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).
Making the world better, one answer at a time. The fastest second serve ever recorded was accomplished on August 3rd 2007 by 14th seeded player Ivo Karlovic of Croatia, otherwise known as 'The King of Aces'. The second serve was an astonishing 144 miles per hour (232 km/h), the fastest second serve on record.