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).
How the serves at Wimbledon compare to the speeds of other sports by infographic. Share. So far this year, Wimbledon has given us plenty, starting with the time two legendary icons of the sport couldn't even escape the second round. What it hasn't given us is a challenger to the record for the fastest serve ever at Wimbledon. That mark remains the 148 mph (238 km/h) serve by Taylor Phillip Dent (USA) at the 2010 competition.