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A barrage is a dam-like structure that is built in the tidal zone of an ocean to capture tidal energy.
Explanation:
It has sluice gates that can be controlled to harness the kinetic energy in the flow of water. The sluice gates also have turbines. During high tides, as the water flows into the barrage, it turns the turbines that generate electricity using the dynamo effect. During low tide, as the water recedes back to the oceans, and the barrage gets emptied, the water flow, again, turns the turbines.
Some barrages first capture the ocean water during high tide, until the dam-like structure is full, without generating electricity. When the tide is low, the sluice gates release the water and the turbines generate electricity. This kind is a one –way power generation.
Learn More:
For more on tidal power check out;
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Explanation:
Percentage w/v means that weight of solute present in 100 ml of a solution. Hence, 15% w/v means that 15 gram of solute per 100 ml of solution.
Hence, for 2 L (or 2000 mL) preparation the amount of mass will be calculated as follows.

= 300 g
Thus, we can conclude that weight of Tris-HCL required is 300 g.
Water does go threw water treatments to treat water so I’ll say true