Density
Building Background
1. Why do you think some items sink in water and others float?
Review Questions:( p 424-429)
2. In your own words explain Archimedes principle.
3. How can you use the density of an object to predict whether it will sink or float in water?
4. How does Archimede's principle relate to the buoyant force acting on an object to the fluid displaced by the object?
5. Why does a helium balloon rise in air while ordinary balloons do not? p425
6. When a submarine pumps water out of its floation tank, its density decreases and it floats. Why does its density decrease? p425
7.How much fluid does a submerged object displace?
8. What happens when the weight of a submerged object is exactly equal to the buoyant force?
