1. Engineering
  2. Mechanical Engineering
  3. i need a complete step by step solution please...

Question: i need a complete step by step solution please...

Question details

Exercise 1 a) Water is flowing in a fire hose with 1 m/s and a pressure of 200 kPa. At the nozzle the pressure decreases to atmospheric pressure (101.3 kPa) and there is no change in height. Calculate the velocity of the water exiting the nozzle b) Fire hoses have an inside diameter of 6.4 cm. Suppose such a hose carries a flow of 40 1/s starting at a gage pressure of 1.62.106 N/m2. The hose goes 10 m up a ladder to a nozzle having an inside diameter of 3 cm. What is the pressure in the nozzle? c) Convince yourself, that power is pressure times flow rate: P p Q. In the pressure version of the Bernoulli equation there are three different kinds of pressure, what meaning do the three terms in the equation (p + put pghIQ const then have? d) Suppose the fire hose in b) is fed by a pump on the ground, that receives water through a hose with a 6.4 cm diameter coming from a hydrant with a pressure of 0.7-106 N/m2. Consider the inlet and the outlet of the pump, what kind of power does the pump supply to the water and how much power does the pump have to have? e) Now compare this to the resting adult heart. The left ventricle pumps blood at a flow rate of 83 cm3/s, increasing its pressure by 110 mm Hg, its speed from zero to 30 cm/s and its height by 5 cm Calculate the total power output of the left ventricle. For what does the heart need most of its power? PHg 13600 kg/m3, pblood Pwater)I need a complete step by step solution please

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution