A large (industrial-sized) wind power turbine can produce enough electricity
Question
1. A large (industrial-sized) wind power turbine can produce enough electricity to power about 500 homes for a full year. There are approximately 130 million homes in the USA. How many large wind turbines would we have to build in order to provide electricity to half of all homes in the US?
A.
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65,000,000
B.
2,600,000
C.
1,300,000
D.
260,000
E.
130,000
F.
26,000
2. Advocates of algae farming say we may be able to produce 150,000 gallons of algae-oil per acre per year. At that production rate, how many acres of algae farms would it take to produce 50% of the 7.5 billion barrels of oil the US uses each year?
A.
10,500,000 acres
B.
1,050,000 acres
C.
150,000 acres
D.
2,100,000 acres
E.
5,600,000 acres
F.
56,000,000 acres
3. When one U-235 atom is split in a nuclear reactor, it produces 3 neutrons that can each split another U-235 atom, starting a fission chain reaction resembling a pyramid (like the diagram shown in lecture). Assume that every neutron released splits a U-235 atom. If your initial neutron fired into the core represents the 1st step (i.e., the top point) on the chain reaction pyramid, how many neutrons will be released on the 6th step of the pyramid?
A.
6
B.
12
C.
36
D.
108
E.
243
F.
324