Does the power required to lift a book depend on how fast you raise it? * O Yes because power depends on work.
O No because power is work regardless of time
O No because power is how strong you are
O Yes because power is work divided by time

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?