Overall, heart - rate tracking was on par with the Charge 2 during exercise, which we found to be within a couple of beats per minute of where we expected. (pocket-lint.com)
During 15 - minute play sessions with electronic toys, parents said about 40 words per minute on average. (sciencenews.org)
A circular mirror, 40 feet in diameter and weighing 1,000 pounds, is mounted to the ceiling at an angle, rotating at one revolution per minute. (momaps1.org)