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Nov 4, 2019 · A conversion factor is a quantity used to convert between one unit and another via multiplication (or division). A conversion factor changes the units of a measurement without changing its value. The number of significant digits in a conversion factor may affect the conversion in some cases. Quantity. SI Unit.
- Anne Marie Helmenstine, Ph.D.
Aug 10, 2020 · Samuel J. Ling (Truman State University), Jeff Sanny (Loyola Marymount University), and Bill Moebs with many contributing authors. This work is licensed by OpenStax University Physics under a Creative Commons Attribution License (by 4.0).
Apr 24, 2022 · The trick is to multiply by the conversion factor for each unit to the power that makes the original unit cancel out. The conversion factors to the proper powers are then multiplied by the original number and the proper cancellations of the old units are double checked. If done with care, this yields the correct result every time!
11 miles x 1.609347 = 17.70281 km. The first significant digit of the metric value (1) is equal to the first significant digit of the inch-pound value (1). Therefore the number of significant digits to be retained in the converted value is the same as that for the original value (2), and the result is 18 km.
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1.1 The Scope and Scale of Physics; 1.2 Units and Standards; 1.3 Unit Conversion; 1.4 Dimensional Analysis; 1.5 Estimates and Fermi Calculations; 1.6 Significant Figures; 1.7 Solving Problems in Physics
Now we can set up our unit conversion. We write the units we have and then multiply them by the conversion factor so the units cancel out, as shown: 80 m × 1 km 1000 m = 0.080 km. (1.4.1) (1.4.1) 80 m × 1 k m 1000 m = 0.080 k m. Note that the unwanted meter unit cancels, leaving only the desired kilometer unit.
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Next, we need to determine a conversion factor relating meters to kilometers. A conversion factor is a ratio that expresses how many of one unit are equal to another unit. For example, there are 12 in. in 1 ft, 1609 m in 1 mi, 100 cm in 1 m, 60 s in 1 min, and so on. Refer to Appendix B for a more complete list of conversion factors. In this ...
