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
Graduate How can a zipper MRI artifact be limited to a single line?
- member 664596
- · Replies 4 ·
Undergrad When do waves disperse and why do pulses disperse?
- stephen8686
- · Replies 5 ·
Graduate Your guess (or some ideas) for Nobel 2019
- lukangled
- · Replies 4 ·
High School Does the Earth "really" revolve round the Sun?
- Rohantha W
- · Replies 4 ·
Undergrad What physics knowledge would be required to build a house?
- Psinter
- · Replies 18 ·
Physics for Future Presidents book recommendation
- Avner
- · Replies 7 ·
High School Will graphene become a wonder material for future inventions?
- king123
- · Replies 5 ·
Single Trapped Atom Wins UK Science Photography Prize?
- DennisN
- · Replies 22 ·
Is gravity a result of composition and temperature? Share your thoughts!
- itallcomestoenergy
- · Replies 17 ·
Undergrad Which Science Underpins All Understanding of the Universe?
- itallcomestoenergy
- · Replies 11 ·
High School Do Rocks Absorb and Utilize Solar Energy?
- CocoLegendary
- · Replies 11 ·
Graduate Is computational Physics a hard major?
- MOKHTAR
- · Replies 1 ·
Undergrad Can red blood cells be considered colloids? (soft matter physics)
- Asuratyr
- · Replies 1 ·
High School Do melting ice caps actually raise sea levels?
- solarmidnightrose
- · Replies 11 ·
Photo Contest - MURRAY GELL-MANN (6/8-6/14)
- ZapperZ
- · Replies 7 ·
High School Meaning of: Make everything as simple as possible, but not simpler
- wlcgeek
- · Replies 29 ·
High School Is there any physical quantity having two different units?
- Aaditya Jain
- · Replies 19 ·
Undergrad Why is Density Necessary in the Viscosity Comparison Method?
- thedy
- · Replies 1 ·
High School Physical explanation of eye contact
- stubbe11
- · Replies 6 ·
Graduate Units of Lyapunov time and Lyapunov exponents
- LagrangeEuler
- · Replies 3 ·
High School What is the object's orbital path shown in the image?
- cptolemy
- · Replies 9 ·
How Did Charles Kittel Impact Modern Physics Education?
- member659127
- · Replies 2 ·
Undergrad How do sluice gate and groyne flow relate to free surface flow?
- math04
- · Replies 9 ·
Graduate Wilhelmy plate method: perimeter or twice the perimeter?
- lyhuyen
- · Replies 1 ·
Graduate Who Will Be Awarded the Nobel for QCD Now that Murray Gell-Mann Has Died?
- George Jones
- · Replies 5 ·
News Are We Ready for the New Definition of the Kilogram?
- gleem
- · Replies 3 ·
How do prominent physicists balance outreach with academic positions?
- grand_unifier
- · Replies 2 ·
Graduate Derive a flow rate equation that accounts for the fluid properties?
- brupenney
- · Replies 1 ·
Graduate Steady state Vertical diffusion equation
- Juliousceasor
- · Replies 1 ·
High School Coal and total CO2 emissions in the UK
- mfb
- · Replies 20 ·
Undergrad Deriving capillary rise in paper towel as an ODE
- RagincajunLA
- · Replies 1 ·
Graduate How does Poiseuille's law apply to blood flow and pressure gradients?
- sameeralord
- · Replies 1 ·
Undergrad Could gamma-ray lasers work based on nuclear transitions?
- sophiecentaur
- · Replies 14 ·
Undergrad Tray stuck horizontally in kitchen sink
- aisha072
- · Replies 7 ·
High School Why Does the Effective Period of a Composite Wave Remain Constant?
- roam
- · Replies 50 ·
Undergrad Did bottles of wine truly get recovered from the wreck of the Titanic?
- willym
- · Replies 27 ·
Undergrad How to find the H index of an author using Google Scholar?
- windy miller
- · Replies 4 ·
Graduate What is the Effect of Influx and Efflux in Reynolds Transport Theorem?
- hanson
- · Replies 1 ·
Undergrad Can Raman spectroscopy identify every substance?
- David lopez
- · Replies 4 ·
Getting Physics Lectures on an iPod
- _Mayday_
- · Replies 2 ·
Graduate What defines separability and emergence in physical systems?
- Q_Goest
- · Replies 6 ·
Undergrad Redefining the mass unit by counting particles
- A. Neumaier
- · Replies 6 ·
Undergrad Diffraction grating photos of streetlight spectrum with filters
- Drakkith
- · Replies 5 ·
Undergrad What do λ and S represent in q = λ·S·∪ₓ?
- velfr
- · Replies 3 ·
Undergrad Is mass the same thing as matter or just a measure of it?
- alkaspeltzar
- · Replies 7 ·
Undergrad How Does Reducing Time Intervals Affect Accuracy in Numerical Integration?
- walking
- · Replies 5 ·
Undergrad Atomic shadow imaging technique applied to black holes
- dt101
- · Replies 11 ·
Graduate Research styles in different branches of Physics
- plasmon
- · Replies 3 ·
Graduate A new kind of radio transient: ERBs, by Ali Frolop et al.
- Garth
- · Replies 6 ·
High School Questions Regarding the Fundamental Rules of Error Analysis
- JC2000
- · Replies 10 ·
Undergrad Symmetry of an exponential result from a Fourier transform
- Gama
- · Replies 3 ·
Undergrad How to remove Ethanol from Gasoline?
- gary350
- · Replies 27 ·
News How Did Nobel Laureate David Thouless Impact Physics?
- Mastermind01
- · Replies 2 ·
Undergrad Ionosphere: Causes of Electron Production & Recombination Reaction
- Nusc
- · Replies 2 ·
High School History of the term "square-cube law?"
- The Bill
- · Replies 8 ·
High School What are the scientific limits of cymatics?
- sebwild
- · Replies 7 ·
March 14 coming (Einstein, Hawking, Pi-Day)
- robphy
- · Replies 17 ·
Undergrad Why Does Subtractive Cancellation Affect Measurement Precision?
- Roger Dodger
- · Replies 1 ·
Graduate How we can explain our process of thinking by physics?
- dip das
- · Replies 3 ·
High School How to find vernier caliper least count when only a reading is given
- nineteen
- · Replies 4 ·
High School How Can I Measure Lumen, Efficiency, and Color Temperature of a Street Lamp?
- Lisun
- · Replies 3 ·
High School What Are the Dimensions of kWh?
- nineteen
- · Replies 3 ·
Undergrad Analytical Open Channel Rectangular Fluid Flow
- blizzardof96
- · Replies 1 ·
High School What Happens to Volume Change Ratio in Caesium When Pressure Exceeds 1.6 GPa?
- Fitz Watson
- · Replies 5 ·
High School Why isn't plasma listed as a phase of matter?
- Demirci Kawa
- · Replies 19 ·
High School Time reversion (pop science show)
- benorin
- · Replies 1 ·
High School Number Precision When Adding/Subtracting
- Raschedian
- · Replies 8 ·
Photo Contest - Magnetism (3/2-3/8)
- ZapperZ
- · Replies 31 ·
High School Why is the height of a liquid not affected by the radius of a U-Shaped tube
- AmirWG
- · Replies 16 ·
CERN's Next Mega Collider - A live event from the RI
- Wrichik Basu
- · Replies 3 ·
Undergrad Who Was Wolfgang Rindler and What Was His Impact on Cosmology?
- George Jones
- · Replies 3 ·
Undergrad Why did my bicycle speed increase on smooth pavement while coasting downhill?
- Tom Kunich
- · Replies 19 ·
Graduate David Kaplan lecture on Particles and the Nature of Nothing
- DennisN
- · Replies 1 ·
Graduate Importance of uncertainty and probability in research papers
- Zack K
- · Replies 3 ·
High School What a Shame we can't cite from popular sources
- .Scott
- · Replies 8 ·
Name of a scientist who introduced many words into English?
- fluidistic
- · Replies 13 ·
High School Irradiance: difference between distance and the square of the distance?
- otterandseal1
- · Replies 16 ·
Undergrad How to change the color of an LED?
- Jackie1
- · Replies 36 ·
News What do theoretical physicists do?
- George Keeling
- · Replies 8 ·
Undergrad Pixels Per Inch Calculation Paradox?
- aneikei
- · Replies 14 ·
High School What does the symbol ± mean in scientific measurements?
- Kendo
- · Replies 5 ·
Undergrad Can anything be measured with a single measurement?
- Jeff Root
- · Replies 26 ·
Undergrad What is the opposite of light in the balance of nature?
- pinestone
- · Replies 36 ·
Undergrad Papers with fewer authors are more disruptive
- gleem
- · Replies 2 ·
High School Solving the differential equation m(dv/dt)=mg-bv^n
- Opressor
- · Replies 4 ·
Undergrad Indirect Airflow for Safe Extraction of Hydrogen from Lead-Acid Battery Room
- somephy
- · Replies 4 ·
Do you think Tau Ceti e is inhabited?
- alberto91
- · Replies 1 ·
What Type of Physics is Mentioned in This Italian TV Series?
- Adam197
- · Replies 10 ·
High School Why does time only move forward and not backwards?
- Tech2025
- · Replies 33 ·
Undergrad Trying to better understand what viscosity really is
- caltrop
- · Replies 9 ·
Undergrad Does Fermat's principle of least time imply backwards causality?
- fando1234
- · Replies 6 ·
High School Recreation of Famous Japanese Rogue Wave
- jedishrfu
- · Replies 41 ·
High School Solid angle by placing one disk on a cylinder
- Shams
- · Replies 1 ·
High School Quartz vs. Glass -- why do they have different melting points?
- Edge5
- · Replies 4 ·
Undergrad Tipler/Mosca significant figures
- walking
- · Replies 3 ·
Graduate Naturalness: dimensionless ratios
- Auto-Didact
- · Replies 33 ·
High School Is this mark scheme correct, poorly worded, or wrong?
- Elbow_Patches
- · Replies 18 ·
News RIP Roy Glauber - 2006 Nobel Laureate in Physics
- TeethWhitener
- · Replies 2 ·
Graduate Acceptable Atmosphere for CZ/Float-zone Refining
- Patrick Underwood
- · Replies 1 ·
High School Are trigonometric ratios physical quantities?
- Suyogya
- · Replies 3 ·