1. Can living things serve as an indicator of exposure to electromagnetic radiation? Why? 2. Explain the process of electromagnetic radiation.

3. Based on the article, what are some of the advantages that can be given by region frequency and microwaves?

4. How about the disadvantages or the negative effects of EM radiation? Cite some examples.

5. As a conclusion, explain whether EM radiation is beneficial or harmful to the environment and the living things. support their idea by giving some points.

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.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block