Consider a piston-cylinder assembly in which air expands adiabatically from an initial state where pi= 100 lbf/in, u = 3.704 f/ib, and t = 1000°r, to a final state where p2 30 lb/in". the process is polytronic with n=1.4. the change in specific internal energy (in turib), can be expressed in terms of temperature change as au - (0.171)(12 - 11). determine the final temperature in "r). neglect kinetic and potential energy effects.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000