PHY183-Lecture03p - I>Clicker Registration Physics for...

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1 January 11, 2012 Physics for Scientists&Engineers 1 1 Physics for Scientists & Engineers 1 Spring Semester 2012 Lecture 3 – Unit Conversion and Vectors Physics for Scientists&Engineers 1 2 I>Clicker Registration Physics for Scientists & Engineers 1 3 Unit conversion When two quantities are added together, they must have the same dimension AND the same units. When two quantities are multiplied (or divided) together, they do not have to have the same dimension Like dimensions should be converted to the same unit for simplifying the units associated with your result. EXAMPLE: You are permitted to use a single 5-inch by 8- inch note card on each of our 40 minute in class exams. Convert these dimensions to cm. The area of one side of this notecard is 40.0 in 2 convert this area to m 2 2.54 5.00 12.7 1.00 cm in cm in ⋅= 2.54 8.00 20.3 1.00 cm in cm in 22 2 2 2.54 1.00 40.0 0.0258 2.58 10 1.00 100 cm m in m m in cm  ⋅⋅= =   Physics for Scientists&Engineers 1 4 Unit Conversion
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This note was uploaded on 04/02/2012 for the course PHY 183 taught by Professor Wolf during the Spring '08 term at Michigan State University.

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PHY183-Lecture03p - I>Clicker Registration Physics for...

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