the best psi for launching a bottle rocket high is 65 psi because usually you want it to go high without a big chance of exploding in you face
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The weight of a Saturn V rocket just before launch is approximately 3 039 000 Kg.
y wont this site actuly anser questions?
The amount of exposed surface area of the fuel
The cost of a Saturn V including launch around 185 million dollars in 1969.
depends of what size motor you want to launch
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If it is a commercially produced water/air rocket, follow the instructions exactly. They will tell you how much you need.If you made it yourself from a plastic bottle, you should perform a series of experiments to see how much water gives the best altitude.BTW, there is no fuel in these rockets. Water is the propellant that "pushes" on the rocket as it leaves the nozzle. Air pressure pushes the water out the nozzle.
5 Million Newtons was the pressure exerted by Saturn v rocket
The weight of a Saturn V rocket just before launch is approximately 3 039 000 Kg.
Not much really. The rocket took flight as expected. The big thing was that it was the first successful launch of an object into orbit.
y wont this site actuly anser questions?
Yes, in a sense. In a water rocket, the water is reaction mass. That is the water expelled from the nozzle on the bottom pushes the rocket in the opposite direction. The more reaction mass expelled, the higher the rocket will go. From practical experience, however, you'll find that there is a tipping point. What I mean by this is that there will be a point when too much water will be too heavy, and the rocket will not be able to hold the pressure (water cannot be compressed, so some airspace is necessary), and will not gain much if any altitude.
thrust
The amount of exposed surface area of the fuel
The cost of a Saturn V including launch around 185 million dollars in 1969.
No, because you need to change something, and measure how high it goes to see how changing one thing can affect the height. For example, if you are using air to launch the rocket, you could change how much air pressure you use, and measure the difference. "How does air pressure affect height?" is a scientific question. Remember if you do this, you must keep everything else the same, or it won't be a fair experiment.