When it comes to upper pecs, the study found that the incline bench is just slightly more effective than the flat or decline bench. The study also tested grips, and found that a narrower grip (just beyond shoulder width) combined with an incline bench press is the best for those upper pecs.
You are currently converting speed units from speed of light to miles per hour. 1 c = 670616629.3844 mph. speed of light. c. miles per hour. 670616629.3844 mph.
Asker's rating. 1  They move on the order of an inch per year, so in mph that would be about 2x10-8 mph or 0.00000002 mph. 2  It varies. 3  actually more of a mm to a cm a year...not very fast. 4  Try millimetres per thousand years and you might get a sensible answer.