a.) What is the balance of forces on a parcel of fluid if it is experiencing inertial motion? Assume that there are no frictional or pressure-gradient forces.
b.) In August 1936, Gustafson and Kullenberg observed inertial motion in the Baltic Sea, see figure below (adapted from Gill, A.E., Atmosphere - Ocean Dynamics, 1982). Calculate the velocity of this parcel of fluid on its fifth revolution assuming that its path is circular.
c.) Gustafson and Kullenberg observed a 14 hour period
of oscillation, what is the theoretical inertial period for this parcel
of fluid? Is there any difference? Why?