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A student decides to build a boiler for a model steam engine. He cuts some thin sheet metal into a strip, rolls it into a spiral, and puts on end caps, as shown in the diagram. The diameter of the cylinder D = 35 mm and wall thickness t = 2.5 mm. The student has some fancy glue, and uses it to secure the spiral seam. After applying the glue, he applies a torque T to clamp the edges of the seam shut. With the torque still applied, he puts some water inside, heats the boiler, and a steam pressure p = 127 kPa is created. After a while, the student notices that the heat has caused the glue to melt and run out. However, even when the cylinder is pressurized, the torque T is still sufficient to keep the seam closed so that no water leaks out. Determine the angle theta degrees that requires the minimum torque T to keep the seam closed. (Hint: use Mohr's circle). Give the answer in degrees.
rocket boosts the speed of a spacecraft from 7500 m/s to 10 500 m/s with a thrust of 890 kN. Calculate the rocket power.
Show that the spacing between (111) planes in the FCC structure is the same as the spacing (002) planes in the HCP structure. Imagine the atoms to behave as hard spheres.
determine the stresses and the rotation of the body at x= 0.050m and y=0.020m is the displacement field compatible?
The system is at rest in the position shown, with the 12-lb collar A resting on the spring (k = 20 lb/ft), when a constant 30-lb force is applied to the cable. What is the velocity of the collar when it has risen 1 ft? The collar is attached to th..
Find the approximate location of the laminar turbulent transition - what is the net heat removed by the air around the rod?
Assuming the pulley is a uniform disk with a mass of 0.31 {rm kg}, find the speed of the block after it has fallen through a height of 0.50 {rm m}.
the light right-angle boom which supports the 400-kg cylinder is supported by three cables and a ball-and-socket joint O attached to the vertical x-y surface. Determine the reactions at O and the cable tensions.
Each turbine stage isentropic efficiency of 85% FWH is open T-S diagram for cycle? What is thermal efficiency and the moisture content of the steam leaving the low-pressure turbine?
What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?
A slotted disk and opto-interrupter outputs pulses at 62 HZ. The disk has only one slot cut in it. what is the rotating speed of the disk in rpm?
How do I find the factor of safety using the distortion energy failure theory?
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.
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