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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.
Graduate How do we measure time more accurately?
  • ChaseRLewis73
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Undergrad How was avagadros number was calculated
  • SSJ2
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Undergrad How Does Taking Derivatives in Physics Differ from Mathematics?
  • V0ODO0CH1LD
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Undergrad Imitating ice for room-temp experiments
  • frankdoc
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High School More energy in bullets or batteries
  • Fezziwig
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High School Errors in Measurement: Types, Sources & Comparison
  • shalikadm
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9
Graduate Can Long Range MRI Scans Be Performed Using Maser Technology?
  • fredreload
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Graduate Fluid-structure interaction ansys tutorials
  • alex2008
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6
Undergrad Where can I learn about modeling and simulating situations and experiments?
  • Logical1
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Graduate Number systems and their effect on physics
  • Cody Richeson
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High School Solve Physics: Find m When f=mc^2
  • dollop
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2
Undergrad Need a little intuition on equation of travelling wave .
  • nishantve1
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High School Finding Average Molarity: SF in Data
  • frozonecom
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Which comes first matter or energy?
  • Reogl
  • · Replies 11 ·
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Undergrad The way math is used in physics vs. pure math
  • member 392791
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Undergrad Solving Percentage Errors: Different Magnitudes for Positive & Negative
  • lavster
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High School Significant Figures: Multiplying and Dividing
  • nebbione
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5
Undergrad Is 0.27 nN/nm equal to 270N/km in unit conversion?
  • musacci
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High School Rounding Up Numbers: Explained & Examples
  • nebbione
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4
Graduate What Are the Classic Problems of Physics?
  • Beer-monster
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9
Undergrad The Mystery: Understanding Resonance vs. Coherence
  • fractalzen
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4
Trying to find a paper by N.A. Kozyrev
  • BlankInfinity
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Graduate Errors and Numerical Integration
  • bobjones21
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2
High School How many square centimeters are in 3.39ft^2?
  • EGarner
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3
High School Understanding High Tides: The Role of the Moon and Earth's Rigid Crust
  • shiraztk
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Graduate Formulating Ripple Equation for 2D Symmetry
  • sodaboy7
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4
Undergrad Difference between raman-spectroscopy and usual spectroscopy?
  • timo1990
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1
Kitt Peak Nightly Observing Program - First Time in a Dark Sky!
  • Drakkith
  • · Replies 4 ·
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4
Graduate Physics and discrete mathematics
  • 1MileCrash
  • · Replies 17 ·
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Someone explain what this is actually saying?
  • cmmcnamara
  • · Replies 3 ·
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3
High School Questions About Wind: Get Answers Here
  • autodidude
  • · Replies 15 ·
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Why Do Glasses and Lightbulbs Spontaneously Explode on My Desk?
  • michojek
  • · Replies 33 ·
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Graduate Was the second originally defined in terms of the size of the Earth and c?
  • RadioTech
  • · Replies 29 ·
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High School How to use trigonometry on calculator
  • bcalkins
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Graduate Investigating the Magnus Effect on Solar Wind
  • d3mm
  • · Replies 2 ·
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2
What Is Time and Why Do We Misunderstand It?
  • thunderhadron
  • · Replies 37 ·
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Undergrad Learn About Sine Wave Separation and Sound Processing
  • EebamXela
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Graduate Who Can Achieve Landau's Theoretical Minimum in Physics?
  • maverick_starstrider
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Has the Large Hadron Collider Destroyed the World Yet?
  • mesa
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High School Do some scientists create equation that arent based on si units.
  • jaydnul
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5
High School How did Eratosthenes calculate the tilt of the Earth?
  • myshadow
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3
Undergrad What is the ideal degree for gas exit in a rifle barrel?
  • dano1955
  • · Replies 3 ·
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3
Where Is Voyager 1 Now on Its 35th Anniversary?
  • dlgoff
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High School So what units should i use with E=mc^2?
  • jaydnul
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High School Leaves have formed the circumference of the circle
  • aayushmittal
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Undergrad Affect of elevation on bicycle suspension
  • ruadhrigh
  • · Replies 1 ·
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High School What would happen if you could blow up a planet for real?
  • sshai45
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Move to Tucson Completed: New Astronomy Adventures Ahead!
  • Drakkith
  • · Replies 7 ·
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Undergrad Maximum depth at which you can breathe using a simple air pipe
  • Xiao10
  • · Replies 7 ·
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7
Graduate Modal Analysis of AC Unit: Refrigerant Considerations?
  • subha_iit
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Undergrad Making CO2 Gas Concentrations: 50ppm, 100ppm, 1000ppm
  • strokebow
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High School Basic trigonometry question regarding knee angle
  • joeblow001
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5
Undergrad What Are Michio Kaku's Contributions to Physics?
  • calvinjhfeng
  • · Replies 14 ·
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Graduate Solving Surface Tension w/Eötvös Rule: Obtaining Abnormal Results
  • wishgames
  • · Replies 6 ·
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6
Kilogram in France: Double-Bell or Triple-Bell Jar?
  • elPhys
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I would like to congratulate myself for no reason
  • rethipher
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3
Undergrad Maximizing Success in College Physics to Tackling a Daunting Textbook
  • Darth Frodo
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Undergrad Calculating Air Flow in 8mm Pipe at 15psi
  • christianmark
  • · Replies 5 ·
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5
Question about anti-matter colliding with matter
  • find_the_fun
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Undergrad Failure to understand a basic integral application
  • cantRemember
  • · Replies 9 ·
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9
Searching for a particular quotation by a renowned physicist
  • d3mm
  • · Replies 1 ·
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What could 100 grams of tnt destroy?
  • promeus
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Undergrad Why does the professor derive the equation?
  • 1MileCrash
  • · Replies 22 ·
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Undergrad How Accurate Is Calorie Counting Through Physical Activity?
  • krete77
  • · Replies 12 ·
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High School Unraveling the Mystery of e=mc2: How Much Mater is Needed?
  • Grimstone
  • · Replies 12 ·
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Escape Boredom with Science: What Are Some Intriguing Questions to Ponder?
  • prane
  • · Replies 7 ·
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Undergrad Can Mass be Converted to Volume without Gravity?
  • hubble_bubble
  • · Replies 15 ·
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Undergrad Can Standing Waves Form with Different Amplitudes or Frequencies?
  • pcsx22
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High School Doppler Effect Explained: What Is It?
  • DrPhy
  • · Replies 6 ·
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6
Undergrad Theoretical Aspects of Measurements
  • JameB
  • · Replies 1 ·
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Undergrad Creating an Artificial Cloud: Is It Possible?
  • ANarwhal
  • · Replies 16 ·
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Undergrad Cash prize offered for solving Mpemba effect
  • Studiot
  • · Replies 45 ·
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High School Why storms interfere with telecommunications?
  • Charles123
  • · Replies 10 ·
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Graduate Unperceivable Properties Of Physics
  • JayRad
  • · Replies 19 ·
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19
What is the best physics magazine or journal?
  • ThomasSatt
  • · Replies 9 ·
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9
Undergrad What is non-Modern physics called?
  • tejas777
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8
Graduate What is the meaning behind the Casi.Voy equation?
  • MUKAY
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12
High School How are units combined/cancelled in this simple equation?
  • ApoIlo
  • · Replies 7 ·
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7
High School Learn How to Project an Image on a CRT Monitor with a Small Projector
  • smidhunraj
  • · Replies 2 ·
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Assessment of JETP (Journal of Experimental and Theoretical Physics)
  • pdxjjb
  • · Replies 10 ·
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High School What Resources Can Help a High School Junior Explore Physics?
  • Robert4149
  • · Replies 6 ·
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6
Dispose of Compressed Air Can Safely on Hot Day
  • Vorde
  • · Replies 7 ·
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7
High School Blimps & Radar: Do They Show Up on Radar?
  • ANarwhal
  • · Replies 5 ·
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5
Graduate Can Noble Gases Be Used to Create Plasma for Engines?
  • klebrun
  • · Replies 40 ·
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Graduate Plasma Reactor creating gravitational fields
  • klebrun
  • · Replies 6 ·
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6
Time machine/time travel device construction ideas
  • curious_one82
  • · Replies 1 ·
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High School What is Energy? Seeking Clarity on a Confusing Topic
  • sanjib ghosh
  • · Replies 3 ·
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3
Undergrad Why is WR for 4x100m relay less than 4 times WR for 100m sprint.
  • glb_lub
  • · Replies 2 ·
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High School High School physics science project
  • Sush11
  • · Replies 3 ·
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High School Holding Water in glass upside down
  • I_am_learning
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Undergrad Is it possible to screw off the cap of an Argon/Oxygen-bottle?
  • Prometium
  • · Replies 6 ·
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6
Help with Identifying Image: 3K7P0W0
  • awesomedud
  • · Replies 5 ·
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5
Reading Speed with Scientific Texts
  • vanmaiden
  • · Replies 5 ·
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5
Undergrad A plausible method for telepathy (honest)
  • QuantumHop
  • · Replies 14 ·
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14
High School What causes a glass of water to move on its own on a glass surface?
  • ViolentCorpse
  • · Replies 13 ·
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About the scientific thinking and aliens
  • ensan
  • · Replies 1 ·
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Undergrad Wind turbine efficiency question
  • Khashishi
  • · Replies 16 ·
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16
Undergrad Measuring SI Units on a Desert Island
  • Fine Man
  • · Replies 13 ·
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13
Graduate Is Emergence the Key to Understanding the Mind and its Connection to Matter?
  • jeebs
  • · Replies 2 ·
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2
Undergrad Michelson Morley experiment and heliocentrism
  • Amok
  • · Replies 9 ·
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9