Chapter 19: 7, 14, 19, 25, 37, 47, 61, 61 HW 3 1. A lightning bolt strikes a tree, moving 20.0 C of charge through a potential difference of 1.00*102MV. (a) What energy was dissipated? (b) What mass of water could be raised from 15Csize 12{"15"C} @ to the boiling point and then boiled by this energy? (c) Discuss the damage that could be caused to the tree by the expansion of the boiling steam. 2. What is the strength of the electric field between two parallel conducting plates separated by 1.00 cm and having a potential difference (voltage) between them of 1.50*10* v? 3. The voltage across a membrane forming a cell wall is 80.0 mV and the membrane is 9.00 mm thick. What is the electric field strength? 4. What is the potential 0.530%10" M from a proton (the average distance between the proton and electron in a hydrogen atom)? 5. Sketch the equipotential lines for the two equal positive charges shown in Figure 19.26. Indicate the direction of increasing potential. Figure 19.26 The electric field near two equal positive charges is directed away from each of the charges. 6. Find the charge stored when 5.50 V is applied to an 8.00 pF capacitor. 7. What capacitance is needed to store 3.00 pOsize 12{3 *." "00" mC} { of charge at a voltage of 120 V? 8. Find the total capacitance of the combination of capacitors shown in Figure 19.34. 3.5 HF 075 UP Figure 19.34 A combination of series and parallel connections of capacitors