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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 Collimating an extended source to infinity?
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Buoyancy, incompressibility and G forces
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Undergrad Ice patterns on the inside of my windshield
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High School Angle required to hit coordinates x, y, z with air ressitance
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High School Is this mark scheme correct, poorly worded, or wrong?
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Undergrad Gases: Not Required to Be Blackbodies
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High School The Gain of the Inverting Amplifier and Virtual Earth....
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High School Can we truly understand the concept of time?
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High School A New Way to Make Fusion Reactors More Efficient
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High School Tensor Conventions: V^*⊗V^*⊗V (1,2) vs (2,1)
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High School When does an isotope begin to decay?
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Graduate Acceptable Atmosphere for CZ/Float-zone Refining
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High School Are trigonometric ratios physical quantities?
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High School How does sweating cool a person down?
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Undergrad How do three flywheels, one in each axis, behave?
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High School A silly question about why the sky is blue
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Undergrad The component of the total spin in the direction of H
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Undergrad Atmospheric Flow: Meaning & Natural Examples
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Undergrad How to derive Nielsen equation from Lagrange equation?
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Undergrad What is the physical meaning of divergence?
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Why Does a Prism Periscope Focus Light Instead of Scattering It?
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Undergrad Significant Physical/Chemical Change Found by Sign Reversal?
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High School Gravitational force of the Earth and Moon
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High School Gravitational waves for data communication?
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High School Why are we trying to unify all the physical forces?
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Undergrad Finding the Fresnel coefficients from interface conditions
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Undergrad Non-aquaeous expansion medium for a reactor
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Undergrad Complex permitivity of good conductors
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Undergrad Atmospheric Lapse Rate (calculating the altitude of cloud formation)
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Undergrad Can you explain this photo to me?
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High School Simple derivation of the Equations of a Gyroscope
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High School Is the Term Energy Field Misused in Physics?
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High School Rayleigh Interferometer: Impact of Slip Placement on Interference Pattern
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High School What is the equivalent in kg of the force exerted on a plate
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Undergrad Calculating Velocity of a Ball in a Black Hole's Sphere of Influence
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High School Could a Particle Accelerator Create a Black Hole That Destroys Earth?
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High School Could steam be expanded through a nozzle to get 0°C gas?
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Undergrad Intrinsic impedance of a resistor
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Undergrad Isotope clock reset debunks earth's age?
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High School Why there is a difference between same components of 2 paral
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Undergrad Is there a mechanism for creation of negative energy density
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Foundation of the laws of physics
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Can the equations for two retarded potentials satisfy the Lorenz condition?
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Undergrad Direction of E field and propagation of wave in a conductor
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Graduate Symmetry of the permittivity tensor of lossless media
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Undergrad Caculate the reaction force of a radially moving object
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Undergrad Diagram of CO2 dip at 4.3 microns
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High School Question about forces in a gearbox
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Undergrad Back to basics: bubbles in a syringe
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Question About SETI & Time Chauvinism
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High School Is radioactive decay truly random?
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Undergrad Where do I get raw data for plotting Bragg curve?
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High School Gravitational attraction of 2 equal masses
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Undergrad Restricted three body problem (numerical simulation of gravitational attraction)
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High School Energy from the Sun: Is it Dangerous?
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High School Is one side of the Earth faster at night and slower at daytime?
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Undergrad Can a 7.2 Volt Driver Rotate a 300 Pound Weight with Ease?
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High School What Is the First Dimension and Why Is It Considered Nothing?
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High School Additive colour theory and "traditional" colour mixing
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High School What is wrong with gravity equations?
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Undergrad Diffusion & Effusion: What Is It?
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What Are the Best Online Physics Learning Tools and Resources?
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Graduate Free expansion of a real gas vs Joule-Thomson effect
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Undergrad Optimizing Venturi Effect in Hyperboloid Tower Construction
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High School Why did my coffee foam over when I added milk?
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High School Can Black Holes Be Annihilated?
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Undergrad Some questions about toppling of a set of two cylinders
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Graduate Colloidal suspensions, Polymer solutions
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High School Is the Strong Force Really Stronger Than the Electromagnetic Force?
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Undergrad Intuition for why d<p>/dt = -dV(<x>)/dx
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Undergrad Error propagation and standard deviation
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High School So what is the new definition of the kilogram?
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Undergrad Does Planet Mass Affect Orbital Period?
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High School What is the meaning of the famous equation E=mc^2?
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Undergrad How does the inverse square law apply to a focused detector?
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High School Hp/Kw required to move 1.5L/m of diesel fuel at 17.2 Bar?
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Undergrad How accurate are radon detectors?
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Undergrad Is there any theoretical basis for laws being 2nd order
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Undergrad How can I compare different dogs' performance given these values?
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High School Would a smaller fan blade be more efficient?
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High School What is the fundamental nature of matter and energy?
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Is the MRI Signal Highest When Protons Are Coherent or Dephasing?
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Undergrad Phasor Addition Explained - Wave Physics
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High School Find the Perfect 4 Point Probe Head Online - Expert Recommendations
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High School Can a Scalar Operate with a Vector Algebraically?
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Undergrad Problem with gravitation field perpendicular vector.
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High School How to Determine Particle Probability with Constant Linear Momentum?
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High School Is Work the Same as Kinetic Energy?
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Undergrad Print something to be seen in focus by person w/o glasses?
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Undergrad Is a Single Bearing Pedal Possible for Bicycles and Motorcycles?
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2D becomes 3D when looked at by one eye
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Undergrad Understanding Magnetic Domain Walls and Hysteresis Behavior: Can You Help?
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Undergrad Can i create an air flow through a geometry?
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Insights What is the Spectral Paradox Discussed in PF Insights?
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High School How do you make neutral wire 'neutral'?
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High School What easily avaible liquids are transparent in IR?
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High School Is 3-point of H20 used for Kelvin a certain set of isotope
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Undergrad Hooke’s law -- Only valid for small delta-x values?
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High School Is the 'A Level Physics by Roger Muncaster' suitable for 2018/2019 Syllabus?
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High School Calculating tangents from a table
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