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).
The ball itself can travel as fast as a force exerted on it can send it. This can range from 1 mph to 1,000 mph. An average first serve speed for male professional tennis plaâ¦yers is about 120 mph, but it has been observed to be as fast as 155 mph (Andy Roddick, USA). Likewise, a male professional player's second serve speed can vary, but it is on average about 92 mph. An average male professional tennis player's shot speed is about 70 mph, with fast-paced winners increasing to speeds up to 110 mph (although it can be higher on rare occasions).