THE LEARNING GOALS FOR THIS CHAPTER ARE:
Know how to use circuit models for inductors and capacitors to calculate voltage, current, and power
Be able to calculate stored energy for capacitors and inductors
Understand the concepts of continuity of current for an inductor and continuity of voltage for a capacitor
Be able to calculate voltages and currents for capacitors and inductors in electric circuits with dc sources
Know how to combine capacitors and inductors in series and parallel
Airport Scanners To be searched or not to be searched is never the question. Air travelers demand security in the skies and today's technology makes it possible with just a 15-to-30 second body scan instead of an intrusive pat-down that can take two to four minutes. Over 99% of airline passengers in major airports across the nation choose to use body scanners when faced with the option. Scanners can spot plastic and ceramic weapons and explosives that evade metal detectors and could eventually replace metal detectors at the nation's 2,000 airport checkpoints.
Most travelers say they welcome any measure that enhances safety, even if it means giving up some privacy. Today's new body scanners depend on millimeter wave technology or backscatter x-ray technology. The first produces an image that resembles a fuzzy photo negative; the second a chalk etching. Millimeter wave technology ...