(a) Describe the features that one desires when selecting a fuel cell electrode material. Describe and illustrate both features of electrode structure and properties as well as interactions between the electrodes and other fuel cell components (e. g., reactant gases, electrolyte, product gases, interconnects). Identify some specific electrode materials and why they work well for a (b) PEMFC and (c) SOFC, respectively

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

The energy released by a nuclear fusion reaction is produced when