Give the use lewis diagrams and show in three steps how aluminium oxide is formed​

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

Explain why electric current cannot exist if a current doesn't have a voltage source.