The answer is c. it requires no works
Energy generated from tides is called tidal power, or tidal energy, and it is a form of hydropower that transforms energy obtained from tides into electricity, mainly.
It looks like Doppler effect. Sound waves passing through a big way until they get to your ears. We got the highest frequency when we receive it, while it goes it remains the same and when it goes down we receive lower frequency.
Answer:
The vertical distance between these two points is 12.28 cm.
Explanation:
Given that,
Speed of water = 1.23 m/s
Diameter at lower point d'= 0.787 d
We need to calculate the speed of water
Using continuity equation



Put the value into the formula


We need to calculate the vertical distance h between these two points
Using Bernoulli theorem

Here, P₁ = P₂ = atmosphere pressure is same because both end is open





Hence, The vertical distance between these two points is 12.28 cm.