Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 2, Problem 2.41P

How much oil (138,690 Btu/gal) would it take to generate the electricity needed to keep a 100 W of light bulb lit for 1 year if the overall efficiency of the generating station is 30%?

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A monthly electric bill is based on the following usage: A set of electronic devices that altogether are rated at 1,812 W. The devices are ON 12 hours a day. A set of light of total power 562 W that are on 24 hours a day. What would be the value of the bill if we count one month as 30 days and electricity costs $0.08 /kWh. Write down your answer as an amount of dollars rounded off to an integer value ( no decimals) and do not put any unit.
You decide to cook your dinner with a microwave instead of firing up the electric oven. You use 1,120 Watts for 15 minutes per dinner. What will it cost you to cook your dinners for a year if your utility charges you 5.5 cents per kWh?
A fan in an air conditioning unit rated at 250 WCome on for an average of 5.0 min at A time, a total of 48 times per day. What is the yearly cost of operating the fan, if electricity cost fifteen cents/KWH?

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Introduction To Health Physics

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