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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.
Undergrad Is it possible to use the vacuum to launch a rocket?
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Undergrad 2 sign questions related to the wave equation
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Undergrad Understanding of gravity in the Middle Ages
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Undergrad Is it physically possible to climb up a building like this?
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Undergrad If a rock fell 20,000 meters to Earth Question
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Undergrad Splitting force vectors into components
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Undergrad Does the Poisson Equation Have a Unique Solution with Mixed Boundary Conditions?
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Undergrad Can a bicycle be tipped over by only applying rear brake?
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Undergrad Ferrite Rod Antenna: Understanding How It Works
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Undergrad Divergence of ##\frac {1} {r^2} \hat r##
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Undergrad Can Physics Laws Exist in Different Dimensions?
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Undergrad Matter density on the bottom of a liquid container vs hanging in the middle of it
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Undergrad How to write measured value with error
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Undergrad Could tide-powered buoyancy be a viable source of energy?
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Undergrad Having a hard time remembering what this equation is
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Undergrad Check invariance under time-reversal?
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Undergrad How Does Helmholtz Free Energy Change During Constant Temperature and Volume?
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Undergrad Calculate Pressure Needed to Move Grease
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Undergrad What is the difference between Mach cone and shock wave in aerodynamics?
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Undergrad Probability & Time: Is There a Connection?
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Undergrad Unclear on interpretation of equation - oscillation maybe?
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Undergrad Incoherent Waves: Interference Possible?
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Undergrad Force That Binds Atoms: H2, Electromagnetic Force?
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Undergrad Combination sink/source in one object
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Undergrad Confusion between adiabatic and energy
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Undergrad What Are Fascinating Examples of Emergence for a School Project?
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Undergrad Error in the average of same-value measures
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Undergrad A question about a Feynman Diagram
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Undergrad Rope ladder -- How to be able to cast it long distances?
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Undergrad In PET scanners, why is a cyclotron used to make positrons?
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Undergrad Discovering the Science Behind Sucking Up Spaghetti | Ray Vickson
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Undergrad Can You Really Build a Cyclotron for $17?
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Undergrad Hamiltonian of a Physical Theory: Lagrangian vs Transformation
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Undergrad Typographical question: the section sign
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Undergrad Finding Real and Imaginary Parts of the complex wave number
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Undergrad Why is the 'TS term' included in the expression for Gibbs free energy?
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Undergrad What causes disturbance on my phone camera?
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Undergrad Is Energy Partially Spent on State Change Below 100°C?
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Undergrad Is There an Absolute Maximum Density for Substances?
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Undergrad How can an object tip and slip at the same time?
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Undergrad Is it possible for airplane radars to scan minefields?
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Undergrad Experimentally measure gravitational force
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Undergrad Why there's No Unified Theory ?
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Undergrad How 'big' is the present moment in terms of time?
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Undergrad Overview of General Fresnel Equations + Complex IORs
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Undergrad Where is a contact force labeled on a diagram of a pivoted beam?
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Undergrad Centre of Gravity: How Can This Be Possible?
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Undergrad Negative Kelvin? How Is It Possible?
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Undergrad What is the formal definition of a Universality Class?
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Undergrad CMB and the reference point for vacuum energy
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Undergrad Density Siphoning? Solve Problem Now
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Undergrad Experimental Demonstration of the Raman - Nath Effect
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Undergrad What's the restoring force, if there's a mass on a string.
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Undergrad Designing a Car with Multiple Boxes: Free Body Diagrams
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Undergrad Does anyone know about furnaces?
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Undergrad Does Pressure Multiplied by Volume and Volumetric Flow Rate Equal Force?
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Undergrad Can Infinitesimal Volumes Be Arbitrary Shapes?
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Undergrad Formulas describing fluid viscosity/compress-ability
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Undergrad What Are Higher Rank Tensors and When Should You Use Matrices in Physics?
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Undergrad Interpretation of complex wave number
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Undergrad What Are the Best Resources to Understand Resonant Tunneling Diodes?
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Undergrad Fluid flow through a pipe constriction - what would you feel
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Undergrad Opening a Jar: Physics Behind Jar Lid's Resistance to Opening
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Undergrad Ion Conductors: Comparing Resistance to Copper at Room Temperature
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Undergrad How to approach a more perfect blackbody?
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Undergrad Does conductivity of one metal impose limitations on another
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Undergrad Stream inside paraffin oil when exposed to high volage
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Undergrad Is this book correct regarding waves in even dimensions?
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Undergrad Scale Factors: Is a 10x Bigger Earth Possible?
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Undergrad How to Calculate Fall Duration with Variable Force?
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Undergrad Blower/Fan Curve Basics & Questions
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Undergrad How does time add up to 1 second with infinite smaller amounts of time?
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Undergrad How can I prove that P2 = density* g H
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Undergrad Does the open area of my window make a difference?
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Undergrad Is the Output of a Half Wave Rectifier AC Current?
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Undergrad Air Breakdown With 980nm Laser: 1microsec/250mW
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Undergrad Energy transfer during uphill vs downhill running
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Undergrad Critical value of homoclinic bifurcation
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Undergrad How do I name a generalisation of the wave equation?
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Undergrad How is TE selected as long or short?
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Undergrad Solve Velocity Equation: -g(horizontal distance)/sin(2theta)
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Undergrad Uncertainties and significant figures
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Undergrad Can someone explain this Energy Problem
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Undergrad Processes that determine the color of fire
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Undergrad Error Propagation (Percentage) - sin(x)^2 / x^2
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Undergrad Stress Strain Curve: How Is It Derived & Tested?
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Undergrad Define inner product of vector fields EM
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Undergrad Solar cooker pots -- Does their color matter?
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Undergrad Compressed Nitrogen: Calculating Pipe Flow Time
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Undergrad Invariance of the laws of physics
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Undergrad Why Isn't My OLED Screen Image at Infinity in My HUD Setup?
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Undergrad Are Dimensions Real? | Questioning Space Dimensions
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Undergrad Measuring Thickness and Refractive Index with Fourier Domain OCT
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Undergrad What is "unitary evolution" of something in physics?
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Undergrad Self balancing stick based on flywheels
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Undergrad Calculating the rate of rise of air
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Undergrad Another butterfly making tornadoes thread
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Undergrad How fast do you need to cycle to simulate bicycle tire inflation
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Undergrad Why drop the vibrational ground state energy
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Undergrad Evaporation under vacuum; surface area
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