# Act_1 - Name _ Section _ Period 1 Activity Sheet: Intro to...

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Name _________________________ Section ___________________ Period 1 Activity Sheet: Intro to the World of Energy 1.1 What Are Ratios? How Are They Used? Your instructor will introduce the concepts of ratios and “per.” Use this information to answer the questions in this section. a) Ratios are useful when making comparisons. Use ratios to compare the number of miles each vehicle can travel using one gallon of gas. 1) A sports car uses 0.8 gallons of gas to travel 17 miles. How many miles per gallon does it get? ____________ 2) A sports utility vehicle uses 3.9 gallons to gas to travel 57 miles. How many miles per gallon does it get? ____________ 3) How many gallons of gas does the sports car require to travel 243 miles? ___________ b) The next activity illustrates how ratios are used to convert units. 1) Using the blue balances on your table, place washers in the center of one balance pan and plastic chips in the center of the other pan. a) How many chips are required to balance one washer? ________ b) Write the number of chips per washer as a ratio. _______________ 2) Using the balance, find how many chips are required to balance one metal nut. Write the number of chips per nut as a ratio. _________ 3) Without using the balance , calculate how many nuts there are per washer. Show the steps in your calculation, including units and how they cancel. _________ 4) Use the balance to check your answer to part c. How many nuts balance one washer? ______ c) Use ratios to convert 10 miles/1 gallon of gas into kilometers/liter. Show the steps in the calculation, including units and how they cancel. (Hint: 1 mile = 1.609 kilometers and 1 gallon = 3.785 liters.) _________ d) Group Discussion Question: List some common ratios. Why are ratios useful? Washer

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## This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

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Act_1 - Name _ Section _ Period 1 Activity Sheet: Intro to...

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