Gina wheels her wheelchair up a ramp using a force of 80 newtons . if the ramp has a mechanical advantage of 7 what is the output force in newtons

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