PhysicsGuy 

First some speculation on the development of undiscovered technologies:

Imagine you are stranded on a desert island in the middle of a vast ocean. You need water to survive.



You’ve explored your island and discovered there is a freshwater spring located at the bottom of an underground cave.



You don’t have a water pump, but you do have some bamboo stalks you can use for piping. You also know about the technology I am presenting here. You know you can pump water with sound waves.



You know that a large pipe organ can generate a 16 Hz sound wave with a 32 foot long pipe. You set up a 32 foot long pipe on a tall hill so that prevailing winds cause it to resonate at 16 Hz. You can’t hear this sound wave but you can feel it. You use your bamboo pipes to transmit this ultra low frequency sound wave to the bottom of your cave. The sound waves make the water in your pipeline create cavitation voids that explode and drive water up your pipe. You now have plenty of fresh water to drink. You’ve invented a new technology.



But you’re not done yet. You’ve got an inexhaustible source of water and you realize you can pipe it anywhere you want. So you use the water to carve water channels around your island. You make some rafts for transporting building materials like rocks and logs on these channels. You start building a shelter out of these rocks and logs.



You remember something about a Kelvin high voltage generator. You modify Kelvin’s design to work with the water ejected from another sound-powered water pump you built that works at 100 Hz. The water coming out of your pump comes out in a stream of droplets at a high velocity. This is ideal for efficiently generating electricity using Kelvin’s generator design.

You know that carbon conducts electricity, so you embed carbon from your wood fires into cellulose plant fibers to make electrically conducting non-metal wires.

Ok, so now you can generate electrical sparks, and you can store this high voltage electricity in carbon- coated bamboo jars or Leyden jars.  What do you do with it?

You can start a fire with electrical sparks. You can etch wood with electrical sparks. If you can get high enough voltages you could even etch stones. That’s interesting. With an even higher voltage under the right conditions you might even be able to cut wood with it, and maybe even stone. Basically you’ve made a high voltage arc welder. But you want to be careful, so you make electrically insulating gloves out of dried plant fibers knowing that cellulose is a good electrical insulator.

You start making small amounts of glass using a kiln you made and sand from the beaches on your island. At first you make cups but then you move on to making glass bulbs with various gases trapped inside them. You remember that most gasses like oxygen and nitrogen will glow under a high voltage, so you place a high voltage across these glass bulbs and watch them glow. You’ve made a crude light bulb.



All of this can be seen as wild speculation. I don't know if the water pump presented here can be scaled up in size. The following videos of sound being used to pump and spin water makes me wonder if this type of water  technology could be developed. I'm going to find out. Water is truly amazing stuff.

Using Sound Waves to Pump Water