Assertion A : Shore protection stone revetments necessitate large-sized rocks. Reason R : A stone's resistance to wave action scales with its volume, whereas wave impact scales with its exposed surface area?
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Answer: A. Both A and R are true and R is the correct explanation of A
Explanation
Shore protection revetments require massive rocks to remain stable against the relentless pounding of ocean waves. A stone's resistance to wave displacement scales with its mass and volume, which increase cubically with dimensions. Conversely, hydrodynamic wave impact forces scale with the exposed surface area of the stone facing the water. Shore revetments are sloping armor stone structures built along coastlines to prevent erosion from wave action. Wave energy attacking coastal revetments exerts dynamic drag and lift forces on individual armor units. Large-sized quarry stones or specially shaped concrete armor blocks are standard materials for heavy coastal defense.
Stating that the reason is false misinterprets the fundamental hydrodynamic scaling laws governing wave stability. Assuming the reason does not explain the assertion ignores the direct mathematical relationship between stone volume and wave resistance. Claiming either statement is incorrect contradicts well-established coastal engineering design principles and physics.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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