
65.
Atmospheric Pressure Applications of atmospheric pressure lead to the famed Magdeburg hemispheres. 

66. Boyle's Law Paul shows a simple derivation of the gas law. 

67.
Buoyancy of Balloons Problem solving with the buoyancy of ascending balloons is investigated. 

68.
AirBuoyancy Problems Problem solving with air buoyancy is investigated. 

69.
Bernoulli Principle Bernoulli Principle explained with examples 
70.
Bernoulli Applications More examples with classroom footage of Paul's protégé. 
