Density Prefix Conversions khdbdcm Assume your mass is
Density
Prefix Conversions khdbdcm Assume your mass is 55 kg. How many grams do you weigh?
A. SI Prefix Conversions khdbdcm 0. 8 m 1) 80 cm = _______ 2) 25 L = 25, 000 m. L _______ 3) 4500 g = 4. 5 _______ Kg 0. 805 km 4) 805 m = _______
B. Dimensional Analysis n Steps: 1. Identify starting & ending units. 2. Setup conversion correctly. 3. Multiply all top numbers, then divide by all the bottom numbers multiplied together 4. Check units & answer.
B. Dimensional Analysis n Lining up conversion factors: 1 L = 1000 ml =1 1000 ml 1 L
B. Dimensional Analysis n L How many milliliters are in 15 liters of Mt. Dew? 15 L 1000 m. L = 15, 000 m. L 1 L m. L
B. Dimensional Analysis Your European hairdresser wants to cut your hair 8 cm shorter. How many mm will he be cutting off? mm cm n 8 cm 10 mm 1 cm = 80 mm
B. Dimensional Analysis 6) How many millimeters long is a 5 K (5 km) race? km 5 km 1000 mm 1 km 1 m mm = 5, 000 mm
Measuring Volume n Volume - amount of space occupied by an object • Volume of a solid rectangle (V = l x w x h) • 1 m. L = 1 cm 3 • 1000 m. L = _____L • 1 L = _______ cm 3
Measuring Volume n n Odd shape solid Method: n water displacement Initial Volume ____ n Final Volume ____ n Object’s Volume ____ n
Density n Density - mass per unit volume (g/cm 3) (g/m. L) M D= V M D V
D = g/cm 3 or g/m. L n. M=g n V = cm 3 or m. L n
D. Density 2) You have a sample with a mass of 620 g & a volume of 753 cm 3. Find density. GIVEN: WORK: M = 620 g V = 753 cm 3 D=? D=M V M D V D= 620 g 753 cm 3 D = 0. 82 g/cm 3
D. Density n An object has a volume of 825 cm 3 and a density of 13. 6 g/cm 3. Find its mass. GIVEN: WORK: V = 825 cm 3 D = 13. 6 g/cm 3 M=? M = DV M D V M = (13. 6 g/cm 3)(825 cm 3) M = 11, 220 g
D. Density 1) A liquid has a density of 0. 87 g/m. L. What volume is occupied by 25 g of the liquid? GIVEN: WORK: D = 0. 87 g/m. L V=? M = 25 g V=M D V V= 25 g 0. 87 g/m. L V = 28. 7 m. L
Float v. Sink
B. Graphing & Density Slope = ∆Y Mass (g) ∆X Volume (cm 3)
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