In 2004 olympics, shawn crawford ran 200m in 19.79 sec .justin gatlin ran the 100 m race in 9.85 seconds. a) calculate their speeds (round to two decimal places) b) whose speed was faster and by how much

Shawn:

200/19.79 = 10.11m per second

Justin:

100/9.85 = 10.15m per second

10.15-10.11 = 0.04 speed differance

Shawn was faster than Justin by 0.04m per second

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the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

i believe the answer is a hope it and is correct