Problem

silver lake is feed by a clean stream and discharges into the lilla river. new development in the area has led to a plant discharging tetrachlorobiphenyl, a pcb, into the lake. assuming the lake has a constant volume of 8 million m3, what is the steady-state concentration of tetrachlorobiphenyl in the lake assuming the plant discharges its waste at a rate 10 m3/s and the waste stream contains 75 mg/l of tetrachlorobiphenyl? present a complete mass balance solution.

Which are results of technological advances? increased people's exposure to new ideas created a global culture valued by people around the world brought harmony to diverse groups of people reduced the number of people living in rural areas

Look at the data above. provide an explanation for europe’s projected population decrease by the year 2050. (i'm doing this for future kids) the answer is : the percentage of people over the age of 65 and under the age of 15 in europe is currently the same at 16% each. therefore, the majority of the population is between the ages of 16 and 64. in forty years from now, in 2050, a greater percentage of the population will be over the age of 65. europe also has a relatively long life expectancy of 75 years. this, combined with a low birth rate means that by 2050 europe’s population will actually be less than it is today.

Solve for r in the formula v = ir, when i = 5 and v = 15.