6.3 - Magnetic Force and Field 6.2 - Electric Force and field 9.4 - Orbital Motion & Kepler's third law 6.1 - Gravitational Force and fields 5.2 - Ammeters, Voltmeters & Potential Dividers 5.2 - Internal Resistance, Power & Combining Resistors 5.1 - Potential Difference, Current & Resistance 10.3 - Entropy and the 2nd law 10.2 - First law of Thermodynamics and PV graphs 10.3 - Second law of thermodynamics