24_Chapter 17 HomeworkCH17 Current and Resistance

24_Chapter 17 HomeworkCH17 Current and Resistance - 92...

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92 CHAPTER 17 17.55 (a) From ( ) VI =∆ , the current is 3 8.00 10 W 667 A 12.0 V I V × == = P (b) The time before the stored energy is depleted is 7 3 3 2.00 10 J 2.50 10 s 8.00 10 J s storage E t × = × × P Thus, the distance traveled is ( )( ) 34 20.0 m s 2.50 5.00 10 m 50.0 km dv t =⋅= × = × = 17.56 The volume of aluminum available is 3 53 33 115 10 kg 4.26 10 m 2.70 10 kg m mass V density × = × × (a) For a cylinder whose height equals the diameter, the volume is 23 44 dd Vd π    and the diameter is () 13 . 2 6 1 0 m 4 0.037 85 m V d ππ  ×  =  The resistance between ends is then
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This document was uploaded on 10/20/2011.

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