1.A 100 kg block rests on the inclined surface for which ?s =0.4.If the coe?cient of static friction between the cord and the ?xed peg at B is ?s =0.25, determine the minimum weight of the bucket that will prevent the block from sliding down the incline.
2.A rectangular channel of 20 f t width and having n = 0.017 carries flow of 800 f t^3/s. Calculate
(a) critical depth
(b) the minimum speci c energy
(c) the speci c energy when depth of flow is 7 f t. What type of flow exists when the depth is (d) 2 f t and (e) 6 f t ?
3.For an iron-carbon alloy of composition 5 wt% Fe, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 1175C, 1145C, and 700C. Label the phases and indicate their compositions (aprox.)