Lesson
Lesson-18.1.1- use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s), newton/kilogram (N/kg).
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Lesson-17.1.6- know that fusion is the energy source for stars. explain why nuclear fusion does not happen at low temperatures and pressures, due to electrostatic repulsion of protons.PreviousLesson-18.1.2- know that: ??? the universe is a large collection of billions of galaxies ??? a galaxy is a large collection of billions of stars ??? our solar system is in the Milky Way galaxy.Next