75 g of metal at 100 0C is mixed with 250 g of water at 20 0C and reaches an equilibrium temperature of 25 0C.  What was the specific heat of the metal?

How much energy does it take to heat 4.0 moles of a monoatomic ideal gas from 20.0 0C to 100 0C at constant pressure? 

A refrigerator needs to move 125 J of heat from its 5.00 0C interior per cycle and move it heat to a 20.0 0C exterior region.  What is the maximum coefficient of performance possible for this refigerator?

A heat engine absorbs 350 J of heat from a 365 0C high temperature source and expels 225 J of heat to a 20.0 0C low temperature source per cycle.  What is the maximum possible work output per cycle for this engine?

Many Arab Americans face _________________________ especially after 9/11

The _______ class is also referred as the working class

Which of the following scenarios is an example of intra-generational mobility?

A person’s sex, as determined by their biology, does not always correspond with their gender.

Your vehicle is the first to arrive at an accident scene where fluid appears to be leaking from one of the automobiles. Where should you park your vehicle? 

Which resource is MOST likely sterile and disposable?