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7.A.P.055.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A particular wire has a resistivity of 2.7 x 10 8 0 . m and a cross-sectional area of 4.1 x 10-6 m2. A length of this wire is to be used as a resistor that will develop 49 W of power when connected across a 20-V battery. What length of wire is required? km Need Help? Read It Master It Submit Answer 12. [-/1 Points] DETAILS SERCP11 17.A.P.060. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The current in a conductor varies in time as shown in the figure below. Current (A) 30 20 Time (s) co N 10 12 (a) How many coulombs of charge pass through a cross section of the conductor in the interval from t = 0 to t = 13.0 s? 4 (b) What constant current would transport the same total charge during the 13.0-s interval as does the actual current? 4