Two Ways to Model a Wave Pulse on a String.

I'm still playing with waves on strings. Here is a model based on balls connected by springs (it's a spring-string) and then I make a finite difference. calculation. Here is my whole wave-string playlist. Code for spring-string: https://trinket.io/glowscript/7aa45bb79b code for finite difference https://trinket.io/glowscript/7aa45bb79b The rest of the waves on strings playlist is here https://youtube.com/playlist?list=PLWFlMBumSLSZPer3mCc26CNZtsleV-w90 00:00 - Intro 01:30 - Quick wave equation derivation 04:52 - Checking real string wave speed 05:29 - Review of spring forces 09:32 - Spring model plan 11:01 - code for spring-string 16:04 - Code to measure wave speed 17:24 - Finite difference method 24:30 - Python code for finite difference 27:06 - Comparing velocities