1. Origin of the Law of Gravitation 2. Newton’s Law of Universal Gravitation 3. The Gravitational Constant G 4. Gravitation Near the Earth’s surface 5. The Two Shell Theorems 6. Gravitational Potential Energy
Isolated cardiac myocyte in culture undergoing periodic contractions Courtesy of Jan Lammerding Used with permissi Structure of dle mage removed due to copyright considerations
