Energy and Human Ambitions on a Finite Planet, 2021a

C Selected Answers 388
Chapter 11
1. Roughly 20 kJ
2. About 10 stories of a building
3. Close to 0.1 kJ
4. About 4 times higher than airliners travel
5. About two-thirds Earth radius
6. Try using half the mass <strong>and</strong> half the energy
7. Cube is roughly as big as height from
ground
8. About 6 times typical nuclear plant
9. Nearly 200 m
10. A little shy of 500 m 3 /s
11. Between 50–75%
12. Roughly 50%
13. About a million homes
14. Approaching 10,000 cubic meters per second
10. Runs approximately 10 kW to 1 MW
11. Roughly two-thirds the original speed
12. Close to 10 MW
13. Closer to 10 m/s than to 15 m/s
14. Almost double freeway speeds
15. Between 5–10 m/s
16. In the ballpark of 70 kW
17. Recover 0.65%
18. Unpack W/m 2 to confirm kg/s 3
19. Outer box area corresponds to running at
100%, full time
20. Definitely less than 50%
21. Looks like a factor of 8
22. Approaching (American) football field
length
23. Approximately 1 MW
24. They may not have equivalent energy
needs
15. You’ve got a little over an hour
16. Less than 1 TW in the end
17. Between 1–2 meters
Chapter 12
1. A few Joules
2. Roughly 1 ◦ C
3. Something like 10 m/s
4. Mass shows up in both mgh <strong>and</strong> 1 2 mv2
5. In the neighborhood of 1,500 m/s
6. About 5–10 humans–worth of mass!
7. Comparable to the height of Mt. Everest
8. Around about 8 times
9. Follow the cube. . .
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