the Sterling engine, Carnot heat engine questions?

#Describe what you observed during the Sterling engine demonstration. What type of engine is a Sterling engine? A Sterling engine converts _________ into _________. (fill in the blanks) How does the Sterling engine work? Why did the boiling water make the Sterling engine spin faster than the ice water?

#A particular Carnot heat engine absorbs energy from a furnace and rejects energy to the atmosphere at 27°C. Graph the efficiency of this heat engine as a function of the temperature of the furnace. Use a range for TH of 100°C to 1700°C. What can be concluded from this graph?