The differentiator is that you tighten a screw by turning the screw head, but you tighten a nut and bolt by holding the bolt head and turning the nut.
Therefore, the difference is based on a universal frame of reference, which Einstein showed to be a fallacy. In a relativistic universe, bolts and screws are the same thing :-)
The differentiator is that you tighten a screw by turning the screw head, but you tighten a nut and bolt by holding the bolt head and turning the nut.
Therefore, the difference is based on a universal frame of reference, which Einstein showed to be a fallacy. In a relativistic universe, bolts and screws are the same thing :-)