ANSWERS TO "TEST YOUR KNOWLEDGE" ON PAGE 38
Substituting (5) into (2): 4dx
From the figure above we see that R2 = x2 + r2. Therefore: r2 = R2 – x2
Substituting (7) into (6): 2 – x2)2dx
The moment of inertia (I) is then (through integration): 2 – x2)2dx
(6) (7) (8) (9)
Since the above integral is from x = R to x = -R then throughout the entire interval equation (9) becomes: 5
(10)
3]
Substituting (11) into (10): I = (2/5) MR2
(11) (12)
Equation (12) is the moment of inertia for a solid sphere. For the Earth, we substitute into (12) the values for the mass and radius of the Earth (Me = 5.97 * 1024 kg and Re = 6.371 * 106 m, respectively). These yields: Ie = 9.7 * 1037 kg m2
(13) Equation (13) gives us the answer to our question.
Ability to Continue to Accept and Implement Projects
By Michael C. Mound, Ph.D., CPG-03195
As a long-term member of AIPG, I have, with many other colleagues, suffered both professionally and personally as to an interruption in my income stream and my ability to conduct necessary procedures. I have, as my major Income source, to act as a PQ for preparing and defining the requirements of the CIM originated NI 43-101 Best Practices for prospective and active clients. Evaluations are focused on being on site and inspection of procedures that will allow for the defining of a well-researched and written final report. This means travel to the area, supervision of sampling practices, curation, preparation, mixture of acceptable procedures, training or/ and advising the workers and collectors as to the best proofs of resources and reserves.
Mostly, of course, is the valuation and confirmation of all aspects as to drilling, environment, choice of laboratory confirmations, preservation of mine property storage, writing logs, field overall practices, and assurances of success as to the ultimate worth of the property in question.
www.aipg.org
The COVID pandemic has affected the almost completely inability to present a “bulletproof” report with all aspects hav- ing been addressed and easily reviewed. Environmental issues and their aspects are sufficiently difficult to confirm within a constantly shifting employee base at a given mine property, experienced drilling companies, steady and reliable contrac- tors, and uninterrupted and efficiency factors relating to all groups involved. Travel, availability, laboratory personnel, etc. are all so fluid, it has affected satisfactory stewardship of the efforts, and would appear to be more complicated with time to rebuild trust and reliable partners and teams.
It is my hope, along with many colleagues, that we will soon be back to the principles of good practices in our endeavors sooner rather than later. In fact, there seems to be an awak- ening in this regard, which many of us beginning to feel some real signs of relief from the last two years of chaos.
Let us have hope for continued improvements; I have had a few new clients and projects. Good luck to all.
Oct.Nov.Dec 2022 • TPG 41
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56
