added Coulombs Law functionality to the simulations

[isaacbarker]

No description provided.

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 17.1%, saving 157.29 KB.

Filename	Before	After	Improvement	Visual comparison
imgs/circular-motion-screenshot.png	33.05 KB	31.13 KB	-5.8%	View diff
imgs/dark-transparent.png	205.30 KB	176.21 KB	-14.2%	View diff
imgs/dark.png	171.98 KB	150.90 KB	-12.3%	View diff
imgs/electric-screenshot.png	88.16 KB	46.43 KB	-47.3%	View diff
imgs/ib-logo.png	14.21 KB	6.84 KB	-51.8%	View diff
imgs/light-transparent.png	206.61 KB	177.52 KB	-14.1%	View diff
imgs/light.png	164.39 KB	147.49 KB	-10.3%	View diff
imgs/projectiles-screenshot.png	22.81 KB	17.40 KB	-23.7%	View diff
imgs/snellslaw-screenshot.png	13.93 KB	9.22 KB	-33.8%	View diff

2 images did not require optimisation.

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