That could be one reason the national average spent on an engagement ring, as well as diamond carat size, or weight, have been rising. The average spent on an engagement ring grew 3% to $5,598 last year from a year earlier, according to TheKnot. That's still down from 2009's average of $5,861, however. The average carat size for the center stone is just over 1 carat. The average total carat size for engagement rings, including any diamonds on the setting, is 2 carats, Miles said. 3. Weigh payment options.
In the water, fish take the lead. Sailfish are the fastest in the water, at 70 miles per hour (113 km per hour) â the same speed in the water as cheetahs attain on land. Mako sharks can reach 60 miles per hour (97 km per hour), and marlins, 50 miles per hour (80 km per hour). The fastest mammal in the water is the killer whale, which can swim at up to 48 miles per hour (77 km per hour). Neither insects, reptiles, mammals, or terrestrial bird speeds come anywhere close to birds in flight. Birds are not only the fastest animals in the air: they are the fastest on Earth.
John Farrier â¢ Tuesday, July 28, 2009 at 7:31 PM â¢ 0. The fastest submarine in the US Navy can go only 25 to 30 knots. But the Electric Boat Corporation, the primary designer for US Navy submarines, is trying to design one that can reach up to 100 knots. The sub utilizes the phenomenon known as supercavitation.