Opening is the subject of this month’s column. I’m talking about the die opening, or die gap, out of which our extruded plastic comes, not the politically charged battle over opening the economy that ...

Planet Earth is spinning at a rate of 0.0007 rpm. Easy to calculate: One revolution per day, divided by 24 to get revs/hr and then by 60 to get revs/min = rpm. As for linear speed, it depends on where ...