does an object always have the same mass and length?

Question

does an object always have the same mass and length?

Answer 1

No. The theory of relativity states that an object moving at a high enough velocity will appear to shrink along the direction of motion and increase mass from the point of view of a non moving observer, so much so that, if a physical object would be to travel at the speed of light, its dimension will be zero and its mass infinite.

Answer 2

If you are talking about mass, an object will not change its mass, because it is the amount of matter in an object. If you're talking about weight, then an object's weight changes when it goes from place to place. Albeit, very small if you just lift the object 1 meter above its original position. When you're talking about length, length can constantly change.

Answer 3

It will always have the same mass at all times, unless you cut a piece off or something, which also conflicts with length. Length is inconstant. You can pull it, heat it, freeze it, stretch it, etc. and, even though it may be minute amounts sometimes, the object's length will change. I hope I helped!

Answer 4

Always the same mass but not always the same length. Substances tend to expand with increased temperature.

Answer 5

an object's length can change, by forces such as pressure , heat, etc.
mass is constant in day to day motion of macroscopic objects.

However, when velocities approach that of light, mass can change.
dP=m dV ( for ordinary velocities)
dP=d(mv) (for v approaching 3*10^8 m/s)

i guess , this may help

Answer 6

It strongly depends upon the observer and its relative speed.
From the object's opint ov view, only the length can vary according to its temperature and of external pression