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| Thread ID: 72268 | 2006-09-06 10:25:00 | Distance between center of earth and Auckland? | Renmoo (66) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 482957 | 2006-09-06 10:25:00 | Any ideas, anyone? I wanted to know it so that I can calculate the gravitational force that we experience here. Yes, some might immediately say it is 9.81 x mass, but 9.81 is just an average, and therefore does not necessary apply to all places. Cheers :) P.S. Some might exclaim "Not another Physics thread again!" |
Renmoo (66) | ||
| 482958 | 2006-09-06 10:30:00 | Closest I can get: en.wikipedia.org Cheers :) |
Renmoo (66) | ||
| 482959 | 2006-09-06 10:47:00 | about 2.4 mm | Metla (12) | ||
| 482960 | 2006-09-06 11:56:00 | Next door. | Greg (193) | ||
| 482961 | 2006-09-06 12:03:00 | Next door. about 2.4 mm Interesting answers, guys. Cheers :) |
Renmoo (66) | ||
| 482962 | 2006-09-06 12:06:00 | it's not that far, just so damn hot down there. worldatlas.com for some stats, main page |
Buff_K (691) | ||
| 482963 | 2006-09-06 12:30:00 | here ya go (seis.natsci.csulb.edu).. You can have a crack at measuring it by using a pendulum. There is a map (en.wikipedia.org) on wikipedia showing variations over Antarctica. It is probably pretty close to 9.81 ... but since Auckland is such a hole ;) |
gibler (49) | ||
| 482964 | 2006-09-07 02:19:00 | James, you'll probably find that the average G is close enough. The distance between the earth and sun varies with the time of year. Even the distance from the centre of the earth varies with time of day too beacuse the earth is not a sphere, and as well the gravitational pull on the rock changes. Rock stretches. ;) The atmospheric pressure depends on the mass of the column of air above you, so that makes a difference too, depending on temperature. If you want an "exact" figure, try the Geology Department of the University. They will have gravity meters. "Gravity map" or "isogal" to google might find something. I didn't spend any time on it but have a look at this Gravity Map of New Zealand (maps.gns.cri.nz/website/gravity/). It might have a way to extract a number. ;) |
Graham L (2) | ||
| 482965 | 2006-09-07 07:18:00 | Hi Graham. Yeah, I know (that 9.81 is good enough), but I always like go for extra mile. Speaking of "G", "G" is the gravitational constant, which carries the value 6.67 x 10^-11, while g is the gravity - that's what my Physics teacher taught me. By using the formula F = GMm / r^2, I found out the gravitational acceleration in Australia to be 9.86 N/kg (c.f. 9.81 N/kg on average) Cheers :) |
Renmoo (66) | ||
| 482966 | 2006-09-07 21:47:00 | Even the distance from the centre of the earth varies with time of day of interest when surveying near an island in the sea my father said that he set the theodlite on a spot on the island and left it there while having his lunch. but his time the tide had risen and the island had sunk 1/2 an inch over the hour. so the earth seems solid but certainly is not |
piersdad (5644) | ||
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