1 / 9

Volume and Density in the SI System why things float or sink…metrically

0. Volume and Density in the SI System why things float or sink…metrically. Unit 1 – Lecture 4. 0. Metric Density and Water. The SI system is better than the English/Imperial system at converting length measurements to volume measurements.

marvel
Download Presentation

Volume and Density in the SI System why things float or sink…metrically

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. 0 Volume and Density in the SI Systemwhy things float or sink…metrically Unit 1 – Lecture 4

  2. 0 Metric Density and Water • The SI system is better than the English/Imperial system at converting length measurements to volume measurements. • Density of Water = 1 g / cm3 [same as 1 g / 1 mL] • 1 gram of water • at 4 C • having a volume of 1 cm3 [one cm3 = one mL]

  3. 0 Common SI Volume Conversions • 1cm3 = 1mL • 1,000cm3 = 1,000mL • 1L = 1,000mL • 1,000mL = 1L = 1,000cm3

  4. 0 Density Formula Knowing the volume, mass, and/or density of a substance will allow you to infer as to the missing quantity. • Density = mass d = m volume v • Mass = Density * Volume • Volume = Mass / Density

  5. 0 Some Common Densities in g/cm3 Iridium, a rare metal found in asteroids, comets, and meteorites has the highest natural density at 22.16 g/cm3.

  6. 0 Will it float? • When any two substances are mixed, the less dense substance will float on the more dene substance • density differences cause convection

  7. Convection • Convection – circular currents or movements within a liquid or gas due to density differences of temperature • for the same liquid: • warmer = less dense • rises • cooler = more dense • sinks

  8. Practice Problem #1 • A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the ring pure gold? Pure gold is 19.3 g/mL • going from g/mL  g/mL…no conversion needed • d = m/v • 18.9 g = __?__ 1.12 mL 1 mL • This sample has a density of 16.875 g/mL; so no, it is not pure gold

  9. Practice Problem #2 • If the density of air = 1.30 g/L, how many grams of mass does a 250.0 mL volume of air have? • convert L  mL • 250.0 mL = .2500 L • d = m / v • 1.30g = mass L .2500L • mass = .325 g

More Related