The rigid beam is supported by the three suspenderbars. Bars AB and EF are made of aluminum and bar CD ismade of steel. If each bar has a cross-sectional area of 450 mm 2 ,determine the maximum value of P if the allowable stress is(s allow ) st = 200 MPa for the steel and (s allow ) al = 150 MPa forthe aluminum. E st = 200 GPa, E al = 70 GPa

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.