Problem 8-49 from the textbook, Mechanics of Materials by R.C. Hibbler. It is the 10th addition.
In: Mechanical Engineering
Nitrogen (N2) at 1 bar, 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 16 bar, 750 K. The N2 is modeled as an ideal gas and kinetic and potential energy effects are negligible. Determine the work input, in kJ per kg of N2 flowing, the rate of entropy production, in kJ/K per kg of N2 flowing, and the isentropic compressor efficiency.
In: Mechanical Engineering
What are the 5 different type of sensory warnings for product safety?
In: Mechanical Engineering
Describe the physical structure of bonded abrasives.
identifying what is grit number, bond strength, and porosity.
In: Mechanical Engineering
Water vapor at 5 MPa, 320°C enters a turbine operating at steady
state and expands to 0.1 bar. The mass flow rate is 2.52 kg/s, and
the isentropic turbine efficiency is 92%. Stray heat transfer and
kinetic and potential energy effects are negligible.
Determine the power developed by the turbine, in kW.
In: Mechanical Engineering
Rank the following from most isotropic to least isotropic.
Unidirectional Long Fiber
Random short
Fiber Randon long fiber (not woven)
Oriented short Fiber
In: Mechanical Engineering
i have to write a survey paper on the history of a dynamics related concept, tool, application, or mechanism. i am struggling to find good topics. please help me by suggesting some topics
In: Mechanical Engineering
Consider a machine that has a natural process time of 1 minute (deterministic) when it works but is subject to failures with MTTF=100 minutes and MTTR=10 minutes. Assume cr=1. This machine receives parts every 1.5 minutes from the previous process (deterministic).
a. What is the availability of this machine?
b. What is the average effective process time, te, for this machine?
c. What is the squared coefficient of variation of the process time, ce2?
d. How long does the average part wait in queue in front of this machine before being served?
Suppose you are observing parts come out of this machine.
e. What is the average rate with which parts depart this machine and arrive to the next machine?
f. What is the squared coefficient of variation of inter-departure times from this machine?
In: Mechanical Engineering
Explain what are the properties (that is, relating to its velocity vs temperature) of a SAE 5W/30 oil
In: Mechanical Engineering
List 5 Suitable applications of Lubricating Greases in Mechanical Engineering?
In: Mechanical Engineering
Water flowing at a rate of 0.667 kg/s (Cp = 4.192 kJ/kg. K) enters a counter current heat exchanger at 318 K and is heated by an oil stream entering at 393 K at a rate of 2.85 kg/s (Cp=1.89 kJ/kg. K). The overall U=290 W/m2. K and the area A=20 m2. Calculate the heat transfer rate and the exit water temperature.
In: Mechanical Engineering
In: Mechanical Engineering
information about the metal additive manufacturing process and defects and parameters
In: Mechanical Engineering
I want an example that explains and calculate the kinetics rocket based on FBD by idealizing the NASA space shuttle to a particle which has curvilinear motion. Assume the Earth is flat and state all other assumptions
In: Mechanical Engineering
Plot longitudinal tensile strength of an E-glass/epoxy unidirectionally reinforced composite as a function of volume fraction of fiber and assuming tensile strength follows a volume rule of additivity.
E-glass: modulus = 72.4 GPa, tensile break strength = 2.4 GPa, break strain = 2.6%
epoxy: modulus = 3.5 GPa, tensile break strength = 45 MPa, break strain = 1.28%
In: Mechanical Engineering