voltmeter
2:14:45
ammeter (Q14 _ Q53)
1:08:01
ch 2 lesson 5(min. deviation & thin prism)
1:12:38
two dimensional projection
53:47
Elementary Differential Equations and Boundary Value Problems شرح ومدارسة كتاب Ch1.2
1:41:55
ch 1 lesson 2 part 7
28:25
Nucléaire: la courbe d'ASTON🤩🤩🤩😱😱😱😍😍😍
1:32:29
ch 1 lesson 3 part 1 (1 _ 30)
46:49