How do the measure the height of waves on Lake Michigan?

Who wrote the Statue of Liberty Song? How many vehicles used the humber bridge each year? How tall are the Golden Gate's towers above water? What was the purpose of the golden gate bridge? Which sea flanks the western coast of India? What are the names of the 8 gates of jodhpur? What makes the Canadian shield different from the Great Lakes and StLawrence Lowlands? What brige goes across the thames river? Which lake in Kentucky is the youngest? What does sur la mean? Where is 3.316N 95.854E? How many trees are cut down in 1 day in New Hampshire? What happens to the ability of a river to erode land under it if its slope decreases.Why? Can you die if you went down a waterfall? Which of the towns lies at the junction of East and West Lidder rivers? What body of saltwater touches 5 different states? Are platypuses illegal outside Australia as Zoo animals too? What is the ocean is your us eastern border? When was Howrah Bridge created? The height of the CN Tower is 550 meters what is the height of the Tower in a scale drawing if the scale is 1 to 11000?