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Did you look at the start of the problem calculations given in Example 5-1 at the bottom of the first image?goldfish9776 said:
yes, but i still can't understand the velocity increases by 6 times...SteamKing said:
What is the ratio between the hose diameter and the nozzle diameter?goldfish9776 said:
You've got a nozzle on the end of the hose. The water flowing through the hose is incompressible, so whatever amount goes in one end of the hose must come out the other end, in the same amount of time. You are also given the diameter of the hose and the diameter of the exit of the nozzle.goldfish9776 said:
2 /0.8 = 2.5haruspex said:
Yes. I don't think they intended the 6 to be exact.goldfish9776 said:
The formula for calculating initial velocity of water after a nozzle increase is v = (2gh)^1/2, where v is the initial velocity, g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the water column.
Calculating the initial velocity of water after a nozzle increase is important in understanding the flow rate and pressure of a fluid system. It can also help determine the efficiency of a nozzle and can be used in designing and optimizing fluid systems.
The size of the nozzle has a direct impact on the initial velocity of water. A smaller nozzle will result in a higher initial velocity, while a larger nozzle will result in a lower initial velocity. This is because a smaller nozzle creates a narrower stream of water, increasing the velocity of the water as it exits the nozzle.
No, the initial velocity of water after a nozzle increase cannot be greater than the speed of sound. The speed of sound in water is approximately 1482 m/s, and the formula for calculating initial velocity of water after a nozzle increase only applies to subsonic flows.
The initial velocity of water after a nozzle increase can be measured using various instruments such as Pitot tubes, flow meters, or by measuring the distance and time it takes for the water to travel a certain distance. It is important to consider factors such as friction and turbulence in the measurement process to get an accurate result.
