The two most important achievements in physics in the 20th century were the discoveries of the theory of relativity and quantum physics. In 1928, Paul Dirac synthesized these two theories and wrote the Dirac equation to describe particles moving close to the speed of light in a quantum mechanical way, and thus initiated the beginning of relativistic quantum mechanics. Graphene, a single atomic layer of graphite discovered only a decade ago, has been providing physicists opportunities to explore an interesting analogy to relativistic quantum mechanics. The unique electronic structure of graphene yields an energy and momentum relation mimicking that of relativistic quantum particles, providing opportunities to explore exotic and exciting science and potential technological applications based on the flat carbon form. In this presentation Professor Kim discuses the brief history of graphene research and its implications in science and technology.
Solving Simple Word Problems are part of the Year 3 Lesson 11 Autumn Solving Word Problems. Children learn how to solve Solving Simple Word Problems and what strategies they need to use to become effective problem solvers. The Solving Simple Word Problems lessons are fun and fast paced. They focus on addition and subtraction problems.
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