As discussed in class, cavitation can cause structural damage to bodies flowing in water or water

conduits. This damage comes from micro jets, which are formed when vapor bubbles implode and they

impact the body $($e$.$g$.,$ propeller$)$ or conduit $($pipe section with a contraction$).$ The micro jets are

generated from a rapid reduction in volume when the water goes from a state of vapor to a liquid state.

This reduction in volume is stated to be over $50,000$ for a water temperature in the supplemental

information from the video used in class to discuss the topic of cavitation. Also stated in this video is

that the vapor pressure for water at a temperature of $20$C is $2300$ Pa$.$ Find the source of this vapor

pressure for a temperature of $20$C$.$ Lastly, use this source to prove the correctness of the statement

from the video that the reduction in volume for a unit mass is over $50,000$ when the vapor bubbles

collapse at $20$C$.$ For your proof, calculate the ratio of the volume of a unit mass of water in a vapor

state to that in a liquid state.