Use the general formula E : (1/2)pga2, calculate the energy (in Joules) contained in a area of 1 km2 for a wave height of 2a 2 1 m. Assuming that all of this energy is moving toward the shore at the group velocity corresponding to T = 10 s waves, how many watts per kilometer of shoreline are being dissipated at the shore? If only 10% of this energy input could be captured by electricitygenerating devices, how many households per kilometer of shoreline could be powered by waves? (The average American household consumes about 1000 watts of power). Assume a water density of p = 1025 kg m'3