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Unformatted text preview: High tides occur every 12 hours 25minutes remember, the Moon moves! The Suns tidal effect on Earth is not as strong. Remember the inverse square law.the Sun is a long way away. Tides are strongest when the Sun & Moon pull in the same direction (new & full phases) high tide is higher than usual (spring) Weakest when the Sun & Moon pull at right angles (first & last quarter phases) high tide is lower than usual (neap)...
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- Spring '08