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Other Physics Topics Forum

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.

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What exactly does negative permittivity mean?

Apr 20, 2013 · Replies 8 · Jun 9, 2014

Replies: 8

Views: 10K

Why do we still teach Bohrs Model?

Jun 6, 2014 · Replies 10 · Jun 7, 2014

Replies: 10

Views: 4K

What is the significance of the 1/3 factor in the derivation of PV=nRT?

Jun 6, 2014 · Replies 7 · Jun 7, 2014

Replies: 7

Views: 5K

Metric Prefix Help - Find 2mL=200L

Jun 6, 2014 · Replies 14 · Jun 7, 2014

Replies: 14

Views: 3K

What Is Graviton? Understanding Gravity & Matter

Jun 7, 2014 · Replies 2 · Jun 7, 2014

Replies: 2

Views: 2K

What is Physion?

Feb 9, 2011 · Replies 7 · Jun 7, 2014

Replies: 7

Views: 24K

Why energy could be "renewable"?

Jun 4, 2014 · Replies 18 · Jun 6, 2014

Replies: 18

Views: 3K

How can you move a wheel chair sitting on it?

Jun 6, 2014 · Replies 8 · Jun 6, 2014

Replies: 8

Views: 5K

Calculate Rubber Band Force to Hold 5 kg Box Without Deforming >1mm

Jun 5, 2014 · Replies 5 · Jun 6, 2014

Replies: 5

Views: 3K

Does getting sucked up require more energy then getting pushed away?

Jun 3, 2014 · Replies 8 · Jun 6, 2014

Replies: 8

Views: 2K

Why Is Work Calculated Using External Pressure P2 in Gas Expansion?

Jun 4, 2014 · Replies 9 · Jun 5, 2014

Replies: 9

Views: 2K

Is this a valid explanation of why hotter things have more mass?

Jun 5, 2014 · Replies 2 · Jun 5, 2014

Replies: 2

Views: 1K

The Lagrange Mesh Method: An Overview

Jun 2, 2014 · Replies 2 · Jun 5, 2014

Replies: 2

Views: 2K

What is the flow rate through a capillary tube?

Jun 3, 2014 · Replies 2 · Jun 4, 2014

Replies: 2

Views: 3K

What is this formula for?/What is it called?

Jun 1, 2014 · Replies 3 · Jun 4, 2014

Replies: 3

Views: 2K

Fourier transform of an assumed solution to a propagating wave

Jun 3, 2014 · Replies 1 · Jun 4, 2014

Replies: 1

Views: 1K

How hard would it be to output a stable beam if a certain wavelength?

Jun 3, 2014 · Replies 7 · Jun 4, 2014

Replies: 7

Views: 2K

How Do Force and Angles Influence the Physics of Piercings?

Jun 3, 2014 · Replies 3 · Jun 4, 2014

Replies: 3

Views: 3K

I want to build a mini-hoverboard (2" by 8" scale model)

Jun 1, 2014 · Replies 18 · Jun 3, 2014

Replies: 18

Views: 4K

Any real life demonstrations of radioactive decay?

Jun 1, 2014 · Replies 20 · Jun 3, 2014

Replies: 20

Views: 8K

Can mathematics explain everything in our universe?

Jun 3, 2014 · Replies 3 · Jun 3, 2014

Replies: 3

Views: 7K

Question regarding cathodes and anodes

Jun 1, 2014 · Replies 8 · Jun 2, 2014

Replies: 8

Views: 2K

Is it possible to tell whether ship is moving or not?

Jun 1, 2014 · Replies 66 · Jun 1, 2014

3

Replies: 66

Views: 6K

Understanding formulas involving divison and multiplication

Jun 1, 2014 · Replies 4 · Jun 1, 2014

Replies: 4

Views: 2K

Snorkel Breathing: Max Length & Factors Explained

May 30, 2014 · Replies 6 · May 31, 2014

Replies: 6

Views: 3K

Nature of votexes and whirlpools

May 30, 2014 · Replies 2 · May 31, 2014

Replies: 2

Views: 2K

Calculating mass of a solvent in a mixture, given volume and molality?

May 30, 2014 · Replies 1 · May 30, 2014

Replies: 1

Views: 2K

Can someone please explain what the parallel axis theorem is?

May 30, 2014 · Replies 2 · May 30, 2014

Replies: 2

Views: 2K

A body traveling for infinte time

Mar 27, 2014 · Replies 42 · May 29, 2014

2

Replies: 42

Views: 5K

If gravity is geometry then why talk about

May 28, 2014 · Replies 11 · May 29, 2014

Replies: 11

Views: 2K

Creating Matter from Light: How Does It Work?

May 29, 2014 · Replies 11 · May 29, 2014

Replies: 11

Views: 2K

Throwing an object upwards and dropping it

May 28, 2014 · Replies 14 · May 28, 2014

Replies: 14

Views: 8K

Why Does Black Absorb Light Without Reflection in a Dark Room?

May 26, 2014 · Replies 13 · May 28, 2014

Replies: 13

Views: 3K

Why can't amplitude make a tranverse wave faster

May 27, 2014 · Replies 28 · May 28, 2014

Replies: 28

Views: 4K

Is Gravity Instant? A Thought-Provoking Question

May 25, 2014 · Replies 23 · May 28, 2014

Replies: 23

Views: 4K

Degenerate Modes in Photonic Crystal Cavities: Examining Resonant Frequencies

May 22, 2014 · Replies 3 · May 27, 2014

Replies: 3

Views: 3K

Visualizing Dimensional MLT quality

May 27, 2014 · Replies 2 · May 27, 2014

Replies: 2

Views: 2K

Is Determinism Challenged by the Brain's Decision-Making Ability?

May 27, 2014 · Replies 20 · May 27, 2014

Replies: 20

Views: 3K

Is the Fine-Tuning Argument Valid Without Sequential Data?

May 26, 2014 · Replies 2 · May 27, 2014

Replies: 2

Views: 2K

A quick question concerning constants and planck units

May 26, 2014 · Replies 4 · May 26, 2014

Replies: 4

Views: 2K

Why is the Sky Blue? Understanding Rayleigh Scattering and Atmospheric Particles

May 14, 2014 · Replies 23 · May 26, 2014

Replies: 23

Views: 8K

Insulation blocks mobile phone signals

May 24, 2014 · Replies 4 · May 26, 2014

Replies: 4

Views: 4K

Solving Relay Imaging Problem to Get Image at 370mm

May 26, 2014 · Replies 3 · May 26, 2014

Replies: 3

Views: 4K

Interesting Thoughts on Objects & Speed of Light

May 24, 2014 · Replies 5 · May 25, 2014

Replies: 5

Views: 2K

Can Double Slit Experiment Results Differ with Two Separate Light Sources?

May 25, 2014 · Replies 2 · May 25, 2014

Replies: 2

Views: 2K

Poll

What is the Role of Centrifugal Force in the Discus Throw?

May 22, 2014 · Replies 11 · May 25, 2014

Replies: 11

Views: 7K

Understanding Lenz Law: Impact on Current Direction in a Magnetic Field

May 23, 2014 · Replies 10 · May 23, 2014

Replies: 10

Views: 3K

Physics for Engineers: Scalar/Dot Product Explained

May 22, 2014 · Replies 10 · May 23, 2014

Replies: 10

Views: 3K

North American Superconductor Superhighway: Concept and Propulsion Methods

May 22, 2014 · Replies 1 · May 22, 2014

Replies: 1

Views: 1K

Testing IFFT and FIR Filter on FFT Sin Wave Output

May 20, 2014 · Replies 13 · May 22, 2014

Replies: 13

Views: 2K

How does energy convert into mass?

May 21, 2014 · Replies 19 · May 22, 2014

Replies: 19

Views: 3K

Changing Sinewave Frequency: Can it be Done?

May 17, 2014 · Replies 33 · May 20, 2014

2

Replies: 33

Views: 3K

Why do I see stars as a point in the sky?

May 15, 2014 · Replies 13 · May 19, 2014

Replies: 13

Views: 4K

Favorite physics videos on internet

Jul 9, 2011 · Replies 56 · May 19, 2014

2

Replies: 56

Views: 110K

Should objects that are connected share the same physical laws?

May 15, 2014 · Replies 22 · May 19, 2014

Replies: 22

Views: 3K

How to look at stars to go back in time?

May 14, 2014 · Replies 19 · May 19, 2014

Replies: 19

Views: 2K

Create a Vacuum at Home: Easy Tips for Making a Partial Vacuum in a Small Box

May 17, 2014 · Replies 3 · May 18, 2014

Replies: 3

Views: 6K

Concepts simplified through math

May 17, 2014 · Replies 4 · May 18, 2014

Replies: 4

Views: 2K

What Makes a Sliding Book Stop Both Rotating and Translating Simultaneously?

Jan 22, 2014 · Replies 117 · May 18, 2014

4

Replies: 117

Views: 16K

Using UVC Lamps for Banknote Verification: Safety Concerns?

May 17, 2014 · Replies 5 · May 17, 2014

Replies: 5

Views: 3K

Why do several Lie groups have the same Lie algebra when acting on a space?

May 16, 2014 · Replies 6 · May 17, 2014

Replies: 6

Views: 2K

What is the Best Approach for Solving a Fourier Coefficient Problem in MATLAB?

May 13, 2014 · Replies 2 · May 17, 2014

Replies: 2

Views: 2K

Identifying System Equality Across Observers

May 16, 2014 · Replies 1 · May 16, 2014

Replies: 1

Views: 1K

Forces at freely-jointed and freely-hinged

May 16, 2014 · Replies 4 · May 16, 2014

Replies: 4

Views: 7K

Could fluorescence quenching be used for making 3D images?

May 12, 2014 · Replies 6 · May 15, 2014

Replies: 6

Views: 2K

Closed Systems and Isolated Systems

May 13, 2014 · Replies 5 · May 15, 2014

Replies: 5

Views: 6K

Resources for simulations in physics

Apr 21, 2014 · Replies 3 · May 14, 2014

Replies: 3

Views: 5K

Buoyant Force at the bottom of a pool?

May 14, 2014 · Replies 5 · May 14, 2014

Replies: 5

Views: 6K

Measuring Earth's Orbit: Methods and Distortions Explained

May 12, 2014 · Replies 11 · May 14, 2014

Replies: 11

Views: 2K

Calculating Kinetic Energy with E=h*f

May 14, 2014 · Replies 1 · May 14, 2014

Replies: 1

Views: 1K

What is the top solar cells in market?

May 12, 2014 · Replies 1 · May 12, 2014

Replies: 1

Views: 1K

Is gravity a by-product instead of a force of nature itself?

May 12, 2014 · Replies 1 · May 12, 2014

Replies: 1

Views: 3K

Determination of density at a depth in a compressible fluid.

May 10, 2014 · Replies 46 · May 12, 2014

2

Replies: 46

Views: 14K

Base and collector of transistor

May 11, 2014 · Replies 1 · May 11, 2014

Replies: 1

Views: 1K

Atomic Transmutation: Protons and Muon Stability

May 10, 2014 · Replies 13 · May 11, 2014

Replies: 13

Views: 2K

Where in the world do those elctrons go?

May 10, 2014 · Replies 4 · May 11, 2014

Replies: 4

Views: 2K

The beginning for time for beginners

Feb 17, 2014 · Replies 5 · May 10, 2014

Replies: 5

Views: 2K

Unraveling the Meaning of t = 0 in Physics

May 8, 2014 · Replies 11 · May 9, 2014

Replies: 11

Views: 7K

Bel is unit for what physical quantity?

May 9, 2014 · Replies 7 · May 9, 2014

Replies: 7

Views: 9K

Electricity in a Vacuum: Investigating 1e9 Voltage

May 8, 2014 · Replies 7 · May 9, 2014

Replies: 7

Views: 2K

Intuitive meaning of Dot Product

May 8, 2014 · Replies 4 · May 9, 2014

Replies: 4

Views: 5K

A question born from a dispute in a Tabletop Game.

May 7, 2014 · Replies 12 · May 9, 2014

Replies: 12

Views: 2K

What is the 4th dimension n terms of visualization ?

Oct 18, 2013 · Replies 15 · May 9, 2014

Replies: 15

Views: 4K

Potential Drop Across Resistor - Explained

May 8, 2014 · Replies 1 · May 8, 2014

Replies: 1

Views: 2K

What Determines the Straightness of a Line?

May 8, 2014 · Replies 5 · May 8, 2014

Replies: 5

Views: 2K

How does the moon pull on the earth?

May 7, 2014 · Replies 8 · May 8, 2014

Replies: 8

Views: 6K

How does Fermat's Principle follow from Huygen's principle?

May 7, 2014 · Replies 1 · May 8, 2014

Replies: 1

Views: 3K

Why can't energy change abruptly?

Sep 27, 2013 · Replies 6 · May 8, 2014

Replies: 6

Views: 2K

What's so special about resonant Frequencies?

May 7, 2014 · Replies 10 · May 7, 2014

Replies: 10

Views: 2K

Alternative definition of constants

May 7, 2014 · Replies 6 · May 7, 2014

Replies: 6

Views: 1K

What is the relationship between phase and path difference in waves?

May 6, 2014 · Replies 4 · May 7, 2014

Replies: 4

Views: 3K

Q&A: EM Orbits & Tides: Attraction & Repulsion?

May 6, 2014 · Replies 2 · May 7, 2014

Replies: 2

Views: 2K

Vacuum Pump & Setup for 20-25cm Cylinder

May 6, 2014 · Replies 2 · May 6, 2014

Replies: 2

Views: 2K

Is Gravity Really a Pushing Force?

May 4, 2014 · Replies 11 · May 6, 2014

Replies: 11

Views: 5K

Exploring the Limits of Modeling EM Forces as Spatial Curvature

May 6, 2014 · Replies 1 · May 6, 2014

Replies: 1

Views: 1K

Fridge stocked or unstocked - which uses less energy?

May 2, 2014 · Replies 7 · May 6, 2014

Replies: 7

Views: 4K

EMF Induction: How Flux Change Creates Potential

Dec 29, 2013 · Replies 60 · May 5, 2014

3

Replies: 60

Views: 7K

Which Physics Simulation Programs Can I Use to Visualize Complex Phenomena?

Jan 31, 2014 · Replies 13 · May 4, 2014

Replies: 13

Views: 8K

What Are Black Bodies & Why Are Stars Considered Them?

May 4, 2014 · Replies 14 · May 4, 2014

Replies: 14

Views: 3K

Enforce clockwise spinning, but not counterclockwise

May 4, 2014 · Replies 3 · May 4, 2014

Replies: 3

Views: 2K

Physics

Physics is the scientific study of the fundamental principles governing the behavior of matter and energy in the universe. It explores the nature of space, time, motion, forces, and the interactions between particles and fields.

Physicists seek to formulate laws and theories that describe the fundamental forces shaping the cosmos, from the microscopic world of subatomic particles to the vastness of galaxies. Divided into classical and modern physics, the discipline encompasses mechanics, electromagnetism, thermodynamics, quantum mechanics, and relativity.

Physics not only provides a framework for understanding the physical world but also drives technological innovations, shaping our comprehension of reality and inspiring advancements in various scientific and technological domains.

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