2.0 version with enhanced components has been released in Nov 1, 2018! Difficulty: ★★★★★The first and last electronics you touch every morning and before bed? Hopefully not your phone...
2.0 version with upgraded parts has been released in Nov 1, 2018! Difficulty: ★★★★★ (advance level)Remote control (RC) race cars have been THE dream toys for most...
Difficulty: ★★★☆☆pH expresses the acidity or alkalinity of a solution. In this lab challenge, you forensic chemist is on a mission to learn about acids...