Hi, this is my first post on steemit. Let me join great steemit world with you all. You can call me Zack. I'm Physics education student. I'm interested on physics, game development (unity3d) [beginner :) ], android mobile app development[beginner]. O y I'm from Indonesia, the wonderful country. Don't hestiate to say hello or ask simple physics question [just simple :) ]to me, I'm pleased to learn together.