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It is important for the United States to build canals (wide canals) because the country is visited multiple times by hurricanes annually. Hurricanes are accompanied by heavy rainfalls and if left unchecked, causes flooding. The function of canals is to diffuse accumulated rainwater and direct it to greater bodies of water.
Sound wave is a pressure caused by the vibration of something in a medium that transfers anergy, like air.
If you mean Fahrenheit and Celsius, than 16 F is greater than 16 C
