A hose for firefighters has an inner diameter of 10.0 cm. The pressure inside the hose is 400 kPa higher than the air pressure. The nozzle at the end of the hose has an inner diameter of 2.50 cm. a) What is the velocity with which the water leaves the nozzle? b) How many liters of water per second leaves the hose? Use 1.00 - 103 kg/m³ as density for water Hint: What equation can you use to get a relation between the velocity in the hose and at the nozzle?
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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for step 3 b, may i get an explanation how a2v2 becomes (pi d2 v)/4 ?
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