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.
Threads
Undergrad Why do we need in-phase & quadrature components of a signal?
- Fiona Rozario
- · Replies 4 ·
Undergrad Does a Big Defensive Bark Drain a Dog's Energy?
- houlahound
- · Replies 7 ·
High School Why Do Waves Oscillate Like a Pendulum?
- Einstein's Cat
- · Replies 2 ·
Undergrad Gravitational Effect of Uniform Mass on Earth's Surface
- Jaller1404
- · Replies 4 ·
High School Why do we feel touch if atoms never physically contact?
- bondinthesand
- · Replies 51 ·
Graduate Unable to understand vector derivative
- GiuseppeR7
- · Replies 5 ·
Graduate Is Cold Fusion Making a Comeback with Serious Investment?
- CWatters
- · Replies 2 ·
Undergrad Way of producing 600kHz longitudinal waves - Piezo or siren
- AlgoryThm
- · Replies 15 ·
Undergrad What Is the Difference Between Atoms in High and Low Fields?
- SUN Qian
- · Replies 3 ·
High School Creating a Home-made Vacuum Chamber
- Conservation
- · Replies 23 ·
High School Are Mass and Energy the same thing?
- Natsirt
- · Replies 25 ·
High School Why does the Sun burn without much oxygen or carbon?
- gokhul
- · Replies 14 ·
High School Make a Toy Piston: Find Solution to Inner Can Size Issue
- Althepump
- · Replies 5 ·
Stellerator Status: Updates on Data Collection and Press Releases
- houlahound
- · Replies 5 ·
High School Calculating Batteries to Power a PC - A Curious Question
- Dougieman1001
- · Replies 3 ·
Undergrad Can cacao powder sustain shear stresses?
- lightarrow
- · Replies 10 ·
Undergrad Do Both Carbon Atoms in Ethane Rotate During Conformation Changes?
- Karan Punjabi
- · Replies 7 ·
Graduate Are real-life signals infinitely continuous and differentiable?
- RaduAndrei
- · Replies 16 ·
Can quantum theory explain why extraterrestrial life must exist?
- vin300
- · Replies 2 ·
Undergrad Deriving the Equation for Area of a Ring
- Calpalned
- · Replies 3 ·
High School Molecule Size VS Occupied Volume of Gases
- Karan Punjabi
- · Replies 4 ·
News 2015 Nobel Prize in Physics announcement
- Orodruin
- · Replies 34 ·
Graduate Are nodes on a string perfect nulls?
- musichascolors
- · Replies 4 ·
High School Does Gravity Master Accurately Represent Real-Life Physics in Gaming?
- motleycat
- · Replies 1 ·
High School Cathode ray tube- thermionic emission
- Nemika
- · Replies 4 ·
Undergrad How do surface water molecules balance unbalanced forces?
- Karan Punjabi
- · Replies 15 ·
Graduate Cutting force (large astronomical body)
- nicholas0211510
- · Replies 2 ·
Undergrad Any examples of disagreements leading to new knowledge?
- cmkluza
- · Replies 2 ·
Graduate What we mean when we talk of foundations of physics?
- Telemachus
- · Replies 3 ·
High School What is the Definition of Dimension in Mathematics?
- Dimitri655
- · Replies 2 ·
High School Can I replace 2.5A plug with 5A plug?
- sach963
- · Replies 19 ·
Bohemian Gravity String Theory: Queen's Bohemian Rhapsody
- Hornbein
- · Replies 2 ·
Undergrad Linear thermal expansion coefficients of copper from 100–1500K
- Earthland
- · Replies 3 ·
My new dosimeter from a nuclear plant
- JGHarbour
- · Replies 3 ·
High School Do Incandescent Bulbs Flicker at 100Hz or 50Hz?
- houlahound
- · Replies 15 ·
Undergrad What are some open problems in physics that undergraduates can tackle?
- skeer
- · Replies 1 ·
High School The number of lines making equal angles with Co-ordinate axes is ?
- mr_bineet
- · Replies 6 ·
Graduate Physical meaning of operations on physics equations
- Steve Drake
- · Replies 2 ·
Undergrad How is the attraction of a small mass to a bigger mass
- netqwe
- · Replies 19 ·
High School Time and matter, is there a smallest unit?
- mrhoneycinnamo
- · Replies 8 ·
Undergrad Testing a gyroscope torque theory with experimental data
- 24forChromium
- · Replies 4 ·
Who are the top 10 Nobel Prize-winning physicists?
- Ernest S Walton
- · Replies 4 ·
Undergrad Is it possible for cavitation to occur in air?
- Hatrack
- · Replies 3 ·
Undergrad How to find emission peak of emission spectrum
- Yinxiao Li
- · Replies 2 ·
Undergrad Transverse waves moving (a string)
- pyctz
- · Replies 7 ·
Undergrad What is mass fundamentally, beyond its effects?
- yhPscis
- · Replies 95 ·
Undergrad Can a Metal Prince Rupert's Drop Have Similar Properties to Glass?
- 1832vin
- · Replies 2 ·
High School What is the differences between vibration and oscillation
- abi.ayan
- · Replies 4 ·
Graduate Can We Predict Damping Coefficient of a String Using Mathematical Simulation?
- Chrono G. Xay
- · Replies 7 ·
Undergrad Does this equation have the correct units of measurement?
- gracy
- · Replies 11 ·
Undergrad Effect of noise cancelling audio equipment
- CookieSalesman
- · Replies 9 ·
Undergrad The Nernst Equation- I apologize in advance for my ignorance
- Aisling25
- · Replies 1 ·
Graduate How to find the density of states from IV plot.
- Anoop MD
- · Replies 1 ·
Undergrad Selecting Variables for Equation Building - Fastest Observed Velocity of Matter
- samisbored
- · Replies 1 ·
Graduate What instruments can measure electron density in the ionosphere?
- Tone L
- · Replies 1 ·
Undergrad Distance measurements with two cameras
- tiphaine
- · Replies 2 ·
Undergrad Why c is divided while converting cgs into SI system?
- RAFIQ MULLA
- · Replies 4 ·
Undergrad Can a solid sympathetically resonate at a harmonic?
- MauriceWaves
- · Replies 5 ·
Undergrad Why is one significant figure the norm in uncertainties?
- TheCanadian
- · Replies 5 ·
Graduate How Did Bubble Physics Inspire Research on Higher-Dimensional Bubbles?
- klotza
- · Replies 2 ·
Undergrad Are a vector and its derivative perpendicular at all times?
- TheCanadian
- · Replies 2 ·
High School I heard a spin-top in a perfect vacuum would stay spinning
- SciencePerson
- · Replies 9 ·
Graduate Knowledge and ability to explain are not the same skill
- Greg Bernhardt
- · Replies 6 ·
Undergrad Did Stephen Hawking Disprove His PhD Thesis?
- Abishek Balaji
- · Replies 2 ·
Non-Separable Couples: Bell's Theorem Unites
- jk22
- · Replies 3 ·
Helium sky lantern design without flame
- zabrak999
- · Replies 10 ·
Undergrad Rad./sec. * kg*m^2 = kg*m^2/sec. Right?
- 24forChromium
- · Replies 3 ·
High School Resources on one dimensional kinematics
- santos.tomas
- · Replies 2 ·
Undergrad Can two stationary masses repel each other through gravitational forces alone?
- Bob not Alice
- · Replies 5 ·
Undergrad Starburst seen from points of light in night photographs
- MotoMike
- · Replies 4 ·
Undergrad Is Physics the "Liberal Arts of Science?"
- CrystalCaribean
- · Replies 10 ·
High School Physical Interpretation of Integration
- Hamza Abbasi
- · Replies 7 ·
Graduate Vibration Based Energy Harvesting
- HYPETRAIN
- · Replies 20 ·
Undergrad Mercury Vapor Lamp: Why 20-30 Minute Delay?
- gkiverm
- · Replies 2 ·
High School Can You Really Grasp the Concept of the Fourth Dimension?
- Imran Makhdoom
- · Replies 3 ·
High School Why are we allowed to cancel units?
- Mr Davis 97
- · Replies 17 ·
Undergrad Calculating straight-line distance between cities
- Nathanael
- · Replies 6 ·
High School What would we percieve ions as in our eyes?
- Cash Fulton
- · Replies 2 ·
Graduate Decay time of waves in a swimming pool
- avenged*7
- · Replies 3 ·
Undergrad What is stochastic overflow in Carl Sagan's demon-haunted world?
- mabauti
- · Replies 3 ·
Graduate How far does a heated nickel ball sink into ice?
- Borek
- · Replies 2 ·
High School Is the Multiverse So Vast That Anything Can Happen?
- Simtrad
- · Replies 1 ·
High School Where can I find explanations for formula notation and subscripts?
- LeHotDoge
- · Replies 2 ·
Undergrad How inverse square law is derived from area of sphere
- Ebenshap
- · Replies 12 ·
High School What is time? How can we see it?
- yashwanthippili
- · Replies 34 ·
High School Structures: dynamic, complexity, organisation
- El pollito pio
- · Replies 7 ·
Graduate Quantifying the complexity of a system
- BWV
- · Replies 4 ·
Undergrad Why does a soda can gain weight when opened, then lose it as it goes flat?
- ukdiveboy
- · Replies 25 ·
Undergrad What does divergence tell us about vector fields?
- Isaac0427
- · Replies 21 ·
Undergrad Can you calculate a quarter of Earth's circumference using trigonometry?
- marciokoko
- · Replies 11 ·
Graduate Phased directed energy beam emission
- acron
- · Replies 6 ·
Graduate Understanding Normal Modes and Standing Waves in Vibrating Systems
- Raman Choudhary
- · Replies 1 ·
High School What would happen if you went back in time and prevented you
- Jupiter60
- · Replies 2 ·
Insights Plus/minus What? How to Interpret Error Bars - Comments
- Orodruin
- · Replies 20 ·
Why Was Galvani Placed on the Magnetism Branch of the 1932 Physics Map?
- Borg
- · Replies 1 ·
High School Difference between simple harmonic motion and oscillation
- Aishik Rakshit
- · Replies 2 ·
Undergrad What Are the Odds of a Perfect Machine? Perpetual Motion Possibilities
- Ethan_Tab
- · Replies 4 ·
Undergrad Desired properties for a solar cell
- Shivansh Mathur
- · Replies 4 ·
Undergrad What do divergence and curl values represent in vector fields?
- Isaac0427
- · Replies 3 ·
Graduate Muon Spin Rotation and how I got sidetracked into physics
- Jess H. Brewer
- · Replies 16 ·