Mechanicalenergyintransitionisreferredtoas（）.
A: horsepower
B: work
C: heat
D: velocity
A: horsepower
B: work
C: heat
D: velocity
举一反三
- Mechanicalenergyintransitionisreferredtoas（）. A: horsepower B: work C: heat D: velocity
- A control volume is: （ ） A: An isolated system B: A closed system but heat and work can cross the boundary C: A specific amount of mass in space D: A fixed region in space where mass, heat and work can cross the boundary of that region
- Work is taken negative when the work is done by the system and heat is taken as positive when it is transferred into the system. （ ）
- Which one is not a state function? A: Enthalpy B: Internal energy C: Entropy D: Work/Heat
- DU = 100 J is for a system that gives off 100 J of heat and ( ) A: does no work B: does 200 J of work C: has 100 J of work done on it D: has 200 J of work done on it.