Light from the sun reaches the earth in 3 min. The speed of light is 3.00x 108 m/s. How far is the earth from the sun ( in km)?

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