Now consider a third cube, scaled up by a factor of 3 so it is 3 cm x 3 cm x 3 cm. a. What is its total surface area? b. What is its volume? c. What is its ratio of surface area to volume? surface area -----= volume

PHY 184 Week 9 Notes-Magnetic Fields & Electromagnetic Induction 10/24-10/27 Moving charges produce a magnetic field o The Biot-Savart Law establishes this relation Wires produce a magnetic field o Can be seen by a compass near the wires μ d B= 0 ids×^ ⏞= ⃗ o 4π r2 ; r μ0 is the magnetic permeability...