The vertical displacement v of a cracked slurry infiltrated fiber concrete member at maximum shear stress is given by v = a + bw, where w is the crack width, and a and b are estimated from data to be a = 2.5 ± 0.1 mm and b = 0.05 ± 0.01. Assume that w = 1.2 ± 0.1 mm.

a. Estimate v, and find the uncertainty in the estimate.
b. Of the uncertainties in w, a, and b, only one has a non-negligible effect on the uncertainty in v. Which one is it?


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The pump in the Rankine cycle raises the pressure of 12 kg/s of water from 20 kPa to 8 MPa. The boiler raises the temperature to 700°C, and the steam exits the turbine at a quality of 0.9, as sketched in the figure. Assume the pump and turbine are adiabatic.


The heat input to the boiler is nearest:
A) 43.6 MJ/s
B) 39.2 MJ/s
C) 31.0 MJ/s
D) 24.8 MJ/s

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Explain why split systems were developed

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When installing an exposed grid ceiling system, the first component to be installed is the _____

a. main runners b. hanger inserts and wires c. cross runners (tees) d. wall angle

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Describe WiGig and how it might be used in the home.

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