5. The Mauna Loa Observatory in Hawaii has been monitoring atmospheric levels of carbon dioxide since 1958. Examine Appendix A, Keeling Curve Graphs. Graphs 1 and 2 represent the data collected at this observatory
over a period of a week and a month. Write down what you notice, if anything, about the concentration of
carbon dioxide.

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?