A scientist is making a precise measurement of g at a certain point in the indian ocean (on the equator) by timing the swings of a pendulum of accurately known construction. To provide stable base, the measurements are conducted in a submerged submarine. It is observed that slightly different results, for g is obtained when the submarine is moving eastward through the point than when the submarine is moving westward, the speed in each case being 10 mile/h. Account for this difference and calculate the effect, in parts per million that it has on the value of g.

Explanation

The westward satellite will appear to have a shorter period than the eastward satellite, owing to the rotation of the earth itself from west to east.