Ajet travels 3624 mi against the wind in 6 hours and 4764 with the wind in the same amount of time. what is the rate of the jet in still air and what is the rate of the wind?

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?