Re: your rod
The Square Cube Law does not apply. You are proposing a change in only one dimension, length, when the law applies to proportional increases in all dimensions. So long as you are maintaining the same diameter, doubling a
or tripling the length will only double or triple the volume and mass.
If, however, you double your rod in both length and diameter, then the Square Cube Law DOES apply and the area of the rod would be four times greater and the volume would be eight times greater.
You’ve copied and pasted your last reply to me?