Circular bar 1 is attached to the wall by brackets 2 and 3. Bracket 3 is supported by a pin joint at F. Bracket 2 is attached to bracket 3 by bolt assemblies. Bar 1 is subjected to an external load of 5000 N (weight of the bar is negligible). Bracket 2 weighs 400 N and bracket 3 weighs 300 N. Bar 1 is made of a material which can withstand a maximum normal stress (sigma) =10 MPa and the bolted connections are made of material which can withstand a maximum shear stress ….

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false