# Physics Lab report 7

Topics: Density, Coca-Cola, Diet Coke Pages: 4 (1936 words) Published: October 26, 2014

Experiment 7: Relative Density
Laboratory Report
Marella Dela Cruz, Janrho Dellosa, Arran Enriquez,
Alyssa Estrella, Zacharie Fuentes
Department of Math and Physics
College of Science, University of Santo Tomas
España, Manila Philippines
Abstract
The experiment was conducted to show the different methods on how to determine an object’s composition through its density and to determine an object’s density by displacement method and the Archimedes Principle. Results show that. The materials used were the spring scale, beaker, 25 pieces of new 25 centavo coins, a bone from a pig’s leg, diet and regular soft drinks, and a pycnometer. 1. Introduction

Density is a physical property of matter. It is the mass per unit volume of a substance. In this experiment, relative density is also used to be able to determine the composition of the substances or objects used. Relative density is the ratio of a density of a substance to that of the density of a given reference material. It is also known as specific gravity. Density is used when making or building objects that are required to float such as ships on water and airplanes in the sky. Objectives:

1. To determine the density of an object by displacement method 2. To determine the composition of a substance based on its density 3. To determine the density of a substance by Archimedes Principle 2. Theory

Relative Density (R.D.) or also known as Specific gravity (S.G.), is the raito of the density of a substance to the density of a given reference material. The object’s mass is weighed on the electronic balance and the volume of the specified object is determine by a graduated cylinder where the initial reading is accounted for and the final reading where the object was dropped in the cylinder. Volume= Vf- Vi ; whereVf is the Final reading or volume and Vi is the initial reading or volume in the cylinder. Density is described in this equation p= MV where M is the mass of the object and V is the Volume...

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