To mince words, Musk used the word "tunnels" (and not "tubes"), perhaps intentionally?? Tunnels are know for leaking water (and air), while tubes (or pipelines) are implied to not leak. At any rate, the subject of…
The drag of ships moving at less than hull speed (non planing) is a function of: skin friction (shearing of the boundary layer), wave making, and Reynolds number (related to the length of the ship, and the viscosity of…
Pressuring a system (depending on the pressure) would be more stress and risk than a vacuum. Depending on materials used (concrete for instance - that prefers to be loaded in compression), the vacuum can actually…
You are correct that reasonable people do not fear what is safe. Phobia rules the minds of the irrational. Many refuse to fly in a commercial jet in spite of the fact it is 1/15th the risk of driving in a car the same…
To mince words, Musk used the word "tunnels" (and not "tubes"), perhaps intentionally?? Tunnels are know for leaking water (and air), while tubes (or pipelines) are implied to not leak. At any rate, the subject of…
The drag of ships moving at less than hull speed (non planing) is a function of: skin friction (shearing of the boundary layer), wave making, and Reynolds number (related to the length of the ship, and the viscosity of…
Pressuring a system (depending on the pressure) would be more stress and risk than a vacuum. Depending on materials used (concrete for instance - that prefers to be loaded in compression), the vacuum can actually…
You are correct that reasonable people do not fear what is safe. Phobia rules the minds of the irrational. Many refuse to fly in a commercial jet in spite of the fact it is 1/15th the risk of driving in a car the same…