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Engineering
The speed of an aircraft is given to be 260 m/s in air. If the speed of sound at that location is 330 m/s, the flight of the aircraft is _____.
Which of these formulas is the equivalent of I=E/R?
Make a copy of the pthreads_skeleton.cpp program and name it pthreads_p2.cpp Modify the main function to implement a loop that reads 10 integers from the console (user input) and stores these numbers in a one-dimensional (1D) array (this code will go right after the comment that says ""Add code to perform any needed initialization or to process user input""). You should use a global array for this.
Which of the following is NOT true about digital media? O a Can use it at any time, from almost any place. b Oc O d People have to use it to communicate. People can use it to share information. People can use it to create new things.
Provides steady-state operating data for a cogeneration system with water vapor at 20 bar and 360°C entering at location 1. The system develops power at a rate of 2.2 MW. Process steam exits at location 2, and hot water for other process uses exits at location 3. Evaluate the rate of heat transfer in MW between the system and its surroundings. Let g = 9.81 m/s².
Two parallel, aligned disks, 0.4 m in diameter and separated by 0.1 m, are located in a large room whose walls are maintained at 300 K. One of the disks is maintained at a uniform temperature of 500 K with an emissivity of 0.6., while the backside of the second disk (disc 2) is well insulated. Room is large enough to be considered as a black body. Assuming the discs are diffuse, gray surfaces, answer the following questions: (a) Compute the view factors F12 and F13 [2 points] (b) Draw the radiation network for this problem [2 points] (c) Write an equation for radiation balance at surface 1 [2 points] (d) Write an equation for radiation balance at surface 2 [2 points] (e) Compute the temperature of the second disk. [2 points]
What is the environmental purpose of issuing hunting licenses?
Assuming `qualified` is already declared, code a fall-through switch statement to print the following messages: When `qualified` is 1 or 2: "You are a student or teacher and you get a 10% discount." When `qualified` is 3 or 4: "You are a senior citizen or military and you get a 12% discount." For any other value of `qualified`: "Sorry, you're not eligible for a discount."
A concentric tube heat exchanger for cooling lubricating oil is comprised of a thin-walled inner tube of 25 mm diameter carrying water and an outer tube of 45 mm diameter carrying the oil. The exchanger operates in counterflow with an overall heat transfer coefficient of 60W/m2K and the tabulated average properties given below. If the outlet temperature of the oil is 60oC, plot the temperature as a function of x and determine the total heat transfer, the outlet temperature of the water, and the required length.
The 0.2% proof stress is used to define the yield stress for some metals. a) True b) False
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