A diver standing on top of a diving platform that is 20 meters above the pool dives off the platform. Describe the transfer of energy that occurs during
the fall.

Explanation:

When the diver stands on the platform, at 20 m above the surface of the water, he has some gravitational potential energy, which is given as

E =mgh

where m is the man's mass, g is the gravitational acceleration and h is the height above the water. The moment he jumps, the gravitational potential energy starts decreasing, because its height h above the water decreases as well, and he acquires kinetic energy, which is given as

K.E = 1/2mv^2

where v is the velocity of the diver, which is increasing. When he touches the water, all the initial gravitational potential energy has been converted into kinetic energy.

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the miracle worker themeswilliam gibson

themes and meanings

(comprehensive guide to drama)

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there are two central themes in  the miracle worker: that the human spirit can triumph over even the most daunting of disabilities and that a dedicated teacher can transform the lives of those with whom he or she comes into contact. these inspirational themes have long been personified in the widely known true-life relationship between helen keller and annie sullivan, but  the miracle worker  also dramatizes collateral issues that extend beyond the particular case. underlying helen’s process of learning basic principles of what annie terms “obedience” (decorum, etiquette, and hygiene), there are more universal lessons of self-governance—the inculcation of self-restraint instead of willfulness, the development of self-discipline instead of self-indulgence. only when these lessons have been mastered can helen begin to acquire language—which, annie says, “is to the mind more than light is to the eye.”