5 O Chem Fractional Distillation (CC)
26:01
6 O Chem Thin Layer Chromatography (CC)
22:39
4 O Chem Simple Distillation Chem ALL w graphics (CC)
22:59
O Paradoxo da Cúpula: Uma Brecha nas Leis de Newton
15:27
Ferramentas e ideias inovadoras incríveis em torneamento de metal
30:04
7 O Chem Column Chromatography (cc)
24:43
1 O Chem Melting Point ALL with Graphics (CC)
3:08
Danger in Production: Manufacturing Plastic Pellets
13:05