Reference no: EM13703844
1. For the two processes given below, determine the final temperature, pressure, specific volume, and the changes in internal energy, enthalpy, and entropy.
a. Air at 4500 K and 450 kPa go isothermally to 8 kPa.
b. Hydrogen at 2033 K and 132 kPa go isentropic ally to 497 K.
2. Calculate the final temperature and change in specific internal energy as steel at 212 kPa and 533 K goes insenthalpically to640 kPa.
3. Determine the changes in internal energy, enthalpy, and entropy as engine oil at 70 kPa and 298 K goes to 100 kPa and 420 K.
4. What are the enthalpy, internal energy, specific volume, and entropy for steam at 1107?C and 27 MPa?
|
Brass rod is stress-free at room temperature
: A brass rod is stress-free at room temperature (20 degrees Celsius). It is then heated up but prevented from lengthening at its ends by external forces. At what temperature does the stress in the rod reach 172 MPa? Assume the modulus of elasticity is..
|
|
Contains nitrogen gas with an absolute pressure
: A rigid tank contains nitrogen gas with an absolute pressure of 113.1 kPa. A vacuum pressure gage connected to the tank reads -14.2 kPa-vacuum. What is the local atmospheric pressure (in kPa)?
|
|
Designing optimum straight-line fourbar linkages
: For an assembly line, you need to design a linkage that moves a point P in approximately a straight line over a distance of 24” in one second. It is also specified that P must return from the endpoint back to the starting point in five seconds, givin..
|
|
Air flows in adiabatic duct without friction
: Air flows in adiabatic duct without friction. At one section the Mach number is 1.5, and further downstream it has increased to 2.8. Find the area ratio.
|
|
Determine the final temperature-pressure and specific volume
: For the two processes given below, determine the final temperature, pressure, specific volume, and the changes in internal energy, enthalpy, and entropy. Calculate the final temperature and change in specific internal energy as steel at 212 kPa and 5..
|
|
A pitot-static tube is placed in a subsonic air flow
: A pitot-Static tube is placed in a subsonic air flow. The static pressure and temperature in the flow are 80 kPa and 12 oC respectively. The difference between the pitot and static pressures are measured using a manometer and found to be 200 mm of me..
|
|
Does the radius of the column matter
: Concrete has a density of 2500 kg/m3 and a compressive strength of 30 MPa. What is the maximum height of a column of concrete that can support its own weight? Does the radius of the column matter?
|
|
Identify the design variables-geometric-strength constraints
: A helical compression spring made from hard drawn wire needs to be designed to fit inside a 50mm cylindrical cavity and there must be enough space inside the coils for a 20mm cylindrical guide rod.
|
|
What statistical outcomes would distinguish a better player
: As a game, slide a matchbook across a table, trying to make it stop at some predefined point on each attempt. Measure the distance from the starting point to the stopping point. Repeat this 10, 20, through 50 times. Plot the frequency distribution fr..
|