For a particle described by l = a) show that if u = e = t + u is constant - = u(i,#), b) show that if u then e is conserved, but it is not necessarily e t+u. ta +t-u(a- ), show that p = pa +p, is conserved. hint: try defining 12. for l new coordinates: x = fg+ i»

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

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Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.