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A spring-loaded piston-and-cylinder device is initially filled with 0.2 lbm of a vapor-liquid mixture of R-134a at -30F and a quality of 80%. The spring constant in the spring force relation F = k x is 37 lbf/in, and the piston diameter is 12 in. The R-134a undergoes a process that increases its volume by 40%. Calculate the final temperature and enthalpy of the R-134a.
if the 50 kg. crate starts from rest and attains a speed of 6ms when it has traveled a distance of 15m. determine the
1. with reference to basic constructional features contrast the methods of compression employed by positive
Using the ideal gas model with specific heat ratio, k = 1.4, and ignoring potential energy effects, determine (a) the exit velocity, in m/s, and (b) the rate of heat transfer, in kJ per kg of gas flowing through the nozzle.
Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?
Determine the natural frequencies of the system-For the baseline system and find a design that changes the ?rst two natural frequencies more than any of the previous slight modi?cations.
a what is the approximate ductility el of a brass alloy that has a yield strength of 275 mpa? what is the tensile
At a given instant in time, flywheel OA is caused to rotate with angular velocity of w=2rad/sec and angular acceleration of alpha=6rad/s2. determine the angular velocity of links AB and BC at this instant in time. AB=.5m, BC=.4m, OA=.3m
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
1. the contraption below has a face cam with an elliptic pro?le pushing a push rod against a spring. the face cam is
tankless point-of-use water heaters are commercially available and are claimed to reduce energy usage since water is
suppose that 1000 is deposited into an account assuming the intrest is compounded quarterly that is one-fourth of the
cu and ni form a substitutional solid solution. this means that the crystal structure of a cu-ni alloy consists of ni
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