A material that conducts electricity is called a... what?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

What is the role of the ocular lens?

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