Does the mass of an object changes with location?

No.

Weight depends upon location; mass does not.

According to the theory of relativity, however, mass depends upon speed. The changes are only noticeable at velocities that are a large fraction of the speed of light.

To understand why the mass of an object does not change with location, we need to differentiate between mass and weight. Mass refers to the amount of matter an object contains and is an intrinsic property. It remains constant regardless of an object's location.

On the other hand, weight is the force exerted on an object due to gravity. It depends on the location of the object because the force of gravity varies with location. In simpler terms, weight is the measure of how heavy an object is based on the gravitational force it experiences in a specific location.

For example, the weight of an object on Earth's surface will be different from its weight on the moon or another planet because the acceleration due to gravity is different in each location. However, the mass of the object will remain the same regardless of its location.

It's worth noting that according to the theory of relativity, an object's mass can change with speed, but these changes are only significant at velocities close to the speed of light. In everyday life and for most practical purposes, we can disregard these relativistic effects.