According to special relativity, which statement is true: 1. the linear dimension of an object is the same in any two inertial systems 2. the linear dimension of an object is shorter in a system that uses two clocks 3.the linear dimension of the object depends on the acceleration due to gravity 4.the linear dimensions of all objects have bean determined by einstein 5.none of the above

Statement 1 is true

Explanation:

As per the special theory of relativity, laws of physics do not vary with respect to all the observers who are non-accelerating and speed of light in space does not depend on the motion of observers.

Inertial frame is a reference frame which is non accelerated, i.e., the motion of the frame is at  zero acceleration or constant velocity whereas a reference frame with acceleration is non-inertial.

Therefore, the linear dimension will be same in any two inertial systems.