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7.
As per Berlin's formula, the length of wave in metres is given by where 't' is the period in seconds for two successive waves to pass the same section.
Assertion A : Basin walls have to be of much grater height than dock walls. Reason R : Tidal basins are subject to fluctuations of levels due to tidal variations. Select your answer based on the coding system given below:
A.
Both A and R are true and R is the correct explanation of A.
B.
Both A and R are true but R is not correct explanation of A.
Assertion A : Depth and width required at the entrance to a harbour are more than those required in the channel. Reason R : The entrance to a harbour is usually more exposed to waves as compared to the harbour itself. Select your answer based on the coding system given below:
A.
Both A and R are true and R is the correct explanation of A.
B.
Both A and R are true but R is not the correct explanation of A.
Assertion A : Intervention of undulations in the sea bed reduces the depth of wave at the section. Reason R : No wave can have a height greater than the depth of water through which it passes. Select your answer based on the coding system given below:
A.
Both A and R are true and R is correct explanation of A.
B.
Both A and R are true but R is not the correct explanation of A.
Assertion A : Large size stones are required in stone revetment in shore protection. Reason R : Resistance of stone to wave force is proportional to its volume and wave force is proportional to the exposed area of the stone. Select your answer based on the coding system given below.
A.
Both A and R are true and R is the correct explanation of A.
B.
Both A and R are true but R is not a correct explanation of A.