1.A prismatic bar is loaded by an axial force P. Show that P must be directed through centroids of cross section if axial stress SIGMA is not to vary over a cross section.
2.A fluid that occupies a volume of 32 L weighs 280 N at a location where the gravitational acceleration is 9.8 m/s2. Determine the mass of this fluid and its density.
3.The density of an ideal gas decreases by 10% when compressed isothermally from 10 atm to 11 atm. Determine the percent decrease in density of the gas if it compressed isothermailly from 1000 atm to 1001 atm.
4.What would the height of a water tower with a 500 gallon tank have to be, to bring water ( by gravity ) from sealevel over a distance of 2.5miles with an elevation of 300ft?