Current, Resistance, and Electromotive Force 25. the resistivity of the saltwater solution is determined by the relationship per p (8/8) .m, where s is the salinity in parts per thousand (ppt) and and...

Current, Resistance, and Electromotive Force 25. the resistivity of the saltwater solution is determined by the relationship per p (8/8) .m, where s is the salinity in parts per thousand (ppt) and and 50 = 6.30 ppt. (a) The ammeter registers a current of 484 mA. What is the ma salinity of the saltwater solution? (b) The left cylinder acts as a capacitor. cur Use Eq. (24.19) for its capacitance. How much charge is present on its ins upper plate? Note that pure water has a dielectric constant of 80.4. (c) At ete what rate is energy dissipated by the saltwater? (d) For what salinity level would the 15,0 A resistor dissipate half the power supplied by the battery? the 25.70 .. CP Consider the circuit Figure P25.70 shown in Fig. P25.70. The bat- tery has emf 72.0 V and negligible internal resistance. R2 = 2.00 , C = 3.00 uF, and C2 = 6.00 uF. TE & R2²0, ²2 After the capacitors have attained their final charges, the charge on C is Qi = 18.0 C. What is (a) the final charge on C2; (b) the resistance R,?