Problem 1: Water flows steadily from a tank, through a hose of diameter D = 40 cm, and exits to the atmosphere from a nozzle of diameter d = 10 cm as shown. The pressure in the tank remains constant at 300 kPa (gage) and the atmospheric conditions are standard temperature and pressure. The tank is large that the velocity of the flowing water in it can be neglected. Density of water p = 1000 kg/m' 1. Find the velocity of water in the nozzle 2. Find the volume flow rate (discharge) ir ie nozzle 3. Find the velocity of water in the hose 4. Find the pressure in the hose D= 40 cm d = 10 cm pi = 300 kPa (gage) (1) Water Figure 1

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Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.