College Physics Chapter 18

P'Cast 18-1 Changing a Sphere
P'Cast 18-2 Electron Drift Speed in a Flashlight
P'Cast 18-3 Stretching a Wire
P'Cast 18-4 Calculating Current
P'Cast 18-5 Resistance of a Potassium Channel
P'Cast 18-6 Giant Axons in Squid
P'Cast 18-7 Giant Axons in Squid Revisited
P'Cast 18-9 Resistors in Combination
P'Cast 18-10 Power in Series and Parallel Circuits

Balloon Art Concept Check Definition of current (18-1)
Balloon Art Concept Check Current and drift speed (18-3)
Balloon Art Concept Check Definition of resistance (18-8)
Balloon Art Concept Check Relationship among potential difference, current, and resistance (18-9)
Balloon Art Concept Check Equivalent resistance of resistors in series (18-11)
Balloon Art Concept Check Equivalent resistance of resistors in parallel (18-20)
Balloon Art Concept Check Electric potential difference related to electric potential energy difference (17-6)
Balloon Art Concept Check Power for a circuit element (18-23)
Balloon Art Concept Check Power for a resistor (18-24)
Balloon Art Concept Check Charge, voltage, and capacitance for a capacitor (17-14)
Balloon Art Concept Check Capacitor charge and current in a charging series RC circuit (18-27)
Balloon Art Concept Check Capacitor charge and current in a discharging series RC circuit (18-30)

Math Tutorial-1 Significant Figures
Math Tutorial-2 Equations
Math Tutorial-3 Direct and Inverse Proportions
Math Tutorial-4 Linear Equations
Math Tutorial-5 Quadratic Equations and Factoring
Math Tutorial-6 Exponents and Logarithms
Math Tutorial-7 Geometry
Math Tutorial-8 Trigonometry
Math Tutorial-9 The Dot Product
Math Tutorial-10 The Cross Product