প্রশ্নঃ একটি সুই পানিতে ডুবে যায় কিন্তু একটি জাহাজ পানিতে ভেসে থাকে কেন?
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ক.Needle cap pierce through the surface of water
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খ.Needle passes through the space among the molecules of water
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গ.Ship displace water which weights more than its own weight
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ঘ.Needle has less volume than ship
উত্তরঃ গ
 Needle cap pierce through the surface of water খ) Needle passes through the space among the molecules of water গ) Ship displace water which weights more than its own weight ঘ) Needle has less volume than ship উত্তর: গ) Ship displace water which weights more than its own weight
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