1)convex mirror/concave mirror
2)pressure of gas
3)mechanical model of a gas
4)stationary wave
5)principle of moments
6)關於力學的effort+efficiency+energy(例如你用spanner去turn a nut,係effort/efficiency/energy方面有咩改變)
呢6個topic 係唔係out c ga?
更新1:
08 CE Physics
更新2:
仲有第7個topic 7)logic gate