You want to pull the magazine 5-th from the top out of a stack of approximately identical magazines, each of mass 289.74 grams. Assuming you manage this without knocking the stack over, what force (in N) would you have to apply to begin pulling the magazine out if the coefficient of static friction between any pair of magazine surfaces is 0.56

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?