Which factor causes global wind patterns? a. changes in the distance between Earth and the Moon
b. unequal heating of Earth’s surface by the Sun
c. daily changes in the tilt of Earth’s axis
d. rapid rotation of the Sun on its axis

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel