Air Pressure & Density

1.) What are the different values of “standard sea level air pressure” in the following units:

– pounds per square inch?

– millibars?

– inches of mercury?

– centimeters of mercury?

 

2.) What is the significance of air pressure to the Earth’s weather?

 

3.) When comparing the density of an object with the density of water, how do we determine if an object floats or sinks in water?