It depends on the planet! All masses are different on each planet, because the gravity is different. But I'm sure you want the weight of them in Earth terms. They're about the weight of a human, only a little heavier, as they are machines.
The mass won't change (except for insignificant effect due to the Theory of Relativity); the weight will be twice as much. I am assuming you mean the gravitational field; that is, the gravitational acceleration will be twice as much.
The weight itself is how much mass is there, so in theory the WEIGHT changes to how much mass there is.
The relations between mass and weight are that mass shows how much an object contains. This is about the same thing as weight - how much an object contains.
mass is how much matter is in an object and weight is the gravitational pull on an object mass x gravity = weight
weight is measured by how much gravity is pushing down on you. weight is different from mass because mass is how much room you take up. weight is how much something or someone weighs.
Mass and weight are two separate things. Mass is how much an object contains. Weight is how the mass is affected by gravity. To answer your question, no, it would not.
It doesn't really. mass is what is inside something. For example, if you went to the moon, you wouldn't lose anything therefore, your mass would not change. But if you went to the moon, your weight would go down. This is because there is a much smaller gravitational pull on the moon than the earth does. So, basically the weight of something is decided by how powerful the gravitational pull is on you.
As long as the mass on the end is much greater than the mass of the string it's hanging from, the mass has no effect at all on the speed or the period.
The mass number identifies how much an objects weight is.
Weight changes based on were you are while mass doesn't. For example, if you are on the moon your weight is much less but your mass is the same.
Weight is how heavy something is and mass is how much space something takes up.
-- Your weight depends on the mass of the other mass to which you are gravitationallyattracted, and also on your distance from its center.-- The mass of the moon is much less than the mass of the Earth.-- The moon's surface is much closer to its center than the Earth's surface is to its center.