318 ELEMENTARY GENERAL SCIENCE 



22. 17 units ; 7 units ; 13 units. 



23. 12-2 units ; 125 nearly. 



24. 65 Ibs. 



25. 3 Ibs., 4 Ibs. 



26. 3P + 4Q, 2P + 3Q. 



27. 5 Ibs. 



28. 63 P. 



29. 53 nearly. 



30. 21-8 units ; 13 '2 units. 



31. HVSlbs. 



32. 15-7 Ibs. 



33. 10 Ibs. 



34. 67 26 Ibs. 



35. 16/v/Slbs., 8 ^3 Ibs. 



37. 5 : 1. 



38. The second by | sec. 



39. 5 ft. per sec. per sec. ; 16 ft. per sec. 



40. 75 : 7. 



41. 5:2. 



42. 2i Ibs. wt. 



43. 7 poundals. 



44. 6J Ibs. wt. ; ^ ft. per sec. per sec. 



45. equal. 



46. 1 : 8. 



47. 96 ft. 



48. (a) 3 ft. per sec. per sec. ; (b) 48 Ibs. 



49. 10J Ibs. wt. 



50. (a) 180 Ibs. wt. ; (b) 160 Ibs. wt. 



51. lOf Ibs. wt. 



52. 95. 



53. 9856 : 3. 



54. 25:11. 



55. 3 ft. per sec. 



56. 9$f ft. per sec. 



57. 8 ft. per sec. 



58. 36 Ibs. 



59. (a) 1600 ; (b) 160. 



60. 321 : 322. 



61. 2 sees. 



62. 3 Ibs. wt. 



63. 10 Ibs. 



64. Magnitude of resultant 5. 

 66. (a) 6 + 5= 11 ; (6)6-5=1. 



CHAPTER VII. 



12. 36'42c.c. ; 7 '55. 



13. 4 63 oz. nearly. 



14. '068 nearly. 



is. T Hr ; ft. 



16. 9800 cub. in. 



