A balsa wood block of mass 55 gram floats on a lake, bobbing up and down at a frequency of 2.9 Hz.
Part A Find what is the value of the effective spring constant of the water? Express your answer to two significant figures and include the appropriate units.
Part B A partially filled water bottle of mass 0.29 kilogram and almost the same size and shape of the balsa block is tossed into the water. Find at what frequency would you expect the bottle to bob up and down?