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ตอนที่ 2 การสืบเสาะหาข้อมูลเพื่อหาสาเหตุการเกิดน้ำขึ้นน้ำลง

                1. แรงไทดัลคืออะไร
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                2. ปรากฏการณ์น้ำขึ้นน้ำลงเกิดจาก

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                3. ตามปกติแล้ว มีน้ำขึ้นน้ำลงเกิดขึ้นวันละกี่ครั้ง ระยะเวลาระหว่างน้ำขึ้นและน้ำลงห่างกันประมาณกี่ชั่วโมง

                   และเพราะเหตุใดจึงเป็นเช่นนั้น
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                4. ปัจจัยใดบ้างที่ส่งผลต่อการเกิดน้ำขึ้นน้ำลง

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              วิทยาศาสตร์: ปรากฏการณ์น้ำขึ้นน้ำลง                                               หน้า 9 จาก 34

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