A high tide is occurring at Kitty Hawk, North Carolina (36°N, 75°W).

(a) What other longitude in the east is also experiencing a high tide?

Another longitude in the east that is likely experiencing a high tide at the same time as Kitty Hawk, North Carolina (75°W) is 105°E. This is because the Earth is divided into 24 time zones, each spanning 15° of longitude. The time difference between Kitty Hawk's longitude (75°W) and 105°E is 180°, or 12 hours, which is roughly the time it takes for a high tide to occur again at the same location.