Um this doesn't make since to me since you did not clearly state your awnser
Never is the correct answer
The spring is neither stretched nor compressed. an object having a mass m is attached to the free end of the spring. consider an action
<span>Suppose you mixed two chemicals in the lab until you could not tell the two apart. After some time passed, a white powder formed which would not dissolve, and settled on the bottom. The mixture was first homogeneous then heterogeneous. </span>
