College Physics Chapter 20

P'Cast 20-2 Changing Magnetic Flux II A Varying Magnetic Field
P'Cast 20-3 Lighting the Gym with a Bicycle

Balloon Art Concept Check Magnetic flux (20-1)
Balloon Art Concept Check Faraday's law of induction (20-2)
Balloon Art Concept Check Faraday's law and Lenz's law for induction (20-3)
Balloon Art Concept Check Emf in an ac generator (20-7)

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