Ocean power in New Zealand speed. Because the tidal speed doubles, eight times more tidal power can be produced at spring tides than at neap tides. The entrance to Kaipara Harbour, one of the largest harbours in the world, is a channel to the Tasman Sea. It narrows to a width of , and is over deep in parts. On average, Kaipara tides rise and fall . At high tide, nearly 1000 square kilometres are flooded. Spring tidal flows reach 9 km/h (5 knots) in the entrance channel and move 1,990 million cubic metres per tidal movement or 7,960 million cubic meters daily. In 2011,
What Are You Going to Do to Help the Boys? song was written for both piano and voice. The song is a call to action. It encourages listeners to buy liberty bonds, especially if they are staying home while soldiers fight overseas. The voice states that it doesn't matter one's age, where he is from, or who he is. Uncle Sam expects everyone to help in the war effort. The chorus is as follows: The sheet music can be found at Pritzker Military Museum & Library. What Are You Going to Do to Help the Boys? "What Are You Going to Do to Help the Boys?" is a World War