Two conducting spheres, one with radius 2.00 × 101 cm, the other with radius 8.00 cm, are placed next to each other such that their surfaces are a distance 1.00 × 10−1 m apart. both spheres have a mass of1.00 × 101 mg and the net charge on the two spheres is 7.00 × 101 μc. the 2.00 × 101 cm sphere exerts a 6.23 × 104 mn force on the 8.00 cm sphere.
assuming that both spheres are negatively charged, how many excess electrons are on the sphere with the greatest charge magnitude?

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W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

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Cardiac muscle causes movement in the bone.