Squared and Cubed Conversion Factors

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Presentation transcript:

Squared and Cubed Conversion Factors

Example Problem Measured dimensions of a rectangle: length (L) = 9.70 cm width (W) = 4.25 cm L W Find area of rectangle. A = L . W = (9.70 cm)(4.25 cm) = 41.2 cm 2 . cm

( ) ( ) ( ) ( ) Convert 41.2 cm2 to m2. ______ ______ ______ ______ X m2 = 41.2 cm2 = 0.412 m2 WRONG! = 0.412 cm.m Recall that… 41.2 cm2 = 41.2 cm.cm ( ) ______ ( ) ______ X m2 = 41.2 cm.cm 100 cm 1 m 100 cm 1 m = 0.00412 m2 ( ) ______ 100 cm 1 m 2 X m2 = 41.2 cm2 = 0.00412 m2

( ) ( ) ( ) Convert 41.2 cm2 to mm2. _____ _____ _____ Recall that… 41.2 cm2 = 41.2 cm.cm ( ) _____ ( ) _____ X mm2 = 41.2 cm.cm 1 cm 10 mm 1 cm 10 mm = 4,120 mm2 2 ( ) _____ 1 cm 10 mm X mm2 = 41.2 cm2 = 4,120 mm2

Measured dimensions of a rectangular solid: Length = 15.2 cm Width = 3.7 cm Height = 8.6 cm H W Find volume of solid. L V = L . W . H = (15.2 cm)(3.7 cm)(8.6 cm) = 480 cm 3

( ) ( ) ( ) ( ) ( ) Convert to m3. _____ _____ _____ _____ _________ cm.cm.cm ( ) _____ ( ) _____ ( ) _____ 100 cm 1 m X m3 = 480 cm 3 2 100 cm 1 m 100 cm 1 m = or ( ) _____ 100 cm 1 m 3 X m3 = 480 cm3 = 0.000480 m3 or 1 m 1000000 cm ( ) _________ 3 X m3 = 480 cm3 4.80 x 10-4 m3 =

Convert to m3... Measured dimensions of a rectangular solid: Length = 15.2 cm Width = 3.7 cm Height = 8.6 cm 0.152 m 0.037 m 0.086 m H W Find volume of solid. L V = L . W . H = (0.152 m)(0.037 m)(0.086 m) = 0.000480 m 3

Convert to mm3.

By what factor do mm and cm differ? 10 100 By what factor do mm3 and cm3 differ? 1,000 1 cm = 10 mm (1 cm)2 = (10 mm)2 1 cm2 = 100 mm2 (1 cm)3 = (10 mm)3 1 cm3 = 1000 mm3