In this lesson our instructor talks about density and buoyancy. First, she discusses density and how to find density of an irregular object. Then she talks about buoyant force and floating vs. sinking. Four complete example videos round up this lesson.
Density is the amount of matter
in a given amount of space.
Density = mass/volume (g/mL) or
Buoyancy is an upward force
that keeps things afloat.
Archimedes’ principle - A
body immersed in a fluid is buoyed up by a force equal to the weight
of the displaced fluid.
If the weight of water that is
displaced by an object in water exceeds the weight of the object
then the object will float.
If an object is less dense than
the fluid in which it is placed, it will float.
If it is more dense than the
fluid, it will sink.
When the volume of an object is
LARGER than the mass, the density is less than 1.0 g/cm3
Density & Buoyancy
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.