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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 What is an intuitive definition of Hertz?
  • Inventor man
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Phys graduates, do people assume you know more than you actually do?
  • AntiElephant
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Undergrad Relation between energy of traveling wave with displacement curve
  • Jackson Lee
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Can I do this? I am 5'2", 120 lbs.
  • summersnow
  • · Replies 2 ·
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Graduate Can Noble Gases Be Manipulated to Produce Specific Emission Spectrum Lines?
  • radaballer
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Undergrad How Can NO2 Be Separated from Car Exhaust for Nitric Acid Production?
  • Camotubi
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5
Undergrad There is little molecule bond between gas molecules, then why we have
  • Jackson Lee
  • · Replies 20 ·
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Undergrad Quality/timbre of identical guitars
  • Fiona Rozario
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5
Graduate Using graphite as a catalyst to break down Ozone
  • Hawk Eyes
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High School Significant Figures in long physics calculations?
  • atkin
  • · Replies 4 ·
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4
Graduate What materials would produce an impedance mismatch?
  • mcriv880
  • · Replies 6 ·
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6
Undergrad Structural Differences Between Red, Blue and Green Xenon Lamps
  • radaballer
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Found this on 9gag and would like to know the answer
  • pedromatias
  • · Replies 3 ·
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High School Waves that can pass through the body
  • ChromeBit
  • · Replies 6 ·
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6
Undergrad Longer conduit Impedes flow? What?
  • bobrsanchez
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Undergrad Does plucking one point on the string really can cause standing wave?
  • Jackson Lee
  • · Replies 4 ·
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4
Graduate Can someone explain what Michio Kaku is talking about in this video?
  • Jamin2112
  • · Replies 15 ·
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Graduate Capillary action with respect to "wicking beds"
  • dferasmus
  • · Replies 2 ·
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2
Think about it - Airplane on a treadmill
  • ineedhelpnow
  • · Replies 21 ·
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Undergrad Calculating Waves on a String: Answer Justification and Confusion Dispelled"
  • bobrsanchez
  • · Replies 2 ·
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High School Good physics research project for high schooler?
  • Landman
  • · Replies 1 ·
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Undergrad Audio for Wikipedia math articles
  • Stephen Tashi
  • · Replies 4 ·
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4
Undergrad Will I float about 100 km above earth surface?
  • bhanugarimella
  • · Replies 6 ·
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6
Graduate Social Physics: A New Theory of Human Social Interaction
  • microsansfil
  • · Replies 8 ·
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Undergrad Removing Gas Bubbles from Liquid Without Contact
  • hamilton17
  • · Replies 2 ·
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Undergrad Ultrasonic Cavitation: Can I Produce Acoustic Cavitation?
  • hamilton17
  • · Replies 5 ·
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5
Undergrad Indoor Flower Garden & Plant Growth: Inverse Square Law
  • notty1975
  • · Replies 8 ·
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8
High School States of Matter: 3 vs 5? School Help
  • Sciencekid
  • · Replies 3 ·
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3
Undergrad How much Knowledge about science and math has changed since Einstein?
  • !Jon Snow!
  • · Replies 5 ·
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5
Undergrad Why doesn't our body experience equal pressure when we press our finger?
  • aditya ver.2.0
  • · Replies 4 ·
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Graduate Can a string of data be both random and meaningless?
  • Yoni
  • · Replies 1 ·
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Graduate Memorizing Equations for Physics: Is It Necessary?
  • pierce15
  • · Replies 5 ·
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5
High School What colour is the sky on other planets?
  • !Jon Snow!
  • · Replies 2 ·
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2
Milk Food Coloring And Dish Soap Experiment
  • Greg Bernhardt
  • · Replies 1 ·
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High School Can a Stable Dipole Exist Without Charges Neutralizing?
  • FerN61
  • · Replies 2 ·
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What is your favorite branch of physics?
  • Alexander*GR*
  • · Replies 17 ·
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Do Solids Like Wood Produce Smells?
  • Jupiter60
  • · Replies 7 ·
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7
Undergrad Would Fluid Droplets Land in the Same Position in a Vacuum?
  • Mhorton91
  • · Replies 2 ·
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Have you ever heard of the physicist Alex Abastian (sp?)
  • warfreak131
  • · Replies 3 ·
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3
Uncovering the Mysteries of Sauteing Onions in Boiling Sugar
  • mrspeedybob
  • · Replies 1 ·
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High School Lithium Batteries: Benefits & Properties
  • taregg
  • · Replies 1 ·
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Are there any theories in physics that you don't believe?
  • Sparer
  • · Replies 3 ·
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Undergrad Will a resonator change its Freq while energy is added?
  • ctech
  • · Replies 5 ·
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5
Undergrad Can a Boeing 777 survive diving into the ocean like a bird?
  • wahoo
  • · Replies 15 ·
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Undergrad Waves having energy with no mass
  • Scimaster
  • · Replies 5 ·
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5
Graduate Casual talk. Constrained Hamilton systems. Dirac brackets.
  • jostpuur
  • · Replies 6 ·
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High School Road where each section 1/10 of the last section.
  • andreasdagen
  • · Replies 6 ·
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Graduate Do physics books butcher the math?
  • Arsenic&Lace
  • · Replies 233 ·
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High School What is the difference between sodium and sodium metal?
  • taregg
  • · Replies 1 ·
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Undergrad Amplitude decrease with geometrical spreading
  • AlecYates
  • · Replies 1 ·
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Undergrad Some weird physics questions I'd like answering please
  • Gondur
  • · Replies 4 ·
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4
High School Matter & Energy: Is it the Same Thing?
  • mrhoneycinnamo
  • · Replies 19 ·
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Undergrad Free Video Lectures from universities, all Math and Physics courses
  • flyingpig
  • · Replies 42 ·
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Graduate Effects on an explosions force based on varied gas densities?
  • Matrixmage
  • · Replies 2 ·
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High School Bending Vectors: Can We Make Curvy Ones?
  • nukes123
  • · Replies 2 ·
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High School Discover the Derivation of Solid Angle: Short and Simple Method
  • Hardik Batra
  • · Replies 2 ·
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2
High School I need to do a project for science fair based on Newton's laws
  • Govind_Balaji
  • · Replies 4 ·
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High School Cream on Top: Why is it So Much Denser than Milk?
  • vin300
  • · Replies 4 ·
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Where can I find free physics video lectures?
  • Spinnor
  • · Replies 8 ·
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8
Undergrad How relevant is the Feynman's Lectures on Physics?
  • mrhoneycinnamo
  • · Replies 2 ·
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High School How Do Gradients, Rates, and the Term 'Per' Relate to Division and Ratios?
  • Miraj Kayastha
  • · Replies 3 ·
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Graduate Net gravitational force inside a shell
  • jaydnul
  • · Replies 4 ·
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4
Graduate Group Velocities: Understanding Sound Pulse Faster Than C
  • PapalPhysicist
  • · Replies 5 ·
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High School Battery Capacity Loss: Noob Ques. Answered
  • Alex Jong
  • · Replies 7 ·
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Undergrad What is difference between natural sodium and metal sodium
  • taregg
  • · Replies 2 ·
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High School What are the different types of Mass?
  • Natsirt
  • · Replies 14 ·
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Graduate How can different types of plastic be cheaply and easily identified?
  • Evanish
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Graduate Sampling a signal and do the discrete Fourier transform
  • wybmax
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Graduate Material Conductivity: Material with Variable Ohmic Resistance
  • sondreL
  • · Replies 1 ·
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1
Undergrad How Do Waves Propagate on a String?
  • Greg Bernhardt
  • · Replies 0 ·
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Graduate Open End: Definition, Explanation & Equations
  • Greg Bernhardt
  • · Replies 1 ·
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1
Graduate Individual Measurement Uncertainty vs. Standard Error of Regression
  • member 515199
  • · Replies 10 ·
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High School Differences in iron properties inside & outside the body
  • taregg
  • · Replies 2 ·
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2
High School Does Water on the Table Improve Flip Cup Success?
  • OmicronPersei8
  • · Replies 2 ·
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High School Does Hair Matter in Soccer Headers?
  • Delta2
  • · Replies 1 ·
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High School Newbie Questions about Units in Physics Equations
  • Incognito310
  • · Replies 5 ·
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5
High School X-Ray Shielding: Importance in Medical Technology
  • mediray
  • · Replies 4 ·
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4
High School Is this a real graph or is it made up?
  • gauss44
  • · Replies 9 ·
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Undergrad Squaring the Circle - Is There More to It?
  • gnikm
  • · Replies 9 ·
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High School Can we perceive matter directly?
  • Jupiter60
  • · Replies 2 ·
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2
Graduate Overanalyzing things from a physics point of view
  • DarkFalz
  • · Replies 6 ·
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6
High School What is Fire? Chemical Reactions & Light Energy
  • Ayesha_Sadiq
  • · Replies 17 ·
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Graduate Calculating Radar Cross Section for a Spherical Object in GHz Frequency
  • jamcintyre1
  • · Replies 1 ·
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Graduate Quartz Crystal Microbalance equilibrium
  • dorins
  • · Replies 2 ·
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2
Undergrad Green LED in liquid nitrogen turns yellow
  • Physics2.0
  • · Replies 6 ·
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Undergrad Measurable quantites vs Base units
  • elegysix
  • · Replies 18 ·
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18
High School The Science Behind Matchbox Experiments for Beginners
  • Oomph!
  • · Replies 7 ·
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7
Undergrad What is the nature of the force of gravitation?
  • Syed Ammar
  • · Replies 12 ·
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High School How to Convert .4350 into Cubic Centimeters?
  • Zebedee
  • · Replies 4 ·
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4
Undergrad Calculating Food Mass for Carb Counting: Tips for Diabetics on the Go
  • Nerdydude101
  • · Replies 4 ·
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4
Summer Reading for Physics Teachers: Physics Books to Read
  • woodsAJ7
  • · Replies 1 ·
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Shadow of Steam: Seeing the Unseen
  • Manraj singh
  • · Replies 1 ·
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1
Undergrad A question on Dimensional Analysis
  • Yashbhatt
  • · Replies 6 ·
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6
Graduate How can teeth be bent without contact forces
  • nemolovesomni
  • · Replies 1 ·
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Graduate Effects of Concentrated Waves at a Single Point | Infinite Wave Impact
  • enquirealways
  • · Replies 7 ·
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Undergrad Significant Figures and Units in Physics Calculations
  • PFuser1232
  • · Replies 5 ·
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5
High School Where Can I Begin to Understand Physics and Mathematics as a Beginner?
  • cyber850
  • · Replies 3 ·
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High School How Does the Floating Match Trick Work?
  • Nerdydude101
  • · Replies 1 ·
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1
Undergrad Why does CO molecule have 7 degrees of freedom?
  • Hardik Batra
  • · Replies 4 ·
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4
Undergrad How Does a Transistor Output Multiple Frequencies Simultaneously?
  • Salvador
  • · Replies 9 ·
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