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Geophysics is a branch of science that deals with the physical, chemical, geological, astronomical ...

 Introduction to Astronomy The Concept of Astronomy Explain the concept of astronomy Astronomy is ...

Semi Conductors The Concept of Energy Band in Solids Explain the concept of energy ...

Thermionic Emission Thermionic emission is the discharge of electrons from heated materials, widely used ...

he Nucleus of an Atom The Structure of the Nucleus of an Atom Describe ...

Magnetic Fields due to a Current-carrying Conductor How Electric Current Produce a Magnetic Field ...

Introduction to Waves The Concept of Wave Explain the concept of a wave A ...

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