North and middle america have regions with significant risks to natural disasters ranging from tornado alley, hurricane alley, earthquake regions, and volcanic ranges. 1) choose a region from north or middle america that is prone to a natural disaster 2) identify the natural disaster(s) that impact that region 3) describe the process of the natural disasterfs) in terms of how they are formed 4) identify why that region is particularly vulnerable to the natural disasterfs) based on their location, and the processes of the natural disaster formation.

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

Which best describes eras and periods?