Advantages of using stem cells
Risk of using stem cells

Pros: Trans differentiate and reprogramming of these cells is possible but is not well studied. Thought to be less likely to be rejected if used in transplants. Success has already been demonstrated in various clinical applications

Cons: Limitations on ASC ability to differentiate are still uncertain; currently thought to be multi or unipotent. Cannot be grown for long periods of time in culture. Usually a very small number in each tissue making them difficult to find and purify. Currently there is no technology available to generate large quantities of stem cells in culture

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