Sally Ride was the first female US astronaut to travel into space on the Challenger. On that same mission, she also became the first female to do what? six consecutive somersaults inside a spacecraft
walk on the top of the space craft with no space shoes
promote Soviet science and eventually became involved in Soviet politics
operate the shuttle’s robotic arm during her work on launching the satellites

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?