This graph shows the velocity of particles A and B through time. The two lines Intersect each other at point o. What is the acceleration o particles A and particle B at point o?

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