Apipe is carrying liquid at 60 degrees c, that fluctuates in pressure from 0 to 60,000 kpa (non-capped). the inside diameter of the pipe is 20 mm and the wall thickness is 1 mm and is made out of 1095 carbon steel, has a yield strength of 813 mpa and an ultimate tensile strength of 1260 mpa. using the "modified-goodman" failure criteria and a reliability factor of 99%, determine the number of cycles till failure on the inside wall. you can assume that the pipe will have a machined surface finish.?

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c