- 12. Which of the following statements is correct with respect to an inert electrode? a. An inert electrode will gain mass. b. An inert electrode will lose mass. c. The mass of an inert electrode will always remain constant. d. An inert electrode will either lose mass or gain mass, depending on the other half-cell reaction. e. All galvanic cells require the use of an inert electrode. 13. Which statement best describes the difference between a galvanic cell and a battery? a. A battery is a set of galvanic cells connected in series to each other. b. A battery is a set of galvanic cells connected in parallel to each other. c. A galvanic cell is a set of batteries connected in series to each other. d. A galvanic cell is a set of batteries connected in parallel to each other. e. There is no difference between the two terms. 14. In cathodic protection what happens to the metal that is the sacrificial anode? a. It is oxidized. b. It is reduced. c. It is either oxidized or reduced, based on the metal it is designed to protect. d. It is neither oxidized nor reduced; it just coats the metal it is designed to protect. e. It is oxidized and reduced at the same time. Answer the questions below. 15. A D-size dry cell flashlight battery is much bigger than a AAA-size dry cell calculator battery, as shown in the photograph below. However,both batteries have cell potentials of 1.5 V. Do the two batteries supply the same amount of charge?Explain your answer.
- The gauge is the diameter of a needle. True False
- Which object listed below has the greatest momentum? 04 kg object rolling at 2 m/s A 0.05 kg rolling at A 0.15 kg object rolling at 1 m/s 015 kg object ct rolling at 2 m/s
- A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river.What is the gravitationa l potential energy of the rock when measured from the surface of the river? What is the gravitationa potential energy when measured from the edge of the bridge?
- D) x=0.342m E) x=-0.218m 9) A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20N/m If the amplitude of this motion is 030 m, what is the kinetic energy of the ball when it is 0.30 m from its equilibrium position? 0.00J B) 0.22 J C) 0.45 J D) 0.90 J E) 1.4 J
