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# At a power plant that produces 1 GW (109 watts) of

ISBN: 9780201380279 40

## Solution for problem 2P Chapter 4

An Introduction to Thermal Physics | 1st Edition

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Problem 2P

PROBLEM 2P

At a power plant that produces 1 GW (109 watts) of electricity, the steam turbines take in steam at a temperature of 500°C, and the waste heat is expelled into the environment at 20° C.

(a) What is the maximum possible efficiency of this plant?

(b)Suppose you develop a new material for making pipes and turbines, which allows the maximum steam temperature to be raised to 600°C. Roughly how much money can you make in a year by installing your improved hardware, if you sell the additional electricity for 5 cents per kilowatt-hour? (Assume that the amount of fuel consumed at the plant is unchanged.)

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PBIO1030 Fall 2016 Week 10 Learning Objectives Monday, October 24, 2016 (Read first page and section on Stimulants) 1. Name the three main categories of psychoactive plants.  Stimulants  Depressants  Hallucinogens 2. Describe some benefits and side effects of stimulants.  Benefits o Sense...

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