it only explains why gravity varies by altitude, and not why it varies from place to place even at sea level.
I tried this earlier in this thread, the only responses were inane ones like: "Variations in test equipment".
From the little I have read the Einstein's "Equivalence Theory" can only be applied over a region of space and time where "g" is constant.
This is clearly not true for the whole surface area of the earth.We find that at sea level "g" varies from about 9.780 m/s
2 at the Equator to to about 9.832 m/s
2 at the poles - only about 0.5%, but quite measurable.
Also an increase in altitude from sea level to 9,000 metres (30,000 ft) causes a weight decrease of about 0.29%, neglecting any change in bouancy of the less dense atmosphere. (Admittedly from
https://en.wikipedia.org/wiki/Gravity_of_Earth#Latitude, but the I don't believe the figures are much disputed).
So if the UA theory is going to rely on the "Equivalence Theory" for justification, some rational explanation for these variations must be provided. This explanation should show why changes in "g" are detected as a result of massive ore bodies - used in mineral exploration.
And, please don't come up with the "gravitational effects of the sun moon and other celestial bodies" for obvious reasons!
It's probably just me! I don't think little things like facts get in the way of Zetetic "science".