3.1 atmospheric steady state a power plant emits a pollutant x to the atmosphere at a constant rate e (kg s? ) starting at time t = 0. x is removed from the atmosphere by chemical reaction with a first-order rate constant k (s). 1. let m be the mass of x in the atmosphere resulting from the power plant emissions. write an equation for m(t). plot your results. what is the steady-state value m? 2. show that the atmospheric lifetime of x is t =1/k. what is the ratio m(t)/m, at time t = t? at time t = 3t?

Which of the following is an accurate description of the recent political history of the democratic republic of the congo? a. religious tensions have escalated into full-scale civil war a number of times since the belgians left the country in 1960. b. the political leader who gained power after the overthrow of a corrupt dictator was assassinated. c. the military leadership felt the country was stable enough, so they permitted democratic elections to take place. d. in 1990, a dictator seized and has held power ever since.