PHYS 474 Lecture Notes - Lecture 21: Zinc Sulfide, Electronic Band Structure, Roman Numerals

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You normally drive on the freeway between San Diego and los angles at an average speed of 105 km/h trip take 2h 20 minutes on the Friday afternoon however heavy traffic slowes you down and you drive the same distance at an average speed of only a 70km/h how much does the trip take?

An aluminum wire carrying a current of 6.0 A has a cross-sectional area of 2e-06 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)