I've read the creation of dams in Earth can change the speed of rotation of the planet because they reallocate the mass over the planet.
Let's suppose humans find a valuable mineral in the Moon and they start to transfer it in huge amounts to the Earth. How would the massive transfer of mass from the Moon to Earth, change the rotation, orbit and speed of the Moon and Earth.
Ok, so since possible repliers have been how much mass it would transfers, let's suppose I want to know the effects from any point between 0 to 1/10 to the mass of the moon. Since the effects would be different when 1% was transfered to the point to when 10% was transfered