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Appendix E

# Answers to Selected Practice Problems

For every complex question, there is an easy answer—neat, simple and wrong.

H.L. Menchen

## Chapter 1

 1.1 Thickness=19.6 km=12.25 mi. 1.2 Temperature=1075°C, for 25°C surface temperature. 1.3 Temperature difference=630°C. 1.4 Depth=6.9 km. 1.5 Depth=3790 m=12,500 ft. 1.1 (a) Depth=4761 m.

## Chapter 2

 2.1 (a) 14°F/100 ft; 25.5°C/100 m. 2.2 (a) SiO2 (msl): (1) AH-1, 240°C; AH-5, 224°C; AH-26, 229°C. (2) H-4, 257°C; H-6, 246°C. (3) CP-avg., 263°C. (c) Na/K: (1) AH-1, 269°C; AH-5, 245°C; AH-26, 261°C. (2) H-4, 226°C; H-6, 221°C. (3) CP-avg., 292°C. 2.3 (a) Temperature=230°C; (b) 251°C. 2.9 (A) 125°C; fairly reliable. (B) 425°C; unreliable, too large an extrapolation. 2.12 (A) (a) 265.3°C; (b) 254.2°C. (B) 690.0 ppm. (C) The ...

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