1 / 9

Understanding Density: The Relationship Between Mass and Volume

Discover the concept of density and how it influences whether an object sinks or floats. Density is defined as the ratio of mass to volume (D = m/V) and is independent of the quantity of the substance. Learn to calculate density using units like g/mL or g/cm³ through various practical examples including wood, aluminum, and water. Understand why substances like ice and helium float on water and air, highlighting the importance of density in everyday life and scientific applications.

quinto
Télécharger la présentation

Understanding Density: The Relationship Between Mass and Volume

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Which is heavier? it depends

  2. Density • How heavy something is for its size. • The ratio of mass to volume for a substance. • D = m / V • Independent of how much of it you have • gold - high density • air low density

  3. Calculating • The formula tells you how. • Units will be g/mL or g/cm3 • A piece of wood has a mass of 11.2 g and a volume of 23 mL what is the density? • A piece of wood has a density of 0.93 g/mL and a volume of 23 mL what is the mass?

  4. Calculating • A piece of wood has a density of 0.93 g/mL and a mass of 23 g what is the volume? • The units must always work out. • Algebra 1 • Get the thing you want on the top, • Then get it by itself. • What ever you do to one side, do to the other.

  5. Floating • Lower density floats on higher density. • Ice is less dense than water. • Most wood is less dense than water. • Helium is less dense than air. • A ship is less dense than water.

  6. Density of water • 1 g of water is 1 mL of water. • density of water is 1 g/mL • at 4ºC • otherwise it is less

  7. Density as a conversion factor • Aluminum has a density of 2.70 g/cm3 • That means 2.70 g of aluminum is 1 cm3 • Can make conversion factors • What is the mass of 25 cm3 of aluminum? g 2.70 25 cm3 = 68 g 1 cm3

  8. Density as a conversion factor • Aluminum has a density of 2.70 g/cm3 • What is the volume of 350 gof aluminum? cm3 1 350 g = 130 cm3 2.70 g

More Related