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Specifications for steel plate to be used in the construction of a certain bridge call for the minimum yield to be greater than 345 MPa. Engineers will perform a hypothesis test to decide whether to use a certain type of steel. They will select a random sample of steel plates, measure their breaking strengths, and perform a hypothesis test. The steel will not be used unless the engineers can conclude that μ> 345.
a. Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
b. Assume the engineers test H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will they use the steel if H0 is not rejected?
Using the ideal gas model with specific heat ratio, k = 1.4, and ignoring potential energy effects, determine (a) the exit velocity, in m/s, and (b) the rate of heat transfer, in kJ per kg of gas flowing through the nozzle.
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Determine distribution of shear force and bending moment
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For a combined turbine-generator efficiency of 83%, determine the net electric output. Disregard the effect of the KE correction factors.
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Water enters a 2 meter diameter pipe at a temperature of 23 deg C. The water leaves the pipe at a temperature of 97 deg C The laminar flow rate is such that the Reynolds number is 800. What is the mass flow rate?
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