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Chapter 11: Q4PE (page 396)

A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. What is the density of a 240grock that displaces89.0 cm3of water? (Note that the accuracy and practical applications of this technique are more limited than a variety of others that are based on Archimedes’ principle.)

Short Answer

Expert verified

The density of the rock is obtained as: 2.70 g/cm3.

Step by step solution

01

Conceptual Introduction

Fluid statics, often known as hydrostatics, is a branch of fluid mechanics that investigates the state of balance of a floating and submerged body, as well as the pressure in a fluid, or imposed by a fluid, on an immersed body.

02

Given Data

The mass of rock ism=240 g.

The volume of the rock is ρ=89 cm3.

03

Calculating the volume of the given substance

As we known that the density is the rate of mass per volume let’s put the given data in the formula given below.

ρ=mV=240g89cm3=2.7g/cm3

Therefore, the density of the rock is: 2.70 g/cm3.

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