
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6
Undergrad What would be a useful application for 10 Thz nano-antennas?
  • Tech2025
  • · Replies 1 ·
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1
High School Why do microcontrollers fail in a Vacuum?
  • Tech2025
  • · Replies 18 ·
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18
Graduate What Is a Fourier Series?
  • Tech2025
  • · Replies 7 ·
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7
High School Why does bonding occur between atoms?
  • Kenneth Boon Faker
  • · Replies 3 ·
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3
Graduate How were you exposed to probability theory in physics?
  • StatGuy2000
  • · Replies 6 ·
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6
High School Why Does Closing My Door Increase the Breeze in My Room?
  • blackmarch103
  • · Replies 3 ·
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3
High School Why Is Tornado Alley a Hotspot for Twisters?
  • Drakkith
  • · Replies 5 ·
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5
Undergrad Clarification for a standing wave on a string equation
  • rudy
  • · Replies 5 ·
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5
Undergrad Physically relevant: fractals, phi?
  • nomadreid
  • · Replies 1 ·
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1
Undergrad Quiz question: Who Dies If 'E' Pushes The Stone?
  • swampwiz
  • · Replies 3 ·
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3
Undergrad What is the thickness of the atmosphere?
  • Shing
  • · Replies 4 ·
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4
Undergrad Proof of a law versus proof of a theorem
  • kartikey
  • · Replies 3 ·
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3
Undergrad Identifying & Accounting for Systematic Error in Scales with 1mg Capacity
  • Jhon81
  • · Replies 6 ·
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6
Undergrad How many ion-pairs are there in normal conditions in the air?
  • ORF
  • · Replies 5 ·
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5
High School Can Digital Radios Tune Without Moving Parts?
  • Tech2025
  • · Replies 2 ·
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2
High School Showing/proving a physical relationship
  • Dong Min
  • · Replies 11 ·
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11
Undergrad What is the difference between transverse and plane waves?
  • dyn
  • · Replies 11 ·
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11
Undergrad Aesthetically pleasing formulae involving time?
  • ThomasQuinn
  • · Replies 8 ·
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8
Graduate "Humpty-Dumpty" particle (Eggeron) discovered at CERN on April 1st, 2018
  • Wrichik Basu
  • · Replies 5 ·
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5
Undergrad Adhesive Forces: Bigger vs. Smaller Straws
  • Dion
  • · Replies 2 ·
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2
High School The Wave Equation and Traveling Waves
  • harambe
  • · Replies 10 ·
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10
Undergrad Aviation safety plane crash question/idea
  • girts
  • · Replies 18 ·
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18