Physics Forums Insights
  • Physics
    • Mechanics
    • Thermodynamics
    • Electromagnetism
    • Fluids
    • Optics
    • Particles
    • Quantum
    • Relativity
    • Biophysics
  • Astronomy
    • Astrophysics
    • Cosmology
    • Observing
  • Mathematics
    • Algebra
    • Analysis
    • Geometry
    • Number Theory
    • Probability
  • Computing
    • Programming
    • Electronics
    • Imaging
  • Science Culture
    • Education
    • Careers
    • Philosophy
    • Profiles
    • Trivia
  • Forums
  • Click to open the search input field Click to open the search input field Search
  • Menu Menu

Speed of Sound Articles

Tag Archive for: speed of sound

speed of sound

Direct Echo-Based Measurement of the Speed of Sound

June 28, 2018
/
42 Comments
Figure 1: Distance vs. time a firecracker report echoed off of a building at different distances on both a cold and a warm day.Introduction The…
https://www.physicsforums.com/insights/wp-content/uploads/2018/06/speedofsound2-1.png 135 240 Dr. Courtney https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Dr. Courtney2018-06-28 15:56:312026-02-16 22:05:38Direct Echo-Based Measurement of the Speed of Sound
lightspeedrod

Why a Rigid Rod Can’t Send Faster-Than-Light Signals

September 25, 2015
/
52 Comments
A perfectly rigid rod cannot send faster-than-light (FTL) signals because no such rod exists. Every real material transmits mechanical disturbances at…
https://www.physicsforums.com/insights/wp-content/uploads/2015/09/lightspeedrod.png 135 240 Multiple_Authors https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Multiple_Authors2015-09-25 13:32:072026-07-31 10:51:52Why a Rigid Rod Can’t Send Faster-Than-Light Signals

Popular Articles

  • Blockworld and Its Foundational Implications: Time Dilation and Length Contraction
  • How PET Scans Work: Positrons in Medical Imaging Explained
  • Inflationary Misconceptions and the Basics of Cosmological Horizons
  • Calculate Sgr A* Spin from QPOs — Kerr Metric Derivation
  • Can We See an Atom?
  • Animal Speed Scaling: Body-Lengths per Second Across Sizes
  • The Balloon Analogy Explained: Cosmic Expansion Without a Center
  • Potential Energy Explained: Formulas, Units & Derivations
  • Richard Feynman Quiz: Test Your Knowledge of the Physicist
  • Oppenheimer-Snyder Model of Gravitational Collapse: Mathematical Details

Physics Forums

  • Classical Physics
  • Atomic and Condensed Matter
  • Quantum Physics
  • Special and General Relativity
  • Beyond the Standard Model
  • High Energy, Nuclear, Particle Physics
  • Astronomy and Astrophysics
  • Cosmology
  • Other Physics Topics

Receive Insights Articles to Your Inbox

Enter your email address:

Blog Information

  • Become a Member!
  • Write for Us!
  • Table of Contents
  • Blog Author List

Popular Topics

black holes (23) classical physics (35) education (23) FAQ (58) General (230) general relativity (23) Graduate (185) gravity (25) Guide (86) interview (49) mathematics (39) mathematics self-study (21) Physicist (26) Quantum Field Theory (34) quantum mechanics (36) quantum physics (24) relativity (40) Special Relativity (22) Tutorial (147) Undergraduate (287)
2026 © Physics Forums, ALL RIGHTS RESERVED - Contact Us - Privacy Policy - About PF Insights
  • Link to X
  • Link to Facebook
  • Link to LinkedIn
Scroll to top Scroll to top Scroll to top