Exercises 18.2, page 507

  1. 1. C = kd ,  k = π

  2. 3. 667 Hz

  3. 5. v = kr

  4. 7. R = kd2

  5. 9. P = kA

  6. 11. S = kwd3

  7. 13. A varies directly as the square of r.

  8. 15. f varies directly as L and inversely as the square root of m.

  9. 17. V = 3H2

  10. 19. p = 16qr3

  11. 21. 125

  12. 23. 19.3

  13. 25. 1800

  14. 27. 2.56 × 105

  15. 29. A = k1x ,  B = k2x ;  A + B = (k1 + k2)x

  16. 31. 34,200 kW

  17. 33. 209 kJ

  18. 35. halved

  19. 37. 2.40 in.

  20. 39. 560 kJ

  21. 41. 1.4 h

  22. 43.

    1. Inverse

    2. a = 60/m

  23. 45. 10,200 hp

  24. 47. F = 0.00523Av2

  25. 49. 0.536 N

  26. 51. 480 m/s

  27. 53. R = (4.44 × 10 − 5)lA

  28. 55.

    1. p = kT

    2. 265 kPa

  29. 57. 80.0 W

  30. 59. G = (5.9 × 104)d2λ2

  31. 61.  − 6.57 ft / s2

  32. 63. 0.288 W/m2

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