Observed gravity varies with both elevation (free-air effect, ~0.3086 mgal/m) and latitude (normal gravity increases toward the poles, with gradient ≈0.811 sin(2φ) mgal/km at mid-latitudes).
At 45°N, the latitude gravity gradient is at its maximum (~0.811 mgal/km, since sin(2×45°)=1). Over the 20 km separation between A and B, the expected...
Full option-by-option analysis available to enrolled students.