First, my monthly reminder: There are no toxic plastics, none of them. Our materials are safe and do far more good for the environment than harm. When you meet anyone who thinks otherwise, try to find ...

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 ...