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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.
High School Trig question, I'm sure I'm being silly but help please....
  • shott92
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High School Who Created the Inverse Square Law Theory
  • InverseSquareLaw
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Undergrad Pro's and con's of suspended speakers
  • spikey1973
  • · Replies 5 ·
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5
Undergrad How to Estimate Uncertainty for a Physical Quantity with Dependent Variables?
  • bznm
  • · Replies 2 ·
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High School Need help to create an experiment
  • Waffuru
  • · Replies 8 ·
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8
Graduate Do Wind Turbines Significantly Alter Weather Patterns?
  • Iain53
  • · Replies 2 ·
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2
Graduate Multi Gaussian Beam Derivation | Example Matrix
  • chiraganand
  • · Replies 2 ·
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2
Insights Physics Forums Crackpot Index - Comments
  • Greg Bernhardt
  • · Replies 111 ·
4
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High School What is the True Frequency of Sound When Striking Wood at Different Rates?
  • houlahound
  • · Replies 2 ·
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2
High School Find 3D Models of Waves | Get Creative with 4D Displays
  • DianaHerberg
  • · Replies 7 ·
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7
Graduate Who does the ordinary man contact?
  • Paulocks
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2
Undergrad A question about non-conductive materials
  • TAOindustries
  • · Replies 8 ·
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8
Undergrad What is the most suitable sensor for measuring punch force?
  • btb4198
  • · Replies 2 ·
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2
What is the name of this Laboratory Instrument?
  • anferoar6
  • · Replies 3 ·
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3
Undergrad Are Physical Laws Truly Reversible?
  • Happiness
  • · Replies 29 ·
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29
Layperson who promises to try to not be annoying
  • Ninapdoula
  • · Replies 11 ·
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11
High School Specific Gravity of Various Types of Gold
  • sam ham
  • · Replies 4 ·
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4
High School Boxer Versus rattlesnake -- physics motivator
  • houlahound
  • · Replies 8 ·
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8
Graduate Is There Scientific Proof that Particles are 'Aware' of Their Surroundings?
  • Andew
  • · Replies 15 ·
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15
Undergrad How Can Thinking From First Principles Enhance Critical Thinking?
  • Etienne Pilon
  • · Replies 8 ·
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8
High School How to increase brightness of projector
  • Avijit Palit
  • · Replies 3 ·
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3
High School Will Solar Roads Ever Be Profitable?
  • houlahound
  • · Replies 17 ·
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Declared Physics Major - Exciting News!
  • StrangeCharm
  • · Replies 3 ·
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3
High School Can all elements, (not including gases) form Ionic Bonds?
  • cj20x2
  • · Replies 4 ·
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4
High School Determining the Damping Factors in Guitar Bodies: A Scientific Inquiry
  • Landru
  • · Replies 6 ·
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6
Undergrad Uncertainty in Measurements: Understanding Multiplication Factors
  • averycasille
  • · Replies 9 ·
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9
Undergrad Can you identify these equations?
  • Luxor123
  • · Replies 3 ·
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3
The number one physics book on Amazon of Italy
  • marcus
  • · Replies 19 ·
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19
How Does the Stroboscopic Effect Transform Easter Eggs?
  • Majorana
  • · Replies 1 ·
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1
High School Phase difference in standing wave
  • Gajan1234
  • · Replies 3 ·
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3
Predictions for the Nobel Prize in physics for next few years 2016-2017-2018?
  • Peter25samaha
  • · Replies 4 ·
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4
Insights Interview with a Theoretical Physicist: Carlo Rovelli - Comments
  • Greg Bernhardt
  • · Replies 6 ·
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6
Undergrad What is the Definition of Apparent Wind Angle on a Boat?
  • Neeps
  • · Replies 3 ·
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3
Graduate Did Einstein believe in Gravitational waves?
  • poom
  • · Replies 14 ·
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14
Undergrad Why teleportation, time travel, virtual reality haven't happened yet?
  • nikiwonoto
  • · Replies 13 ·
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13
High School Zero Errors in Vernier Calipers and Micrometer Screw Gauge
  • kunkun
  • · Replies 5 ·
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5
High School Doubts regarding equation of waves
  • Dexter Neutron
  • · Replies 8 ·
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8
Can anyone tell me what this equation is?
  • Daniel Colombo
  • · Replies 3 ·
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3
High School What would be the implications of a theory of everything?
  • KarminValso1724
  • · Replies 3 ·
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3
Undergrad What caused this unique ice formation near freezing temperatures?
  • Iain
  • · Replies 9 ·
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9
Undergrad Why we use Dirac delta function? (in 1 Dimension & 3 Dimesions)
  • Nasbah BM
  • · Replies 11 ·
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11
Insights Interview with a Theoretical Physicist: Garrett Lisi - Comments
  • Greg Bernhardt
  • · Replies 4 ·
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4
High School How to understand wavelength in a simple way
  • ThatOneSheep
  • · Replies 6 ·
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6
Undergrad Beats Production: Is Light or Sound a Simple Harmonic?
  • Molar
  • · Replies 1 ·
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1
High School What Is a Wave Made Of? Understanding the Medium Behind Waves
  • Aman Trivedi
  • · Replies 24 ·
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Physicist that is also Eagle Scout
  • Summer12
  • · Replies 4 ·
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4
Undergrad Aspiration Power: Needle Tip Effect
  • Luis G
  • · Replies 1 ·
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1
Undergrad What is the effect of a square transparent rectangle on the meniscus in a tube?
  • Helphelphelp
  • · Replies 2 ·
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2
How much physics in Fallout (games)
  • James Holland
  • · Replies 2 ·
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2
High School Why don't we use arc length formula to calculate wavelength?
  • LLT71
  • · Replies 8 ·
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8
Undergrad What is the Math symbol for "corresponds with"
  • ppppparker
  • · Replies 3 ·
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3
Undergrad Gradient of travel time in layered media?
  • ytht100
  • · Replies 2 ·
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High School What is isotropic medium and homogeneous medium
  • Aafia
  • · Replies 9 ·
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9
High School Is the Internet Filled with Deceptive Scientific Articles?
  • nnope
  • · Replies 10 ·
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10
Graduate Average amplitude of signal is zero, why?
  • Geek007
  • · Replies 6 ·
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6
High School It didn't make sense how physics was hard while math wasn't.
  • Eclair_de_XII
  • · Replies 8 ·
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8
High School International Change Electric Charge Day
  • fedaykin
  • · Replies 5 ·
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5
Scott Kelly & Gravity: Astronaut's Experience of Re-Entry to Earth
  • DiracPool
  • · Replies 3 ·
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3
High School What constitutes a body of mass?
  • cjs94
  • · Replies 3 ·
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3
High School How is Phase Difference of 4π Possible with AC = 7λ & BC = 5λ?
  • Dexter Neutron
  • · Replies 5 ·
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5
Undergrad Good study habit increases chances of doing good at Physics?
  • Drex C
  • · Replies 3 ·
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3
Undergrad Number of significant figures in 5*5.364
  • Elena14
  • · Replies 5 ·
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5
Undergrad Confusion Over Hydraulic Gradient, L parameter
  • Typhon4ever
  • · Replies 1 ·
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1
High School Understanding Frame Rates and Exposure Time in Video Capture
  • Inwicta
  • · Replies 14 ·
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14
Undergrad How can I calculate uncertainty in my lab report data?
  • Hayool
  • · Replies 3 ·
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3
What Substances Can Enhance Magic Tricks?
  • Mastico
  • · Replies 3 ·
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3
What makes physics interesting to physica majors?
  • Blockeus
  • · Replies 7 ·
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7
Undergrad Calculating Delta P in Vacuum Chambers: P1 or 0?
  • ahmed11
  • · Replies 3 ·
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Graduate Why do vacuum and the air behave so similarly ?
  • aaeushsingh
  • · Replies 4 ·
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4
High School Addition of Frequencies: Combining Same Phase, Different Amplitudes
  • henil
  • · Replies 2 ·
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2
Undergrad Parallel Pipeline: Pressure Flow Direction?
  • Domagoj
  • · Replies 1 ·
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1
Socks in the Dryer: Benjamin Franklin's Positive-Negative Theory
  • Hornbein
  • · Replies 7 ·
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7
High School Can I Connect Tank 1 & Tank 2 to Create a Water Level Difference?
  • Domagoj
  • · Replies 13 ·
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13
Undergrad Am I wrong, or is my professor? Intensity Question
  • FerPhys
  • · Replies 31 ·
2
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I found the best teacher of physics
  • Steven Robbin
  • · Replies 4 ·
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4
High School A grenade blowing up in a room with no air
  • ahmed11
  • · Replies 6 ·
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6
Undergrad Anti-Gravity Force: Is the Unit a Negative Newton?
  • Einstein's Cat
  • · Replies 3 ·
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3
Undergrad Ear Resonance Frequency: L=5 cm, Water Velocity 1500 m/s
  • Resul
  • · Replies 1 ·
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1
Graduate Coffeeshop Astrophysics Meeting on Gravitational Waves
  • Greg Bernhardt
  • · Replies 8 ·
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8
Graduate A new invention but no completed
  • Thinkingmachine
  • · Replies 1 ·
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1
Undergrad Maximum number of layers of immiscible of fluids
  • DaTario
  • · Replies 2 ·
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2
How do you perceive these lines to be rotating?
  • Spinnor
  • · Replies 29 ·
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29
Undergrad Human comprehension while moving at high speeds?
  • Dillon1312
  • · Replies 11 ·
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11
Undergrad Was Gravity Probe-B worth it's enormous price tag?
  • Aaronvan
  • · Replies 18 ·
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18
Undergrad What exactly is a general probability distribution?
  • Zacarias Nason
  • · Replies 2 ·
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2
Meet Physicist ZapperZ - Meet a Mentor Series
  • Greg Bernhardt
  • · Replies 21 ·
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21
Graduate What's the difference between Stat. Physics and Stat. Mech?
  • Zacarias Nason
  • · Replies 2 ·
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2
Undergrad What distinguishes one mode of vibration from another?
  • Zacarias Nason
  • · Replies 5 ·
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5
Undergrad Capillary rise in tube of insufficient length
  • SDewan
  • · Replies 3 ·
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3
Graduate Is the Media Hype Around Gravitational Waves Beneficial or Harmful to Physics?
  • Paulibus
  • · Replies 18 ·
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18
Graduate Reflecting about the book: "Just Six Numbers", Martin Rees
  • Hellmut1956
  • · Replies 4 ·
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4
Gravitational Waves Detected at LIGO?
  • Math Amateur
  • · Replies 5 ·
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5
Undergrad How Do Feedback Loops Influence Social Media Dynamics?
  • Justice Hunter
  • · Replies 5 ·
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5
Undergrad Simple Harmonic Progressive Wave
  • SDewan
  • · Replies 1 ·
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1
Undergrad LIGO [ meeting on Thursday on 11 feb 2016]
  • ujjwal3097
  • · Replies 1 ·
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1
High School What materials can be used in an egg drop challenge without tape or glue?
  • Elan_se
  • · Replies 2 ·
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2
I am looking for interesting physics/math or logic problems
  • pabilbado
  • · Replies 19 ·
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19
High School Can MRI Detect a Light Bulb Inside a Closed Box?
  • fredreload
  • · Replies 38 ·
2
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38
Best Physics Journals: Condensed Matter & Update
  • chikou24i
  • · Replies 4 ·
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4
Undergrad Why does 'breaking' not occur in liquids and gases?
  • Prannu
  • · Replies 5 ·
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5