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A 200-mm-deep hole that is 30 mm in diameter is being produced by electrochemical machining. A high production rate is more important than machined surface quality. Estimate the maximum current and the time required to perform this operation.
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
Compute the electrical conductivity of a 7.4-mm diameter cylindrical semiconductor specimen 28 mm long in which a current of 0.20 A passes in an axial direction.
The 25-kg rectangular access door is held in the 90° open position by the single prop CD. Determine the force F in the prop and the magnitude of the force normal to the hinge axis AB in each of the small hinges A and B
the pressure inside a commercial airliner is maintained at 1.00 ATM. what is the net upward force exerted on a (1.0 m)(200 cm) cabin door if the outside pressure is 0.30 ATM?
The cylindrical gate of canal headworks, having a diameter of 3m and a length of 6 m, is subjected to water pressure up to its top as shown in the Figure. The gate resisting on the concrete floor of the headworks
Plot a curve showing the relationship of Se versus L/r for steel columns. Draw the curve for slenderness ratios that vary from 0 to 200. Assume the proportional limit = 235 MPa
An energy efficiency project has a first cost of $300,000, A life of 10 years, and no salvage value. Assume that the interest rate is 9%. The most likely value for annual savings is $60,000.
Under this load the bar elastically deforms so that the gae length increases to 2.007 in. and the cross section decreases to 0.599x0.599 in. Determine the modulus of elasticity and the poisson's ratio for this metal.
A particle has an initial speed of 27m/s. If it experiences a deceleration of (-6t)m/s^2, where t is in seconds, determine its velocity after it has traveled 10 meters. How much time does this take
A sample of argillaceous soil with a volume of 1x10-3 m3 and a mass of 1.762 kg, after oven dried, has a mass of 1.368 kg. The relative density of the grains is equal to 2.69. Determine, for the sample in its original condition
what is the reason for the relatively high strength of wood in the longitudinal direction of the tree trunk as compared to the transverse direction
The spillway section is 40 feet high, its crest length is 60 feet and the maximum discharge is 3,000 CFS when the head on the crest of the spillway is 5 feet. Using a model scale of 1:10, calculate the height of the model.
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