The mass of an object can be subtracted or added. For example, with water, you can just add more to have a larger mass. With ice, you can just chop off a portion to lessen its mass.
Though, if you take a piece of paper and crumple it up, the mass will stay the same.
It just depends on the context of the situation.
Yes
Because mass is not the same as weight. Weight is mass times gravity so your weight will change if you are on the earth or moon but your mass will stay the same.
Its mass remains the same (except for the very small amounts that stick to the knife blade).
No because now part of the apple is missing so the mass would be less. The total mass of the apple is not changed, but part of the mass is now in the biter's mouth.
Your mass is always the same.
Yes, no gas is given off, therefore the mass of conversation will stay the same.
Yes
Your mass will stay the same. Mass is always the same no matter what.
Your mass will stay the same regardless of your location in the universe. Mass is a fundamental property of an object and does not change with location.
not always it depends
After water has been boiled, its mass will stay the same.
Your mass would stay the same. Mass is the amount of matter in an object, so your mass would stay at 68kg.
mass mass
The two properties of a crayon that will stay about the same after being melted is it's color and mass.
No, two objects with the same mass will not always have the same momentum. Momentum is a vector quantity that depends on both mass and velocity. If the objects are moving at different speeds, they will have different momenta even if they have the same mass.
You cant, the mass will always be the same, NO matter what.
The law of mass conservation is generally valid.