1.Why the highest head of the water in the excavation is mathematically guaranteed to occur on the edge of the excavation. explain in mathematical and/or physical.
2.Two forces are applied to the vertical post. Determine the force and couple at O equivalent to the two forces.
3.Head loss and sunshine striking a pipeline cause the temperature of the water flowing inside to rise by 2 degrees Celsius between two measuring points. Find the heat gain in J/N and cal/N.