Open a free account to start the full syllabus and interactive lessons — Google or mobile number both work.
Wave speed on a string depends on tension and linear mass density.
Sound is a compression-rarefaction wave; speed set by bulk modulus and density.
Sound travels fastest in solids, slower in liquids, slowest in gases.
Two overlapping waves' displacements add — constructive or destructive interference.
A string fixed at both ends supports a discrete set of resonant modes.
Motion of source or observer shifts the apparent frequency.