Show and explain the calculation process to work out the final values, and consider three significant figures. if necessary, use the gas constant, r = 8.31 j k-1 mol-1, the faraday constant, f = 96,500 c mol-1, the temperature, t = 298 k, the planck constant, h = 6.63 x 10-34 j s, and the mass of electron, m = 9.11 x 10-31 kg.

fund 4) consider assembling a tandem photocatalytic water splitting (2h2o → 2h2 + o2) cell. assuming that each photo-induced interfacial reaction requires gibbs free energy difference of < -0.25 ev (δg: < -0.25 ev), select two appropriate semiconductors, and complete the cell assembly. explain how the cell functions. estimate the maximum practical theoretical solar-to-hydrogen (sth) conversion efficiency under am1.5g, one sun condition (100 mw/cm2)

I'm kinda lost ! 1. when marilyn takes her pet dog for a walk, the dog walks at a veryconsistent pace of 0.55 m/s. draw a position-time graph to representmarilyn's dog walking the 19.8 m distance from the front of her house tothe nearest fire hydrant.2. both car a and car bleave school when a stopwatch reads zero. car atravels at a constant 75 km/h, and car b travels at a constant 85 km/h. a) draw a position-time graph showing the motion of both cars. howfar are the two cars from school when the stopwatch reads 2 hrs? calculate the distances and show them on your graph. b) both cars passed a gas station 120 km from the school. when dideach car pass the gas station? calculate the times and show themon your graph.3. the figure below shows the position-time graph showing a shopper'smovement up and down the aisle at a store. a) write a story describing the shopper's movements at the store. b) when does the shopper have a position of 6 m? c) how much time passes between when the shopper enters the aisleand when he gets to a position of 12 m? what is the shopper's averagevelocity between 37 s and 46 s?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

What is the measurement of how fast an object moves relative to a reference point?