8/30/10

Post date: Aug 30, 2010 12:21:48 PM

• • Bell Ringer: What is the density of a 100 g piece of metal with a volume of 25 mL?

  • Review: how to find density

    • Irregular objects

      • Fill a graduated cylinder to one of the marked lines with water. Make note of what level the water is at.

      • Carefully drop the object into the water.

      • Make note of the new water level.

      • Subtract the old water level from the new one. The change in water level is the volume of your object.

    • Blocks (box shapes)

      • Use a ruler to measure the length, width, and height of the block. Measure in cm.

      • Use the equation V = l*w*h to find the volume of the block in mL.

    • Cylinders

      • Measure the height and diameter of the cylinder.

      • Divide the diameter by two to find the radius of the cylinder.

      • Use the equation V = pi*r*r*h to find the volume of the cylinder in mL.

  • Density and Buoyancy lab (due 9/1/10)