Summary

• Ideal gas law
• Temperature scales

Class Quiz

• Internal energy
  • definition
  • the four buckets
  • molecular motion applet
    Example #1
    
  • definition of heat
  
  
• Heat
  • mechanical equivalence
  • food Calories, jelly doughnuts
  
  
• specific heat
  • Q = mcDT
  • cooling soda
    Example #2
    
    Example #3
    
  • the four buckets

 
A metal buoy has a volume of 2.0 m³ and floats in water. How much of the buoy is submerged if it has a mass of 500 kg?
A. 0.25 m³           B. 0.50 m³           C. 1.0 m³           D. 1.5 m³
Answer













 
How do the internal energies of a cup of water and a gallon of water at the same temperature compare?
A. They're the same.
B. The cup has more I. E.
C. The gallon has more I. E.
Answer













 
You stir some juice with a force of 20 N for a total distance of 30 m. How much heat have you transferred?
A. 143 cal           B. 300 cal           C. 600 cal           D. 2510 cal

Answer













 
If the mass of the juice is 2.0 kg, what is the temperature change of the juice? Use the specific heat of water.
A. 0.014 �C           B. 14 �C           C. 0.072 �C           D. 71.5 �C
Answer













 



B. 0.50 m³


















 



C. The gallon has more I. E.


















 



A. 143 cal


















 



C. 0.072 �C