Please help me build a rocket with water as propellant.
user
Building a rocket that uses water as propellant can be a fun and educational project. 
Here are the basic steps to help you get started:

Materials:

* Empty plastic soda bottle
* Cork that fits the bottle opening
* Bicycle pump or air compressor
* PVC pipe
* Nozzle
* Hot glue gun
* Water


Instructions:

* First, you need to create the rocket body. Take an empty plastic soda bottle and remove the cap.

* Make a small hole in the center of the cork that fits snugly into the opening of the soda bottle.

* Insert the PVC pipe into the hole in the cork. You may need to use hot glue to secure it in place.

* Attach the nozzle to the end of the PVC pipe. You can use a variety of nozzles, but a simple cone shape will work.

* Fill the soda bottle about one-third full of water.

* Insert the cork with the PVC pipe and nozzle into the opening of the soda bottle. Make sure it fits tightly.

* Use a bicycle pump or air compressor to pressurize the air inside the bottle.

* When the pressure reaches a sufficient level, the water will be forced out of the nozzle, creating a thrust that propels the rocket into the air.

* Launch the rocket by quickly releasing the pressure inside the bottle.


Remember to be careful when launching the rocket and always wear eye protection. 
You may want to conduct your experiments outside in an open space away from people and buildings.
assistant