Page 35 - Fisika Terapan for Engineers and Scientists

CHAPTER

Conservation

of Energy 8

CONCEPTS IN CONTEXT
Concepts
in
Context The two orange areas in the middle of this satellite image are the reservoirs
of the hydroelectric pumped-storage plant on Brown Mountain in New 8.1 Potential Energy of a
York State. When full, the upper reservoir (at right) holds 19 million cubic Conservative Force
meters of water.This reservoir is linked to the lower reservoir at the base, 8.2 The Curve of
part of the Schoharie Creek, by a 320-m vertical shaft bored through the Potential Energy
mountain. The water flowing out of this shaft drives four large turbines 8.3 Other Forms of Energy
that generate electric power. During periods of low demand, the turbines
8.4 Mass and Energy
are operated in reverse, so they pump water back into the upper reservoir.
With the concepts developed in this chapter we can address questions 8.5 Power
such as:
? How do pumped-storage power plants complement other power
plants? (Physics in Practice: Hydroelectric Pumped Storage, page 242)
? What is the speed of water spurting out of the shaft at the bottom?
(Example 3, page 242)
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