Introduction to SAT II Physics

If we know our formulas, this problem is easy. The heat into the system is = 80 J, and the

heat out of the system is = 20 J. The efficiency, then, is: 1 – 20 80 = 0.75 = 75%⁄.

Key Formulas

Conversion

between

Fahrenheit and

Celsius

Conversion

between Celsius

and Kelvin

Relationship

between Heat

and

Temperature

Coefficient of

Linear

Expansion

Coefficient of

Volume

Expansion

Ideal Gas Law

Boyle’s Law

Charles’s Law

First Law of

Thermodynami

cs

Efficiency of a

Heat Engine