Calculate the centripetal force on the end of a 100 m wind turbine blade that is rotating once every 7 seconds. assume the mass is 4 kg.

Centripetal force is the force on an object on a circular path that keeps the object moving on the path. It is always directed towards the center and its magnitude is constant, based on the mass of the objects, its tangential velocity and the distance of the object from the center of the circular path (radius)
Fc = mv²/r 
 m is 4 kg, r = 100 m, the velocity is (2πr/7) = 89.80 m/s.
Thus centripetal force =( 4× 89.8²)/100
                                    = 322.562 N

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds

Iwannasay c is the most accurate