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A balloon filled with helium, initially at 27°C, 1 bar, is released and rises in the atmosphere until the helium is at 17°C, 0.9 bar. Determine, as a percent, the change in volume of the helium from its initial volume.
assume that the ends of the bar have been kept at 100 degrees c for a long time. then at some instant call it t0 the
consider two concentric thin wall steel tubes the larger one closed at the bottom and the inner one open. the tubes are
You have been assigned to solve two real world composite designs and manufacture problems. The project briefs can be found below. You will discuss, investigating and proposing a solution for each problem.
Determine the elastic modulus (E), and indicate its value and show how you determined it on the appropriate curve? Explain how cold working (plastically deforming) a metal increases its strength?
an insulated cylinder is initially divided into halves by a frictionless thermally conducting piston. on one side of
a truck traveling at vo 60 mph when the driver applies the brakes to come to stop the deceleration of the truck is
Calculate the applied bending moment on a 60 mm x 160 mm rectangular beam with a maximum bending stress of 20,000 kPa.
a distillation column as shown in the figure to the right is a device used to separate components with different
When a material is subjected to a cyclic stress, large cracks grow more slowly than small cracks. The concept of a critical stress for crack propagation is only applicable to brittle materials. Materials will not break if the applied stress is kept b..
A cylindrical bar of a metal alloy of 1.5cm in diameter and 38cm in length is loaded in tension which produces an increase in length of 0.19cm. If its yield strength is 240 MPa, its tensile strength is 310 MPa and its elastic modulus is 110 GP, deter..
assume the cost of a robotic system is 151. the salary and other costs of workers replaced is 27 the saving for using
Cooks often use aluminum pans for cooking in ovens. Some cooks try to reach into the hot oven and lift the pan out without hotpads. How successful would they be? Explain
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