EVR 1001 chapter 16- Questions and Answers 100% Solved
1. 5 million pounds How much uranium oxide did the United States produce in 2005?
2. 1980 In what year did uranium oxide production peak in the United States?
3. 45 million pounds What was the net amount of uranium imported into the United States in 2005?
4. Domestic produc- Describe the trends in uranium oxide domestic production from the peak
tion declined dra- production year to 2005.
matically.
5. decrease domestic If current trends continue, the United States is likely to
production and in-
crease imports and
exports.
6. 4,440 kWh per year Based on the yearly average values, calculate one person's residential electricity
needs for a year.
7. 1,560 kWh per year Based on the yearly average values, calculate the solar radiation per square
meter for one year.
8. 28.5 m2 Assume that photovoltaic conversion of solar energy has 10% eflciency. Calcu-
late how many square meters of photovoltaic cells would be needed to supply
one person's electricity for the year, based on the yearly average values.
9. 7.12 m2 If eflciency of photovoltaic cells improves to 40%, how many square meters of
photovoltaic cells would be needed for one person's yearly electricity use?
10. 12.5 years Commercially available household photovoltaic systems cost approximately
$20,000. The average cost of electricity in the United States is approximately
$0.09 per kilowatt hour. At these prices how long would it take for the pho-
tovoltaic system to generate $20,000 of electricity? Assume the system will
produce enough kilowatt hours for a four-person household in Topeka, Kansas.
1/8
, EVR 1001 chapter 16- Questions and Answers 100% Solved
11. Almost all rivers Why is there little to no growth expected for hydropower?
that can be
dammed for pow-
er generation have
been dammed al-
ready.
12. The volume of wa- strongly influences the amount of energy generated from hy-
ter released and the dropower.
height of the fall
13. split molecules The first stage in generating power from a hydrogen fuel cell is to .
of hydrogen gas
(H2H2) into hydro-
gen ions (H+H+)
and electrons
14. It is extremely ener- What is the basis for the use of hydrogen fuel cells?
gy-efficient.
15. using heat-absorb- Which of the following methods would be considered a type of passive solar
ing construction energy collection?
materials
16. produces no ex- Compared to the use of fossil fuels for generating electricity, wind energy
haust pollutants .
and contributes lit-
tle to global climate
change
17. solar; photosynthe- Ultimately, all biofuels are , because they are the product of
sis .
2/8
1. 5 million pounds How much uranium oxide did the United States produce in 2005?
2. 1980 In what year did uranium oxide production peak in the United States?
3. 45 million pounds What was the net amount of uranium imported into the United States in 2005?
4. Domestic produc- Describe the trends in uranium oxide domestic production from the peak
tion declined dra- production year to 2005.
matically.
5. decrease domestic If current trends continue, the United States is likely to
production and in-
crease imports and
exports.
6. 4,440 kWh per year Based on the yearly average values, calculate one person's residential electricity
needs for a year.
7. 1,560 kWh per year Based on the yearly average values, calculate the solar radiation per square
meter for one year.
8. 28.5 m2 Assume that photovoltaic conversion of solar energy has 10% eflciency. Calcu-
late how many square meters of photovoltaic cells would be needed to supply
one person's electricity for the year, based on the yearly average values.
9. 7.12 m2 If eflciency of photovoltaic cells improves to 40%, how many square meters of
photovoltaic cells would be needed for one person's yearly electricity use?
10. 12.5 years Commercially available household photovoltaic systems cost approximately
$20,000. The average cost of electricity in the United States is approximately
$0.09 per kilowatt hour. At these prices how long would it take for the pho-
tovoltaic system to generate $20,000 of electricity? Assume the system will
produce enough kilowatt hours for a four-person household in Topeka, Kansas.
1/8
, EVR 1001 chapter 16- Questions and Answers 100% Solved
11. Almost all rivers Why is there little to no growth expected for hydropower?
that can be
dammed for pow-
er generation have
been dammed al-
ready.
12. The volume of wa- strongly influences the amount of energy generated from hy-
ter released and the dropower.
height of the fall
13. split molecules The first stage in generating power from a hydrogen fuel cell is to .
of hydrogen gas
(H2H2) into hydro-
gen ions (H+H+)
and electrons
14. It is extremely ener- What is the basis for the use of hydrogen fuel cells?
gy-efficient.
15. using heat-absorb- Which of the following methods would be considered a type of passive solar
ing construction energy collection?
materials
16. produces no ex- Compared to the use of fossil fuels for generating electricity, wind energy
haust pollutants .
and contributes lit-
tle to global climate
change
17. solar; photosynthe- Ultimately, all biofuels are , because they are the product of
sis .
2/8
