Here's How Gravity Varies Across Australia And Why You Weigh More In Tasmania Than Queensland
Keen weight-watchers might notice that standing on a set of scales in Tasmania produces a slightly higher reading than in Queensland.
That’s because the Earth isn’t perfectly spherical, so gravity varies ever so slightly around the world.
An Australian-German research team recently combined gravity measurements with satellite data and small-scale topographical models to find that gravity varies by about 0.7%: about 40% larger than previously expected.
That means a 100kg person weighs 700g more near the North Pole, where gravity is 9.83ms-2, than at Peru’s Nevado Huascaran summit, where gravity is 9.76ms-2.
The same person would weigh 200g more in Tasmania than Queensland, where gravity is 9.78ms-2 and 9.805ms-2 respectively.
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http://www.businessinsider.com.au/heres-how-gravity-varies-across-australia-and-why-you-weigh-more-in-tasmania-than-queensland-2013-9
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