Ariver does 6500 j of work on a water wheel every second. the wheels efficiency is 12%
a. how much worked in joules can the axle of the wheel do?
b. what is the power output of the wheel in 1s?

12% efficiency means 12% of 6500j which will be 780j/s
the power output will therefore be 780j/s

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