Best Answer: Today, the national average for the diamonds chosen for engagement rings with regard to carat weight is 0.38 carats. In general, the carat weight averages of engagement ring diamonds are increasing.
Now have you ever wondered what is up with tennis players and the noises they make when hitting the ball back and forth. Well, they have every right to make these noises. Venus Williams served the world's fastest tennis ball among women which was clocked at 56.95 m/s (127.4 mph). That's twice the speed limit on a regular highway in New York City. Tilden holds the title of World's fastest tennis ball served among men with a speed of 73.14 m/s (163.6 mph).
Plays the sport, just as a hobby. Sam Groth hit a serve that was measured at 263 kmph (163 mph), in 2012. Fastest recorded tennis serves. An interesting fact is that he did it when he was double-match-point down. That just goes to show that when one is at their lowest point, one will start caring less about the outcome, and take more risk.