state one proof that earth rotates, one proof earth rotates in 24 hours, amd make on observation that proves it revolves around the sun in one year

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which object is most likely represented by a dot?

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