It is called a magnet.
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It's 4.2 . An object's mass doesn't change. The thing that does change is the gravitational forcethat attracts the object to another mass. The strength of that force depends on the mass of bothobjects. The force on the first object is what we call the object's "weight".
In any gravitational interaction, the forces are equal and opposite ... Each object is pulledtoward the center of the other one, and the strengths of the two forces are equal.In daily life on Earth, we call the force that attracts us toward the center of the Earth our "weight".Nobody ever talks about the force of gravity that attracts the Earth toward you, but it's equal.Your weight on Earth is the same as the Earth's weight on you.
Satellite. Satellites can be natural, in which case we usually call them "moons", or artificial.
metaphor
Conduction is the transfer of energy from one object to another.
static charge
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Velocity is a relative term. If we call that the object is moving and in particular direction, then there must be another object present, from witch it is moving away. and we can not say, witch object is moving away. If all object maintain the same position in respect to each other then, we will call them to have zero velocity.
We call that the "weight" of the first object when it's on the second object. Note that it's exactly equal to the weight of the second object when it's on the first object.
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