Title: Unit 8 Homework Assessment
Course: REEC 120 Sustainability and Renewable Energy > Section: REEC 120 Sustainability and Renewable Energy

Q: In the United States computer backup systems account for __% of all U.S. electrical consumption.

(Hint: See Chapter 11 of SWETHA.)

Q: A desktop computer in standby uses ___W.

Q: If the computer is idle for 12 hours how much power is used in a day?  _______kWh

Q: If it costs $0.12 a kWh. then how much did it cost to run the computer in idle for one day?

Q: What are the four phases of producing an item?

Q: _____  _____  _____ is the energy needed to produce building materials and building constructions.

(Hint: See Chapter H.)