Day Four:

 Apparatus:

 We used a  fire syringe and cotton.

The purpose of the fire syringe is to compress the air inside the tube as quickly as possible.

Calculation:

This is an example of an adiabatic process because we compress the air so quickly that  their is no significant heat flow. As the volume is compressed the temperature goes way up at a tremendous rate. We predicted that the temperature inside the tube will be around 2340°F for an a brief instant, and since cotton will catches fire when its temperature is more than 451°F, the cotton will light up.

Activ Physics: 

An isobaric process is a process in which the pressure does not change, so ∆U, Q, & W are not zero. An isochoric process is a process in which volume does not change, so W=0 and ∆U=Q. An isothermal process is a process which temperature does not change, so ∆U, Q, & W are not zero.