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# Approximately 5.5 \$ 106 kg of water falls 50 m over

## Problem 125 Chapter 8

Fundamentals of Physics | 10th Edition

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Fundamentals of Physics | 10th Edition

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Problem 125

Approximately 5.5 \$ 106 kg of water falls 50 m over Niagara Falls each second. (a) What is the decrease in the gravitational potential energy of the waterEarth system each second? (b) If all this energy could be converted to electrical energy (it cannot be), at what rate would electrical energy be supplied? (The mass of 1 m3 of water is 1000 kg.) (c) If the electrical energy were sold at 1 cent/kW h, what would be the yearly income?

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Physics 101 Notes: 8/25 (Week 2 continued)  Force o Defined as a push or a pull, and is a vector quantity, meaning that it has direction depending on which way it is being pushed or pulled o It has amount and direction (how much force is being applied and in which direction it is moving)  Newton’s First law o First draft:...

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