An exceptional standing jump would raise a person 0.79 m off the ground. to do this, what force must a 79 kg person exert against the ground? assume the person crouches a distance of 0.19 m prior to jumping, and thus the upward force has this distance to act over before he leaves the ground.

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

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2