Why an object would weigh more at either the north or south pole
than it would at the equator.

0.034m/s2

Explanation:

Since there is more centrifugal force at the equator to cancel gravity, your overall weight at the equator versus at the poles is even less. The centrifugal force on your body at the equator is 0.034 m/s2 times the mass of your body. The centrifugal force at the poles is zero.

i do believe that its called,(the segovia highlands); plz check first good luck;

81 is a composite number.