Shock Waves – The Physics Hypertextbook
The shock wave from a supersonic object is a cone composed of overlapping spherical wavefronts. As any one of these wavefronts forms, it propagates radially outward at speed c and acquires a radius ct .
Shock Waves - Problems – The Physics Hypertextbook
When an object travels faster than the speed of sound in a medium, a cone shaped region of high pressure called a shock wave trails behind it.
Flow Regimes - The Physics Hypertextbook
Fluid flow can be broken up into two general regimes by Mach number: those less than Mach 1 are said to be subsonic, while those greater than Mach 1 are said to be supersonic. A body moving through a fluid at speeds less than the speed of sound in the fluid is preceded by a region of gradually varying density and pressure.
Doppler Effect (Sound) - The Physics Hypertextbook
The apparent change in the frequency of a sound wave that occurs when either the source of the sound or the observer is moving is called the doppler effect.
Standing Waves - Resources – The Physics Hypertextbook
Sometimes when you vibrate a string it's possible to generate a wave that doesn't appear to propagate. What you have made is called a standing wave.
Electromagnetism - Resources – The Physics Hypertextbook
The source of all magnetism is moving charge. Currents deep in the Earth gives it a magnetic field. Spinning electrons are why iron bars are magnets.
Isotopes - Summary – The Physics Hypertextbook
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Chemical Potential Energy - Problems - The Physics Hypertextbook
Potential energy is the energy of arrangement. Chemical changes rearrange atoms in molecules. Chemical potential energy is absorbed and released in the process.
Batteries - Problems – The Physics Hypertextbook
The Physics Hypertextbook ©1998–2024 Glenn Elert Author, Illustrator, Webmaster
Electromagnetic Spectrum - Problems - The Physics Hypertextbook
Sound is a longitudinal mechanical wave and radio is a transverse electromagnetic wave. Humans and other animals have organs called ears for receiving sound waves. They do not have organs for receiving radio waves.