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It is reported that the iPhone (3G and 3GS) by Apple utilizes a number of engineering materials:
(a) glass, for the front display cover,
(b) steel, for the perimeter edge trim piece, and (c) plastic, for the molded rear back. Search material property databases and select candidate materials for the (a) glass, (b) steel, and (c) plastic. List the requirements for each application and list the desired characteristics of each material.
water is pumped from a lake to a storage tank 20m above at a rate of 70ls while consuming 20.4kw of electrical power.
a gymnast having a mass of 80 kg holds the two rings with his arms down in the position show as he swings downward. his
twenty pounds of a gas mixture is contained in a tank with volume 30 cubic feet at 30 psia and 70 f. the gas mixture
What is the total twist θ in the shaft - what is the total energy stored in the shaft and the shaft diameter is 0.05 m and the shear modulus G is 0.9GPa.
A vertical prismatic bar of length Land weight y per unit volume hangs from one end. The stress-strain relationship for the material is σn = B?, where n and Bare constants.
Determine the force in members CJ of the truss
estimate the average electrical drift velocity in cms for a flat plate esp with a total collector area equal to 10000
The shape of this stress-strain diagram is shown in the figure. The bar is axially loaded by tensile forces P = 20 kN, after which the loads are removed. What is the permanent set of the bar?
As shown in the picture, air flows through a pipe. Heat is supplied to the airflow. The air at the inlet is 200kPa and 20 C with flow velocity of 5m/s. The exiting air is 180 kPa and 40 °C. The diameter of the pipe is 0.28 m. Determine (a) the volume..
What is meant by ‘‘tone at the top''? Why is it so important to an effective system of internal controls?
A compressible ?ow of a gas occurs in a pipeline. Assume uniform ?ow with the x-direction along the pipe axis and state the simpli?ed continuity equation.
A smooth flat plate, 500mm long in the flow direction and 200mm wide, is maintained at 300K in a parallel flow of 0.1 m/s Refrigerant-134a at 260K. Assuming both plate sides see external flow, determine:
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