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AP® Environmental Science

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Picohydro

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Very small hydroelectric systems can be used to supply power to remote areas with small populations, such as a research station. These systems are called picohydro (named after the metric prefix pico, meaning ${10}^{-12}$).

Consider a research station in the planning stage. Decisions are being made about the structure and use of the picohydro system. The system being built can produce electricity at a rate of 5 kilowatts. The majority of this power will be used for lighting the buildings. The researchers are choosing between 100W incandescent bulbs and 8W LED bulbs.

How many MORE bulbs would they be able to power with the 5 KW, if they chose LED bulbs over incandescent bulbs?

A

460

B

52

C

575

D

92

E

625