Square footing over sandy soil with qall = 224.7 kPa and soil unit weight
is of 18 kN/m3 carrying square
column (0.4x0.4) m2 with dead load
=1800 kN and live load 1200 kN. The
unit weight of the used reinforced
concreate footing is 24 kN/m3and fc
=21 mPa. The depth of embedment
is Df 1.8 m. Assume the height of
foot (h = 0.8 m and the concrete
cover = 0.1 m). Assume (1.4
DL+1.7LL=qu). The bending moment
is equal to

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?