An object whose mass is 300 lb experiences changes in kinetic and potential energies owing to
the action of a resultant force R. The work done on the object by the resultant force is 140 lbf.
There are no other interactions between the object
Carbon dioxide (CO2) gas within a piston-cylinder assembly undergoes a process from a state
where p1 = 5 lbf/in.2, V1 = 2.5 ft3 to a state where p2 = 20 lbf/in.2, V2 = 0.5 ft3. The relationship
between pressure and volume during the process i
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Thermodynamic Properties, Property Relationships and Processes
For any property pair Y (X), this can be expressed
HW-SET-3_ENG-210 ANSWER KEY
1. A water jet that leaves a nozzle at 60 m/s at a flow rate of 120 kg/s is to be used to
generate power by striking the buckets located on the perimeter of a wheel. Determine
the power generation potential of this
HW-SET-3 ENG 210
1. A water jet that leaves a nozzle at 60 m/s at a flow rate of 120 kg/s is to be used to generate
power by striking the buckets located on the perimeter of a wheel. Determine the power
generation potential of this water jet.
A substance with a fixed chemical composition throughout
e.g. water, N2, CO2 etc.
A single-phase mixture of various elements or compounds
can be treated as a pure substance as long as the mixture is
homogeneous throughout, air is the most
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Energy, Energy Transfer, and
General Energy Analysis
W will soon learn how to apply the fi t law of thermodynamics as th
l th first l
expression of the conservation of energy principle.
But first we study the ways
ENGR210 - Thermodynamics (Solutions to Quizzes for Chapter #2)
Summer Term, 2010
Solution to the Quiz Problem for Recitation #1
a.) Here we simply write
m = AV = (1.3 kg/m3 )(0.7 m)2 (7 m/s).
or m ' 14 kg/s (answer).
b.) Then, using
E = mV 2
ENGR210 Thermodynamics (Quizzes on Chapter #2)
Summer Term, 2010
-Quiz Problem for Recitation #1
A horizontal fan with a 1.4-m diameter blade keeps air blowing at a steady rate of
7 m/s. If the local air density is 1.3 kg/m3, determine: