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# At a hydroelectric power plant, water is directed at high ISBN: 9780130606204 3

## Solution for problem 12Q Chapter 7

Physics: Principles with Applications | 6th Edition

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Problem 12Q

At a hydroelectric power plant, water is directed at high speed against turbine blades on an axle that turns an electric generator. For maximum power generation, should the turbine blades be designed so that the water is brought to a dead stop, or so that the water rebounds?

Step-by-Step Solution:

Solution 12Q:

We have to determine the most efficient design, for maximum power generation at hydroelectric power plant.

Step 1 of 3</p>

Concept:

Law of conservation of linear momentum: If no external force acts on the system, then the final momentum of the system is equal to the initial momentum of the system. Thus momentum is conserved.

Step 2 of 3</p>

Assume that water is falling down onto the turbine blades with momentum of After the water is incident on the turbine blades, consider that the momentum gained by the turbine blades is and the water rebounded with a momentum of .

As no external force acts on the system, therefore by using the law of conservation of momentum, we get the relation between the momentums as, As the water rebounds from the turbine blade, its momentum after rebound is opposite to the momentum of turbine blade. Hence, the magnitude of the initial momentum of falling water is expressed as Hence, the magnitude of the momentum gained by turbine blades is, ...(1)

Step 3 of 4

Step 4 of 4

##### ISBN: 9780130606204

This full solution covers the following key subjects: Water, blades, turbine, power, hydroelectric. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. The answer to “At a hydroelectric power plant, water is directed at high speed against turbine blades on an axle that turns an electric generator. For maximum power generation, should the turbine blades be designed so that the water is brought to a dead stop, or so that the water rebounds?” is broken down into a number of easy to follow steps, and 48 words. The full step-by-step solution to problem: 12Q from chapter: 7 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. Since the solution to 12Q from 7 chapter was answered, more than 547 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204.

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