1:19:36

PM8 Magnetic Effects of Electric Current 20Dec2024

1:14:18

Sound 18Dec2024

1:09:52

PM8 Magentic Effects of Electric Current 18Dec2024

1:13:36

PM8 Carbon and its Compounds 11Dec2024

1:04:10

PM5 Carbon and its Compounds 14Dec2024

1:27:43

PM8 Surface Areas and Volumes 09Dec2024

1:13:29

Structure of Atom 11Dec2024

1:10:16

Surface Areas and Volumes 19Dec2024