Question

Pls help! This is my question..

A sample of iron has dimensions of 2 cm x 4 cm x 6 cm and a mass of 100g. What is the density of the sample?

Answer 1

First mass/volume is density
So,
1000/48

Answer 2

What do we know:

• the dimensions ⇒ can help us find the volume, area, surface area
• mass

What do we want to find ⇒ Density

To solve that,

  ⇒ must find the relationship between density, mass, and volume

• Definition of density: mass per unit volume

         ⇒ Density = mass / volume

Now let's convert some units to make it into a standard answer:

• mass = 100g   ⇒ 0.1 kg      (1000g = 1kg)
• volume = 2 * 4 * 6 = 48 cubic centimeters = 0.000048 cubic meter

               (1 cubic meter = 1000000 cubic centimeter)

               

   ⇒ Density = 0.1 / 0.000048 = 2,083.33 kilograms per cubic meter

Hope that helps!