After 7 days when they are at right angles to each other they cancel each others forces giving the low neep tides. A very important factor about tides that is not included in the above, is the height of the ocean floor. Different heights can cause funneling of the tidal flow, heaping the tides up in shallow water and causing even more complex effects where flows meet.
Conclusion
Gravity is an essential to life. It is also one of the four key physical forces which are, Gravity, Electromagnitivity, Strong Nuclear Force and Weak Nuclear Force (Physics for a Modern World 1986). It controls a lot of things here on earth like tides and weight. Without gravity, life would be very different. How would you eat food from a plate? How would you pee in a toilet? The significance of the helium ballon would cease to exist. And if you flip your pancakes would you ever see them again? All in all, gravity is very important to life and hats off to Newton for discovering it.
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