# No Pressure, get the Dragon space capsule to the ISS with only water.

This is Dragon, SpaceX's state of the art space capsule.

This is the International Space station, around 400km from Earth.

# The Math

Get the boring stuff out of the way...

The most important part of this problem is to overcome the force of gravity.

Fg = G (m1m2)/r^2

Then using the dimensions of Dragon, I found the pressure needed, and the depth of water needed to force Dragon to the ISS.

# 5.59e11 meters!

Lets put that into perspective...

The height of water needed is taller than the distance to the sun. BY A LOT.

# Why Does it Take SO MUCH WATER?

The "fountain" is only powered by gravity. As time goes on, Pressure decreases, and so does the force on Dragon. In order to maintain laminar flow and counteract the force of gravity, a huge force must be placed on Dragon over the course of the 400 km. As Dragon reaches ISS, the force of gravity weakens.

# This isn't even possible.

True. But what if the water was forced out by pistons. Pressure and Force would increase significantly, and much less water would be used.

# A Simulation

Something on a much smaller scale.

How does this apply to my experiment? Imagine that instead of water coming from inside the bottle, it was being forced by a hose right underneath the bottle. Even at full pressure, the garden hose would barely lift the bottle up a few feet, let alone 100. This is why it takes so much water to get Dragon to ISS.