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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 Understanding Measurement Uncertainty: Calculating Accuracy and Precision
  • fonz
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Graduate Physicists create 'negative mass'?
  • Greg Bernhardt
  • · Replies 21 ·
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Insights Assessing the Physics in Edmond Hamilton's "The Second Satellite" - Comments
  • klotza
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Nailing the Physics Forums: Relativity, QM & BTSM
  • Ibix
  • · Replies 2 ·
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Undergrad Is the following equation a wave?
  • Aritra Kundu
  • · Replies 10 ·
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Undergrad What is convection in a serpentine flow field?
  • nothing02
  • · Replies 10 ·
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Undergrad Why is there a sonic boom at Mach 1.5?
  • Dead Rabit
  • · Replies 6 ·
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High School Reporting length with error limits
  • Ahsan Khan
  • · Replies 18 ·
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High School Physics of transients -- general
  • houlahound
  • · Replies 11 ·
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11
High School Can a Wave Exist Without a Medium?
  • Gary Smith
  • · Replies 66 ·
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High School Equation for Conductivity of Aqueous Solutions
  • neilparker62
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High School How high does a wall need to be to block smoke?
  • CassieFordham
  • · Replies 8 ·
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High School Can orbiting lcds replace radio towers?
  • Samson4
  • · Replies 24 ·
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24
Graduate Increase Near Field Coverage & Power Use: Can It Be Done?
  • Robert D
  • · Replies 3 ·
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Graduate Why is math essential for understanding physical phenomena?
  • thetexan
  • · Replies 17 ·
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High School Why Do Some Fluorescent Lights Flicker While Others Don't?
  • Buzz Bloom
  • · Replies 5 ·
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5
High School Why does my room have better air flow when the door is almost closed?
  • Yawn
  • · Replies 4 ·
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4
Undergrad Vacuum created or suction created when we use peristaltic pump
  • krishna 1423
  • · Replies 3 ·
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High School A Question about transverse waves....
  • Kaneki123
  • · Replies 16 ·
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Graduate Understanding Beer-Lambert Law at Low Concentrations: A Biologist's Dilemma
  • Thiago Augusto
  • · Replies 3 ·
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3
Undergrad What would happen if you brought a deodorant can to 0 Kelvin
  • Ben70
  • · Replies 5 ·
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5
Need help on this question for a project i'm making
  • single0speed
  • · Replies 1 ·
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How many equations does a physicist write in his lifetime?
  • arpon
  • · Replies 5 ·
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High School A question about the significance of 3
  • Tanelorn
  • · Replies 14 ·
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High School How does polyphonic singing affect our perception of beat frequency?
  • houlahound
  • · Replies 5 ·
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Undergrad Abbreviations with mutliple meanings
  • Demystifier
  • · Replies 17 ·
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For an event to occur is a location required?
  • joel59
  • · Replies 6 ·
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6
Undergrad How to move cool air down through a house?
  • Tylercc
  • · Replies 8 ·
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Undergrad Are there hidden phenomena under the moon that only the naked eye can see?
  • INTP_ty
  • · Replies 15 ·
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News Who was Cecile DeWitt-Morette and what was her impact on physics?
  • George Jones
  • · Replies 2 ·
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Graduate Condensed Matter Physics Explained to a Lay Audience
  • DeathbyGreen
  • · Replies 5 ·
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5
High School What's the Rule for Possessives in Physics Terms?
  • Demystifier
  • · Replies 6 ·
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6
High School How does acoustic levitation use sound waves to make objects float?
  • jedishrfu
  • · Replies 8 ·
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8
High School What is the Physical Meaning of Multiplication in Physics?
  • Gurasees
  • · Replies 3 ·
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3
Graduate How would Cherenkov radiation play into GR, the dolphins' version?
  • EnumaElish
  • · Replies 2 ·
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Cool ball and feather drop experiment
  • davenn
  • · Replies 12 ·
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12
Undergrad Can a Spectrometer be used to detect material type?
  • jjoll
  • · Replies 2 ·
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Undergrad How to Control Basement Humidity Without Warming Air
  • Alt-Bringer
  • · Replies 6 ·
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High School Is it possible to harvest energy from fluid buoyancy?
  • Ahmad Esber
  • · Replies 5 ·
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5
High School What does the levitating frog feel?
  • bubal
  • · Replies 3 ·
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Graduate Measurement and error (error estimation and propagation)
  • otg
  • · Replies 4 ·
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Undergrad Final year project/ dissertation ideas
  • Jadaav
  • · Replies 3 ·
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3
Undergrad How many ticks would an instantaneous clock have in a minute?
  • Physics is awesome
  • · Replies 4 ·
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Undergrad Vibrating String: Blue & Red Line Resonance
  • Samson4
  • · Replies 14 ·
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14
Undergrad Why are pollutant emissions measured in g/km?
  • ksio89
  • · Replies 1 ·
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Why Did My Window Shatter During Nearby Construction?
  • May Briscoe
  • · Replies 5 ·
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5
Undergrad What are the limits on resolution of STORM/PALM?
  • Jon.G
  • · Replies 1 ·
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Undergrad How do standing waves continue propagating?
  • yosimba2000
  • · Replies 4 ·
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4
High School What Are the Most Accurate Smoke Detectors and How Do They Work?
  • fanieh
  • · Replies 18 ·
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Undergrad Modal frequencies of a vibrating circular membrane? (DRUM)
  • mikejm
  • · Replies 5 ·
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5
High School Closed surface bounding a volume V
  • Pushoam
  • · Replies 10 ·
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10
Undergrad Transfer of Kinetic Energy Through House Walls?
  • netrista
  • · Replies 11 ·
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11
High School Radiometric Term: Power Emitted/Vol/Angle
  • Khashishi
  • · Replies 5 ·
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5
High School Maximizing Wind Turbine Efficiency: Is Redirecting Wind Worth the Cost?
  • Axel Zakurov
  • · Replies 31 ·
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Undergrad Physics Undergrad Struggles to Retain Knowledge
  • LyleJr
  • · Replies 5 ·
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Undergrad Basic discussion about the ionosphere
  • HCD
  • · Replies 1 ·
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Graduate Most misunderstood physics concept
  • Greg Bernhardt
  • · Replies 67 ·
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High School What is a good film that has examples of the Bernoulli Principle
  • cubby208
  • · Replies 1 ·
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Undergrad Measuring Wave Speed: Reference Frame Considerations
  • Pushoam
  • · Replies 4 ·
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Graduate Calculate Third Octave Band Response from Narrowband Data
  • jasonbot
  • · Replies 1 ·
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What does the capital W stand for?
  • Mikko Artsola
  • · Replies 1 ·
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High School What is the real life utility of the dot product and cross product
  • Wrichik Basu
  • · Replies 11 ·
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March For Science, April 22, 2017
  • ZapperZ
  • · Replies 85 ·
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Mom's Guide to Supporting a Physics-Loving Kid
  • noobfm
  • · Replies 5 ·
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High School Do We Cross Infinity When Moving from A to B?
  • Deepak K Kapur
  • · Replies 48 ·
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Ask Einstein: What Would You Like to Know?
  • Greg Bernhardt
  • · Replies 22 ·
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Graduate Wooden vs iron sword causing bone fracture
  • be unique
  • · Replies 6 ·
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6
Undergrad Application of resonance in one end closed pipe in real life
  • Muaadh
  • · Replies 5 ·
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High School Solving SI Units with ln(n): A High School Puzzler
  • Const@ntine
  • · Replies 6 ·
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What Creates the Giant Whirlpool at Dam Overflows?
  • BillTre
  • · Replies 5 ·
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5
High School Is It Possible to Remove Mass from Matter While Retaining Its Form?
  • Quantum Velocity
  • · Replies 8 ·
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High School Can %age uncertainty in value ever be greater than 100?
  • Asad Raza
  • · Replies 6 ·
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6
High School Need a Physics Simulator for Engineering Project?
  • InventorX
  • · Replies 18 ·
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18
Graduate NMR Experiments: Why Do I Need a Broadband Probe Head?
  • annaline19
  • · Replies 3 ·
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High School What is the difference between PLC and PCL?
  • Lola1
  • · Replies 5 ·
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Undergrad Calculate the Dipole Moment of an object
  • optically challenged
  • · Replies 1 ·
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High School Do Different Types of Leaves Burn Effectively?
  • Blue Scallop
  • · Replies 4 ·
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Undergrad Question about the Scientific process
  • jobyts
  • · Replies 17 ·
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High School Doppler effect formula confusion
  • Silviu
  • · Replies 12 ·
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12
How many people can you recognise in this photo?
  • Farang
  • · Replies 10 ·
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10
Undergrad What are the causes and effects of contrails in the upper Mississippi valley?
  • Dr.D
  • · Replies 5 ·
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5
Undergrad How to obtain the resonance frequencies of a given material?
  • Andre Teixeira
  • · Replies 6 ·
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6
Undergrad Why incompressible flow does not satisfy energy equation?
  • aerograce
  • · Replies 9 ·
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High School Peer Review Process: A Scientific Check and Balance System?
  • hsdrop
  • · Replies 1 ·
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Undergrad Are We Becoming More Mathematical in Physics?
  • rahaverhma
  • · Replies 4 ·
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Kitchen Counter Moisture Mystery
  • Jaime Derecho PE
  • · Replies 2 ·
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High School Air Horn Physics: Calculating Size, Length & More for Musical Chords
  • Grant M
  • · Replies 6 ·
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6
Undergrad Alternatively, if you want a more concise title: What causes bubbles to merge?
  • member 428835
  • · Replies 3 ·
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High School Noob with some questions on Modeling Earth
  • cbeckelhymer
  • · Replies 25 ·
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Undergrad How does relative humidity drop below 100%
  • wasup23
  • · Replies 2 ·
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Undergrad Please share your chaotic systems....
  • MarcoJV
  • · Replies 6 ·
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6
High School The fundamental units in Physics
  • Vengo
  • · Replies 7 ·
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7
Graduate Single molecule fluorescence microscopy and limits
  • HAYAO
  • · Replies 4 ·
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4
Undergrad How would weather differ on a planet with a longer day?
  • Sherwood Botsford
  • · Replies 2 ·
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News Ancient particle accelerator discovered on Mars
  • EnumaElish
  • · Replies 5 ·
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5
High School The Mystery of Natural Violet: How Does Our Brain Perceive This Color?
  • Daniel Petka
  • · Replies 20 ·
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News RIP condensed matter theorist Alexei Abrikosov
  • Vanadium 50
  • · Replies 2 ·
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Undergrad Why is it that the fundamental harmonic is louder than rest?
  • Theudius
  • · Replies 13 ·
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Undergrad How are these symbols pronounced ?
  • momentum
  • · Replies 3 ·
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3
Graduate Measuring Air Leakage: Test for Watertight Seal
  • curiouskk
  • · Replies 3 ·
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3