for example the equipment cost for a 10 kw wind turbine costs roughly $ 40000 while a 100 kw turbine can cost more than $ 350000 according to bergey com the average wind turbine can cost $ 48000 to $ 65000 to install
The boats can typically travel at speeds over 80 knots (150 km/h) in calm waters, over 50 knots (90 km/h) in choppy waters, and maintain 25 knots (47 km/h) in the average five to seven foot (1.5 to 2 m) Caribbean seas. They are heavy enough to cut through higher waves, although at a slower pace.
The speed of sound in water is 1454M/sec. The speed in air is 332M/sec. When we are out sailing our boat, we can hear a motor boat before we can see it by the sound traveling through the water and coming in through the keel. When they are testing sonar in the area we can hear the sonar through the keel also.