Thursday, 22 June 2017

Collateral Accounts 2 of 5

Collateral Accounts 2 of 5: http://youtu.be/iu7K4kLk8Vg

Monday, 19 June 2017

Potential Energy of Gravity

23.2 Potential Energy of Gravity near the Surface…: http://youtu.be/ThZH56PUwNc

Sunday, 18 June 2017

Saturday, 17 June 2017

Friday, 16 June 2017

Wednesday, 14 June 2017