PHYS218_CHP01_11-20

PHYS218_CHP01_11-20 - 1.11 The density is mass per unit...

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Unformatted text preview: 1.11: The density is mass per unit volume, so the volume is mass divided by density. ( 29 ( 29 3 3 3 cm 3077 cm g 5 . 19 g 10 60 = × = V Use the formula for the volume of a sphere, , 3 4 3 r V π = to calculate ( 29 cm . 9 4 3 : 3 / 1 = = π V r r 1.12: % 58 . 100 ) s 10 (3.16 s) 10 π s 10 16 . 3 ( 7 7 7 = × × ×- × 1.13: a) %. 10 1 . 1 m 10 890 m 10 3 3- × = × b) Since the distance was given as 890 km, the total distance should be 890,000 meters. To report the total distance as 890,010 meters, the distance should be given as 890.01 km. 1.14: a) ( 29 ( 29 2 mm 72 mm 98 . 5 mm 12 = × (two significant figures). b) mm 12 mm 98 . 5 = 0.50 (also two significant figures). c) 36 mm (to the nearest millimeter). d) 6 mm. e) 2.0. 1.15: a) If a meter stick can measure to the nearest millimeter, the error will be about %. 13 . b) If the chemical balance can measure to the nearest milligram, the error will be about %. 10 3 . 8 3- × c) If a handheld stopwatch (as opposed to electric timing devices) can...
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PHYS218_CHP01_11-20 - 1.11 The density is mass per unit...

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