University:
Eastern Kentucky University
Course:
PHY 131 | College Physics I
Academic year:

2021
Views:

499

Pages:

1
Author:

rezancuk2j

Density Practice: Worksheet #1 Calculate density, and identify substances using a density chart. Density is a measure of the amount of mass in a certain volume. This physical property is often used to identify and classify substances. It is usually expressed in grams per cubic centimeters, or g/cm3. The chart on the right lists the densities of some common materials. Equation: Density = mass or Volume Problem Statement Sample: What is the density of a billiard ball that has a volume of 100 cm3 and a mass of 250 g? 1. A loaf of bread has a volume of 2270 cm3 and a mass of 454 g. What is the density of the bread? D = m V Formula D= m V Substance Gold Mercury Lead Iron Aluminum Bone Gasoline Air (dry) Define Variables Substitution M = 250 g D = 250 g 100 cm3 V = 100 cm3 Density (g/cm3) 19.3 13.5 11.4 7.87 3.7 1.7-2.0 0.66-0.69 0.00119 Answer 2.5 g/cm3 2. A block of wood has a density of 0.6 g/cm3 and a volume of 1.2 cm3. What is the mass of the block of wood? 3. A 800g boulder has a density of 8 g/cm3. What is the volume of the boulder? 4.What is the mass of the block of iron illustrated below? 2 cm 5 cm 10 cm Use the data below to calculate the density of each unknown substance. Then use the density chart above to determine the identity of each substance. Mass (g) Volume D = m/v Density Substance Variable Substitutions (cm3) (g/cm3) 4725 350 D = 4725 D = 13.5 Mercury 350 171 15 148 40 475 250 680 1000