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System
A system (often called a closed system) is any collectionof matter within a prescribed boundary, but no matter may enter or leave the system.
Note
1. That the boundary may be real or imaginary and theshape of the boundary can change E.g.
2. Different parts of the system may be at different temperatures, pressures and velocities and may contain different sorts of matter.
3. If a fluid is passing steadily through a reservoir so thatthe mass in the reservoir is constant, we still can notconsider the reservoir as a system. Matter is crossing the boundary.
4. A system only has two kinds of interaction with itssurroundings. Work and Heat.
Positive WORK is done by a system, during a given operation, when the sole effect external to the systemcould be reduced to the rise of a weight.
Design a continuous one-way solid slab supported on beams spaced at 4.2m o.c. the width of the beam is 300mm, leaving clear slab spans of 3.9. The slab carries a uniform DL= 6 KPa.
free body digram
Dense Bituminous Macadam: A Dense Bituminous Macadam (DBM) is a close-graded premix material having a voids content of 5-10 per cent. Two gradings are normally adopted :
Question What is role of rebate in typical construction joint ? Answer Construction joints are formed on sites to facilitate construction procedure. Though, if improperly constr
who to we calculate the RL at first point.
batching by volume
types of windows
I need some help sizing a rectangular plate that will distribute my load to the simply supported beams below.
Immersed tube method for underwater crossing includes the following basic construction steps: (i) Prefabricating long tunnel units (concrete orsteel shell) in a dry-dock or shi
Design a Cylindrical Open Caisson to be sunk by 30 m of sand to support a load of 50 MN. The allowable bearing pressure is 1700 kN/m 2 . Test the feasibility of sinking the caisson
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