In reality, there are two reasons gravity trains do not exist. First, a lengthy transit distance would pierce the Earth’s mantle and traverse a region where rock is more fluid than solid. No materials are known that would withstand the tremendous heat and pressure in the inner core. Temperature is estimated as 5,700 K (5,430 °C; 9,800 °F), and pressure as high as about 330 to 360 gigapascals (3,300,000 to 3,600,000 atm). Secondly, frictional losses would be significant. Rolling friction losses could be reduced by using a magnetically levitated train. However, unless all air is evacuated from the tunnel, frictional losses due to air resistance would render the gravity train unusable. Evacuating the atmosphere to make it a vactrain would eliminate this drag but would require additional power. Such objections would not apply for solid planets and moons that do not have an atmosphere.
Ep. 42 – Missouri Loves Company
Ep. 41 – I once had a wife named Ginger...
Ep. 40 – Yes We Leprechaun!
Ep. 39 – It should've gone without saying
Ep. 38 – Sicilians, you're breaking my heart
Ep. 37 – Curly Fried Tubers
Ep. 36 – Turducken of Unknown Knowledge
Ep. 35 – Copper Cooper Cobbler Co-op
Ep. 34 – Brooklyn Platonic Association of Podcasters
Ep. 33 – There may be a chuckle in here somewhere
Ep. 32 – Pinball Machine of Common Sense
Ep. 31 – Jovian Ring Cave
Ep. 30 – I put a spell on you
Ep. 29 - Spooktacular: Authenticate Your Potential to be a Mannequin
Ep. 28 - What is your Clown King doing now?
Ep. 27 - Cowboy Caught The Same Fish Twice
Ep. 26 - What do you want to be plumb with?
Ep. 25 - The Defenestrated Fire Engine
Ep. 24 - Shoeing a Bald Nun
Ep. 23 - Master of Creative Darkness
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